Saturday, February 29, 2020

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2724

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2724

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

DT-47825-10 - Jumper Harness

Circuit/System Verification

1. Engine running in Park position. Move the gear shifter lever into each gear position and back into Park position. Verify with a scan tool the

following test status parameters display OK:

* Line Pressure Control Solenoid Performance Test Status

* Line Pressure Control Solenoid Control Circuit High Voltage Test Status

* Line Pressure Control Solenoid Control Circuit Low Voltage Test Status

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly

Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission and

Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve assembly

electrical connector.

5. Ignition ON, verify with a scan tool the following test status parameters display OK:

* Line Pressure Control Solenoid Performance Test Status

* Line Pressure Control Solenoid Control Circuit High Voltage Test Status

* Line Pressure Control Solenoid Control Circuit Low Voltage Test

瀚慖f any test status parameter displays Fault or Malfunction, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

2ML70 - Automatic Transmission

DTC P0961-P0963

Diagnostic Instructions

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2723

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2723

solenoid increases line PC solenoid oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the line PC solenoid decreases

line PC oil pressure by opening the solenoid exhaust port. Line PC solenoid power is supplied by the TCM through a high side driver (HSD). The

HSD protects the circuit and components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault

is corrected the HSD will reset.

Conditions for Running the DTC

P0961, P0962, or P0963

* The engine speed is greater than 500 RPM for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* DTCs P0961, P0962 or P0963 are not set.

Conditions for Setting the DTC

P0961

The TCM detects an internal electrical malfunction of the line PC solenoid where the measured line PC solenoid current does not equal the

commanded line PC solenoid current for 5 seconds.

P0962

The TCM detects a short to ground or an open/high resistance on the line PC solenoid control circuit for 1 second.

P0963

The TCM detects a short to voltage on the line PC solenoid control circuit for 1 second.

Action Taken When the DTC Sets

P0961

* DTC P0961 is a Type A DTC.

* The TCM freezes transmission adaptive functions.

P0962

* DTC P0962 is a Type A DTC.

* The TCM turns the high side driver OFF.

* The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.

* The TCM inhibits the torque converter clutch (TCC).

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

P0963

* DTC P0963 is a Type C DTC.

* The TCM freezes transmission adaptive functions.

* The TCM commands maximum line pressure.

Conditions for Clearing the DIC/DTC

* DTCs P0961 and P0963 are Type C DTCs.

* DTC P0962 is a Type A DTC.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Description and Operation

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

Electrical Information Reference

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2722

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2722

4. Connect DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve assembly

electrical connector.

5. Ignition ON, verify with a scan tool the following test status parameters display OK:

* Line Pressure Control Solenoid Performance Test Status

* Line Pressure Control Solenoid Control Circuit High Voltage Test Status

* Line Pressure Control Solenoid Control Circuit Low Voltage Test

瀚慖f any test status parameter displays Fault or Malfunction, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

6L50/6L80/6L90 - Automatic Transmission

DTC P0961-P0963

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0961

- Line Pressure Control (PC) Solenoid System Performance

DTC P0962

- Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

DTC P0963

- Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The line pressure control (PC) solenoid is part of the control solenoid valve assembly which has no serviceable parts. The normally high line PC

solenoid regulates and directs the PC solenoid oil pressure to the isolator/pressure regulator valve. Increasing PC solenoid line pressure increases

transmission line pressure. The TCM varies the current to the line PC solenoid through a low side driver. Decreasing the current to the line PC

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1989

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1989



According to each shift control solenoid assembly, the transmission shifts from 1st gear into 6th gear and vice versa. As a fail-safe function, if any



shift control solenoid assembly abnormality occurs, the TCM will disable the current to the solenoids.



Conditions for Running the DTC



P2725



* The ignition voltage is 10.2-15.5 V.



* The engine speed is greater than 400 RPM for 2 s.



* The transmission is not in emergency mode.



* Driving in D range.



* TCM communication is normal.



* DTCs P2729 and P2730 are not set.



P2728



* The ignition voltage is 10.2-15.5 V.



* The engine speed is greater than 400 RPM for 2 s.



* The transmission is not in emergency mode.



* Driving in D range.



* TCM communication is normal.



* The automatic transmission fluid temperature is more than 20掳C (68掳F).



* SLB1 current is more than 0.85 A.



* SLB1 current is not changed.



P2729



* The ignition voltage is 10.2-15.5 V.



* The engine speed is greater than 400 RPM for 2 s.



* The transmission is not in emergency mode.



* Driving in D range.



* TCM communication is normal.



* DTC P2730 is not set.



P2730



* The ignition voltage is 10.2-15.5 V.



* The engine speed is greater than 400 RPM for 2 s.



* The transmission is not in emergency mode.



* Driving in D range.



* TCM communication is normal.



* DTC P2729 is not set.



Conditions for Setting the DTC



P2725



Deviation between commanded current and feedback current.



P2728



The TCM detects the error current more than 80 mA for 2.75 ms.



P2729



The TCM detects at least 5 times less than 23 mA current consumption of the SLB1 control circuit for 100 ms.



P2730



The TCM detects at least 5 times more than 1.333 A current consumption of the SLB1 control circuit for 100 ms.



Action Taken When the DTC Sets



P2725, P2728



* DTC P2725 and P2728 are Type B DTC.



* The TCM turns OFF all solenoids.



* The TCM allows the vehicle to operate only in the second gear and "R" range after a stop.



P2729, P2730



* DTCs P2729 and P2730 are Type B DTCs.



* No self learning function.



* The TCM turns OFF all solenoids.



* The TCM allows the vehicle to operate only in the second gear and "R" range after a stop.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2721

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2721

* The TCM commands maximum line pressure.

Conditions for Clearing the DIC/DTC

* DTCs P0961 and P0963 are Type C DTCs.

* DTC P0962 is a Type A DTC.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Description and Operation

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

DT-47825-10 - Jumper Harness

Circuit/System Verification

1. Engine running in Park position. Move the gear shifter lever into each gear position and back into Park position. Verify with a scan tool the

following test status parameters display OK:

* Line Pressure Control Solenoid Performance Test Status

* Line Pressure Control Solenoid Control Circuit High Voltage Test Status

* Line Pressure Control Solenoid Control Circuit Low Voltage Test Status

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly

Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission and

Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2720

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2720

Typical Scan Tool Data

Circuit/System Description

The line pressure control (PC) solenoid is part of the control solenoid valve assembly which has no serviceable parts. The normally high line PC

solenoid regulates and directs the PC solenoid oil pressure to the isolator/pressure regulator valve. Increasing PC solenoid line pressure increases

transmission line pressure. The TCM varies the current to the line PC solenoid through a low side driver. Decreasing the current to the line PC

solenoid increases line PC solenoid oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the line PC solenoid decreases

line PC oil pressure by opening the solenoid exhaust port. Line PC solenoid power is supplied by the TCM through a high side driver (HSD). The

HSD protects the circuit and components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault

is corrected the HSD will reset.

Conditions for Running the DTC

P0961, P0962, or P0963

* The engine speed is greater than 500 RPM for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* DTCs P0961, P0962 or P0963 are not set.

Conditions for Setting the DTC

P0961

The TCM detects an internal electrical malfunction of the line PC solenoid where the measured line PC solenoid current does not equal the

commanded line PC solenoid current for 5 seconds.

P0962

The TCM detects a short to ground or an open/high resistance on the line PC solenoid control circuit for 1 second.

P0963

The TCM detects a short to voltage on the line PC solenoid control circuit for 1 second.

Action Taken When the DTC Sets

P0961

* DTC P0961 is a Type A DTC.

* The TCM freezes transmission adaptive functions.

P0962

* DTC P0962 is a Type A DTC.

* The TCM turns the high side driver OFF.

* The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.

* The TCM inhibits the torque converter clutch (TCC).

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

P0963

* DTC P0963 is a Type C DTC.

* The TCM freezes transmission adaptive functions.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2719

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2719

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.

Circuit/System Verification

1. Engine ON, verify the transmission fluid temperature is between 50-80掳C (122-176掳F).

2. Operate the vehicle long enough to verify at least a 3掳C (5掳F) rise in TCM temperature parameter, then operate the vehicle in Park for 5

seconds.

3. Engine ON, observe the scan tool Line PC Sol. CKT Status parameter. The reading should display OK or Indeterminate.

瀚慖f the reading is not within the specified range, replace the control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/2ML70 - Automatic Transmission/Control

Solenoid Valve and Transmission Control Module Assembly Inspection) for control solenoid inspection.

* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,

setup, and programming.

6L50/6L80/6L90 - Automatic Transmission

DTC P0961-P0963

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0961

- Line Pressure Control (PC) Solenoid System Performance

DTC P0962

- Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

DTC P0963

- Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Diagnostic Fault Information

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2718

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2718

The line pressure control solenoid is part of the control solenoid valve assembly and is not serviced separately. The line pressure control solenoid

regulates the transmission fluid line pressure when the engine is running. The transmission control module varies the current to the normally high

line pressure control solenoid valve from 0.1 amp for maximum line pressure, to 1.1 amps for minimum line pressure. This is accomplished by

varying the current in order to obtain the desired line pressure in kPa (psi).

Conditions for Running the DTC

* The engine run time is greater than 5 seconds.

* The vehicle speed is less than 200 km/h (124 mph) for 5 seconds.

* The system voltage is 11-18 volts.

P0961

DTC P0961 is not failed this ignition.

P0962

DTC P0962 is not failed this ignition.

P0963

DTC P0963 is not failed this ignition.

Conditions for Setting the DTC

P0961

The transmission control module detects an internal electrical performance malfunction of the line pressure control solenoid control circuit and the

actual line pressure does not equal the commanded line pressure for 300 milliseconds.

P0962

The transmission control module detects an internal low voltage electrical malfunction of the line pressure control solenoid control circuit for 300

milliseconds.

P0963

The transmission control module detects an internal high voltage electrical malfunction of the line pressure control solenoid control circuit for 300

milliseconds.

Action Taken When the DTC Sets

DTC P0961

* DTC P0961 is a Type B DTC.

* The transmission control module freezes transmission adaptive functions.

DTC P0962

* DTC P0962 is a Type A DTC.

* The transmission control module defaults the transmission to 3rd gear.

* The transmission control module commands maximum line pressure.

* The transmission control module freezes transmission adaptive functions.

DTC P0963

* DTC P0963 is a Type A DTC.

* The transmission control module freezes transmission adaptive functions.

Conditions for Clearing the DTC

* DTC P0961 is a Type B DTC.

* DTCs P0962 and P0963 are Type A DTCs.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the transmission control module is warmed up and the transmission is operated long

enough to ensure a 3掳C (5掳F) increase in transmission control module temperature. This will place the transmission control module under the

optimal conditions to test solenoid electrical DTCs.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1098

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1098



Circuit Description



The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding



air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the



HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450



mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above



and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control



module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a



rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.



The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed



Loop earlier and the control module to calculate the air-to-fuel ratio sooner.



Conditions for Running the DTCs



* Before the ECM can report that DTC P0133, DTCs P0030, P0031, P0032, and P0135 must run and pass.



* DTC P0036, P0037, P0038, P0130, P0137, P0138, P0140, P0141, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0443, P0458,



P0459, P2096, P2097, P2177, P2178, P2179, P2787, P2088, P2089, P2090, P2232, P2235, P2270, P2271, P2272, or P2273 is not set.



* The engine speed is 1,200-3,000 RPM.



* The HO2S 1 is in Closed Loop.



* The engine load is 18-75 %.



* The exhaust gas temperature is greater than 300掳C (572掳F).



* The evaporative purge (EVAP) solenoid valve is commanded OFF or ON for greater than 10 s.



* These DTCs run continuously when the conditions above exist.



Conditions for Setting the DTCs



The ECM determines that the length of time for an HO2S 1 to switch from lean to rich and back to lean, which is called a switching cycle, has



exceeded a predetermined threshold. The condition exists for 3 cycles out of a 20 cycle test sample.



Action Taken when the DTCs Set



DTCs P0133, P013A, and P013E are Type B DTCs.



Conditions for Clearing the MIL/DTCs



DTCs P0133, P013A, and P013E are Type B DTCs.



Reference Information



Schematic Reference



Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2717

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2717

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.

Circuit/System Verification

1. Engine ON, verify the transmission fluid temperature is between 50-80掳C (122-176掳F).

2. Operate the vehicle long enough to verify at least a 3掳C (5掳F) rise in TCM temperature parameter, then operate the vehicle in Park for 5

seconds.

3. Engine ON, observe the scan tool Line PC Sol. CKT Status parameter. The reading should display OK or Indeterminate.

瀚慖f the reading is not within the specified range, replace the control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/2ML70 - Automatic Transmission/Control

Solenoid Valve and Transmission Control Module Assembly Inspection) for control solenoid inspection.

* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,

setup, and programming.

2ML70 - Automatic Transmission

DTC P0961-P0963

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0961

- Line Pressure Control (PC) Solenoid System Performance

DTC P0962

- Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

DTC P0963

- Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2716

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2716

P0962

DTC P0962 is not failed this ignition.

P0963

DTC P0963 is not failed this ignition.

Conditions for Setting the DTC

P0961

The transmission control module detects an internal electrical performance malfunction of the line pressure control solenoid control circuit and the

actual line pressure does not equal the commanded line pressure for 300 milliseconds.

P0962

The transmission control module detects an internal low voltage electrical malfunction of the line pressure control solenoid control circuit for 300

milliseconds.

P0963

The transmission control module detects an internal high voltage electrical malfunction of the line pressure control solenoid control circuit for 300

milliseconds.

Action Taken When the DTC Sets

DTC P0961

* DTC P0961 is a Type B DTC.

* The transmission control module freezes transmission adaptive functions.

DTC P0962

* DTC P0962 is a Type A DTC.

* The transmission control module defaults the transmission to 3rd gear.

* The transmission control module commands maximum line pressure.

* The transmission control module freezes transmission adaptive functions.

DTC P0963

* DTC P0963 is a Type A DTC.

* The transmission control module freezes transmission adaptive functions.

Conditions for Clearing the DTC

* DTC P0961 is a Type B DTC.

* DTCs P0962 and P0963 are Type A DTCs.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the transmission control module is warmed up and the transmission is operated long

enough to ensure a 3掳C (5掳F) increase in transmission control module temperature. This will place the transmission control module under the

optimal conditions to test solenoid electrical DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2715

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2715

* Line Pressure Control Solenoid Control Circuit Low Voltage Test

瀚慖f any test status parameter displays Fault or Malfunction, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

2ML70 - Automatic Transmission

DTC P0961-P0963

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0961

- Line Pressure Control (PC) Solenoid System Performance

DTC P0962

- Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

DTC P0963

- Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The line pressure control solenoid is part of the control solenoid valve assembly and is not serviced separately. The line pressure control solenoid

regulates the transmission fluid line pressure when the engine is running. The transmission control module varies the current to the normally high

line pressure control solenoid valve from 0.1 amp for maximum line pressure, to 1.1 amps for minimum line pressure. This is accomplished by

varying the current in order to obtain the desired line pressure in kPa (psi).

Conditions for Running the DTC

* The engine run time is greater than 5 seconds.

* The vehicle speed is less than 200 km/h (124 mph) for 5 seconds.

* The system voltage is 11-18 volts.

P0961

DTC P0961 is not failed this ignition.

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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1437



Reference Information



Schematic Reference



Cruise Control Schematics (See: Cruise Control/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Cruise Control Description and Operation (See: Cruise Control/Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Verify that DTC B3794 is not set.



瀚慖f DTC is set, refer to DTC B3794 (See: B Code Charts/B3794).



2. Road test the vehicle and attempt to engage cruise. Verify that cruise control engages properly and the DTC P0575 is not set.



瀚慖f DTC is set, replace the K9 BCM. Clear the DTC, road test the vehicle and attempt to engage cruise. If the DTC resets, replace the K20



ECM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM or ECM replacement, setup, and programming



Fuel Pump Control Module



DTC P0601-P0604, P0606, or P062F (Fuel Pump Control Module)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0601



- Control Module Read Only Memory (ROM)



DTC P0602



- Control Module Not Programmed

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2714

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2714

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Description and Operation

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

DT-47825-10 - Jumper Harness

Circuit/System Verification

1. Engine running in Park position. Move the gear shifter lever into each gear position and back into Park position. Verify with a scan tool the

following test status parameters display OK:

* Line Pressure Control Solenoid Performance Test Status

* Line Pressure Control Solenoid Control Circuit High Voltage Test Status

* Line Pressure Control Solenoid Control Circuit Low Voltage Test Status

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly

Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission and

Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve assembly

electrical connector.

5. Ignition ON, verify with a scan tool the following test status parameters display OK:

* Line Pressure Control Solenoid Performance Test Status

* Line Pressure Control Solenoid Control Circuit High Voltage Test Status

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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2713

Circuit/System Description

The line pressure control (PC) solenoid is part of the control solenoid valve assembly which has no serviceable parts. The normally high line PC

solenoid regulates and directs the PC solenoid oil pressure to the isolator/pressure regulator valve. Increasing PC solenoid line pressure increases

transmission line pressure. The TCM varies the current to the line PC solenoid through a low side driver. Decreasing the current to the line PC

solenoid increases line PC solenoid oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the line PC solenoid decreases

line PC oil pressure by opening the solenoid exhaust port. Line PC solenoid power is supplied by the TCM through a high side driver (HSD). The

HSD protects the circuit and components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault

is corrected the HSD will reset.

Conditions for Running the DTC

P0961, P0962, or P0963

* The engine speed is greater than 500 RPM for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* DTCs P0961, P0962 or P0963 are not set.

Conditions for Setting the DTC

P0961

The TCM detects an internal electrical malfunction of the line PC solenoid where the measured line PC solenoid current does not equal the

commanded line PC solenoid current for 5 seconds.

P0962

The TCM detects a short to ground or an open/high resistance on the line PC solenoid control circuit for 1 second.

P0963

The TCM detects a short to voltage on the line PC solenoid control circuit for 1 second.

Action Taken When the DTC Sets

P0961

* DTC P0961 is a Type A DTC.

* The TCM freezes transmission adaptive functions.

P0962

* DTC P0962 is a Type A DTC.

* The TCM turns the high side driver OFF.

* The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.

* The TCM inhibits the torque converter clutch (TCC).

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

P0963

* DTC P0963 is a Type C DTC.

* The TCM freezes transmission adaptive functions.

* The TCM commands maximum line pressure.

Conditions for Clearing the DIC/DTC

* DTCs P0961 and P0963 are Type C DTCs.

* DTC P0962 is a Type A DTC.

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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2712

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF. Remove the Q8 control solenoid valve assembly. Refer to Control Valve Body Assembly Removal (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/6L45/6L50/6L80/6L90 - Automatic Transmission/5. Control

Valve Body Assembly Removal).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect the DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve

assembly electrical connector.

5. Ignition ON, verify with a scan tool that each TFP switch parameters changes states when gently pushing on each TFP switch with the eraser

end of a pencil.

瀚慖f any TFP switch parameter does not change states, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

6L50/6L80/6L90 - Automatic Transmission

DTC P0961-P0963

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0961

- Line Pressure Control (PC) Solenoid System Performance

DTC P0962

- Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

DTC P0963

- Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2711

pressure state. The TCM counts each incident. The DTC sets when 18 counts are accumulated.

Action Taken When the DTC Sets

* DTCs P0877 and P0878 are Type C DTCs.

* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0877 and P0878 are Type C DTCs.

Diagnostic Aids

A TFP switch may malfunction due to normal debris in the transmission fluid causing a TFP Switch DTC to intermittently set. This type of

condition should not be immediately noticeable to a customer, as the switch outputs are used for shift adaptive pressure and do not cause

transmission symptoms unless the switch malfunctions continuously for an extended period of time.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Description and Operation

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

DT-47825-10 - Jumper Harness

Circuit/System Verification

1. Engine idling in Park with parking brake applied, and drive wheels chocked.

2. Monitor the Transmission Fluid Pressure Switch 1, Transmission Fluid Pressure Switch 3, Transmission Fluid Pressure Switch 4, and

Transmission Fluid Pressure Switch 5 parameters with a scan tool.

3. Place the gear select lever in Park, Reverse, and Neutral range. Verify the TFP switch parameter states are correct for each range. Refer to

Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical Specifications/Automatic Transmission/Transaxle/System

Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Fluid Pressure Switch Logic).

4. Place the gear select lever in Drive range. Command the shift transmission with a scan tool through all forward ranges. Verify the TFP switch

parameter states are correct for each range. Refer to Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical

Specifications/Automatic Transmission/Transaxle/System Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission

Fluid Pressure Switch Logic).

5. Operate the vehicle within the conditions for running the DTC to verify the TDC does not reset. You may also operate the vehicle within the

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1263

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1263



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Engine at operating temperature, all accessories OFF. Engine speed greater than 2,000 RPM, observe the appropriate scan tool knock sensor



signal voltage parameter. The voltage should be greater than 4.0 V.



2. Engine idling, move the related harnesses and connectors for the knock sensor circuits while observing the scan tool knock sensor signal



voltage parameters. The voltage should remain steady with no abrupt changes.



3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the



conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the appropriate B68 knock sensor.



Note: If the voltage is not within the specified range on either circuit, test for a wire to wire short, short to ground, or short to voltage



between the knock sensor circuits.



2. Ignition ON, test for 2-3 V between the signal circuit terminal A or 1 and ground.



瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuits/connections test



normal, replace the K20 ECM.



瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the K20



ECM.



3. Test for 2-3 V between the low reference circuit terminal B or 2 and ground.



瀚慖f less than the specified range, test the low reference circuit for a short to ground or an open/high resistance. If the circuits/connections



test normal, replace the K20 ECM.



瀚慖f greater than the specified range, test the low reference circuit for a short to voltage. If the circuits/connections test normal, replace the



K20 ECM.



4. If all circuits/connections test normal, test or replace the appropriate B68 knock sensor.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Knock Sensor Replacement - Bank 1 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and



Repair/Knock Sensor Replacement - Bank 1)



* Knock Sensor Replacement - Bank 2 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and



Repair/Knock Sensor Replacement - Bank 2)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for Engine Control Module replacement, setup, and



programming.



P0327



DTC P0326, P0327, P0328, P0331, P0332, or P0333 (LAU)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2710

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2710

DTC P0877 or P0878

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0877

- Transmission Fluid Pressure (TFP) Switch 4 Circuit Low Voltage

DTC P0878

- Transmission Fluid Pressure (TFP) Switch 4 Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The transmission fluid pressure (TFP) switch 4 is part of the control solenoid valve assembly which has no serviceable parts. The TCM supplies a

signal circuit to the TFP switch 4. The TFP switch 4 has an internal case ground. TFP switch 4 is normally closed or LOW. When oil pressure is

present at the TFP switch 4, the switch is open or HIGH. The normally LOW pressure control solenoid 5 controls pressure to the 1-2-3-4 clutch

regulator valve. The TCM monitors the TFP switch 4 to determine the position of the 1-2-3-4 clutch regulator valve. When the 1-2-3-4 clutch is

commanded OFF, pressure is present on the TFP switch 4. When the 1-2-3-4 clutch is commanded ON, the 1-2-3-4 clutch regulator valve moves

and pressure to the TFP switch is exhausted through the 1-2-3-4 clutch regulator valve.

Conditions for Running the DTC

P0877 or P0878

* DTCs P0711, P0712, P0713, P0973, P0974, P0976, P0977, P1915, or P182E are not set.

* Ignition voltage is 8.6 volts or greater.

* The transmission fluid temperature (TFT) is 0-120掳C (32-248掳F).

* Engine speed is 500 RPM or greater for 5 seconds.

Conditions for Setting the DTC

P0877

The TCM detects that the TFP switch 4 signal voltage remains LOW after the 1-2-3-4 clutch transitions from a HIGH pressure state to a LOW

pressure state. The TCM counts each incident. The DTC sets when 20 counts are accumulated.

P0878

The TCM detects that the TFP switch 4 signal voltage remains HIGH after the 1-2-3-4 clutch transitions from a LOW pressure state to a HIGH

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2709

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2709

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Description and Operation

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

DT-47825-10 - Jumper Harness

Circuit/System Verification

1. Engine idling in Park with parking brake applied, and drive wheels chocked.

2. Monitor the Transmission Fluid Pressure Switch 1, Transmission Fluid Pressure Switch 3, Transmission Fluid Pressure Switch 4, and

Transmission Fluid Pressure Switch 5 parameters with a scan tool.

3. Place the gear select lever in Park, Reverse, and Neutral range. Verify the TFP switch parameter states are correct for each range. Refer to

Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical Specifications/Automatic Transmission/Transaxle/System

Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Fluid Pressure Switch Logic).

4. Place the gear select lever in Drive range. Command the shift transmission with a scan tool through all forward ranges. Verify the TFP switch

parameter states are correct for each range. Refer to Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical

Specifications/Automatic Transmission/Transaxle/System Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission

Fluid Pressure Switch Logic).

5. Operate the vehicle within the conditions for running the DTC to verify the TDC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF. Remove the Q8 control solenoid valve assembly. Refer to Control Valve Body Assembly Removal (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/6L45/6L50/6L80/6L90 - Automatic Transmission/5. Control

Valve Body Assembly Removal).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect the DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve

assembly electrical connector.

5. Ignition ON, verify with a scan tool that each TFP switch parameters changes states when gently pushing on each TFP switch with the eraser

end of a pencil.

瀚慖f any TFP switch parameter does not change states, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2708

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2708

Circuit/System Description

The transmission fluid pressure (TFP) switch 4 is part of the control solenoid valve assembly which has no serviceable parts. The TCM supplies a

signal circuit to the TFP switch 4. The TFP switch 4 has an internal case ground. TFP switch 4 is normally closed or LOW. When oil pressure is

present at the TFP switch 4, the switch is open or HIGH. The normally LOW pressure control solenoid 5 controls pressure to the 1-2-3-4 clutch

regulator valve. The TCM monitors the TFP switch 4 to determine the position of the 1-2-3-4 clutch regulator valve. When the 1-2-3-4 clutch is

commanded OFF, pressure is present on the TFP switch 4. When the 1-2-3-4 clutch is commanded ON, the 1-2-3-4 clutch regulator valve moves

and pressure to the TFP switch is exhausted through the 1-2-3-4 clutch regulator valve.

Conditions for Running the DTC

P0877 or P0878

* DTCs P0711, P0712, P0713, P0973, P0974, P0976, P0977, P1915, or P182E are not set.

* Ignition voltage is 8.6 volts or greater.

* The transmission fluid temperature (TFT) is 0-120掳C (32-248掳F).

* Engine speed is 500 RPM or greater for 5 seconds.

Conditions for Setting the DTC

P0877

The TCM detects that the TFP switch 4 signal voltage remains LOW after the 1-2-3-4 clutch transitions from a HIGH pressure state to a LOW

pressure state. The TCM counts each incident. The DTC sets when 20 counts are accumulated.

P0878

The TCM detects that the TFP switch 4 signal voltage remains HIGH after the 1-2-3-4 clutch transitions from a LOW pressure state to a HIGH

pressure state. The TCM counts each incident. The DTC sets when 18 counts are accumulated.

Action Taken When the DTC Sets

* DTCs P0877 and P0878 are Type C DTCs.

* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0877 and P0878 are Type C DTCs.

Diagnostic Aids

A TFP switch may malfunction due to normal debris in the transmission fluid causing a TFP Switch DTC to intermittently set. This type of

condition should not be immediately noticeable to a customer, as the switch outputs are used for shift adaptive pressure and do not cause

transmission symptoms unless the switch malfunctions continuously for an extended period of time.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2707

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2707

Fluid Pressure Switch Logic).

5. Operate the vehicle within the conditions for running the DTC to verify the TDC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF. Remove the Q8 control solenoid assembly. Refer to Control Valve Body Assembly Removal (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/6L45/6L50/6L80/6L90 - Automatic Transmission/5. Control

Valve Body Assembly Removal).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect the DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve

assembly electrical connector.

5. Ignition ON, verify with a scan tool that each TFP switch parameter changes states when gently pushing on each TFP switch with the eraser

end of a pencil.

瀚慖f any TFP switch parameter does not change states, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

P0877

DTC P0877 or P0878

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0877

- Transmission Fluid Pressure (TFP) Switch 4 Circuit Low Voltage

DTC P0878

- Transmission Fluid Pressure (TFP) Switch 4 Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1506

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1506



DTC P0651



- 5 V Reference 2 Circuit



DTC P0652



- 5 V Reference 2 Circuit Low Voltage



DTC P0653



- 5 V Reference 2 Circuit High Voltage



DTC P0697



- 5 V Reference 3 Circuit



DTC P0698



- 5 V Reference 3 Circuit Low Voltage



DTC P0699



- 5 V Reference 3 Circuit High Voltage



Circuit/System Description



The engine control module (ECM) has 3 internal 5 V reference circuits. Each internal reference circuit provides external 5 V reference circuits for



more than one sensor. A short to ground or short to voltage on one external 5 V reference circuit can affect all the components connected to the



same internal 5 V reference circuit.



Conditions for Running the DTC



* The ignition is ON for greater than 3 s.



* DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 run continuously when the above condition is met.



Conditions for Setting the DTC



The 5 V reference circuit voltage is above or below a predetermined threshold for greater than 1 s or for a cumulative of 10 s.



Action Taken When the DTC Sets



DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.



Conditions for Clearing the DTC



DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.



Diagnostic Aids



The 5 V reference 1, 2, and 3 circuits provide 5 V to the following sensors:



P0641, P0642, and P0643



* Economy mode switch



* Turbocharger pressure sensor



* Secondary air injection (AIR) pressure sensor



* Engine oil pressure (EOP) sensor



* Fuel tank pressure sensor



P0651, P0652, and P0653



* All four camshaft position sensors



* Accelerator pedal position (APP) sensor 1



P0697, P0698, and P0699



* Throttle position sensor 1 and 2



* Crankshaft position sensor



* Accelerator pedal position (APP) sensor 2



* A/C refrigerant pressure sensor



It may be possible to locate the fault by disconnecting one component at a time from the 5 V reference circuit while viewing the 5 V Reference



Circuit parameter on the scan tool. The scan tool parameter will change from Malfunction to OK when the source of the fault is disconnected. If all



5 V reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2706

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2706

The TCM detects that the TFP switch 3 signal voltage remains HIGH after the 2-6 clutch transitions from a LOW pressure state to a HIGH pressure

state. The TCM counts each incident. The DTC sets when 18 counts are accumulated.

Action Taken When the DTC Sets

* DTCs P0872 and P0873 are Type C DTCs.

* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0872 and P0873 are Type C DTCs.

Diagnostic Aids

A TFP switch may malfunction due to normal debris in the transmission fluid causing a TFP Switch DTC to intermittently set. This type of

condition should not be immediately noticeable to a customer, as the switch outputs are used for shift adaptive pressure and do not cause

transmission symptoms unless the switch malfunctions continuously for an extended period of time.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Description and Operation

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

DT-47825-10 - Jumper Harness

Circuit/System Verification

1. Engine idling in Park with parking brake applied, and drive wheels chocked.

2. Monitor the Transmission Fluid Pressure Switch 1, Transmission Fluid Pressure Switch 3, Transmission Fluid Pressure Switch 4, and

Transmission Fluid Pressure Switch 5 parameters with a scan tool.

3. Place the gear select lever in Park, Reverse, and Neutral range. Verify the TFP switch parameter states are correct for each range. Refer to

Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical Specifications/Automatic Transmission/Transaxle/System

Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Fluid Pressure Switch Logic).

4. Place the gear select lever in Drive range. Command the shift transmission with a scan tool through all forward ranges. Verify the TFP switch

parameter states are correct for each range. Refer to Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical

Specifications/Automatic Transmission/Transaxle/System Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2705

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2705

P0873

DTC P0872 or P0873

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0872

- Transmission Fluid Pressure (TFP) Switch 3 Circuit Low Voltage

DTC P0873

- Transmission Fluid Pressure (TFP) Switch 3 Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The transmission fluid pressure (TFP) switch 3 is part of the control solenoid valve assembly which has no serviceable parts. The TCM supplies a

signal circuit to the TFP switch 3. The TFP switch 3 has an internal case ground. TFP switch 3 is normally closed or LOW. When oil pressure is

present at the TFP switch 3, the switch is open or HIGH. The normally low clutch pressure control (PC) solenoid 4 controls pressure to the 2-6

clutch regulator valve. The TCM monitors the TFP switch 3 to determine the position of the 2-6 clutch regulator valve. When the 2-6 clutch is

commanded OFF, pressure is present on the TFP switch 3. When the 2-6 clutch is commanded ON, the 2-6 clutch regulator valve moves and

pressure is exhausted through the 2-6 clutch regulator valve.

Conditions for Running the DTC

P0872 or P0873

* DTCs P0711, P0712, P0713, P0973, P0974, P0976, P0977, P1915, or P182E are not set.

* Ignition voltage is 8.6 volts or greater.

* The transmission fluid temperature (TFT) is 0-120掳C (32-248掳F).

* Engine speed is 500 RPM or greater for 5 seconds.

Conditions for Setting the DTC

P0872

The TCM detects that the TFP switch 3 signal voltage remains LOW after the 2-6 clutch transitions from a HIGH pressure state to a LOW pressure

state. The TCM counts each incident. The DTC sets when 20 counts are accumulated.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2704

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2704

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Description and Operation

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

DT-47825-10 - Jumper Harness

Circuit/System Verification

1. Engine idling in Park with parking brake applied, and drive wheels chocked.

2. Monitor the Transmission Fluid Pressure Switch 1, Transmission Fluid Pressure Switch 3, Transmission Fluid Pressure Switch 4, and

Transmission Fluid Pressure Switch 5 parameters with a scan tool.

3. Place the gear select lever in Park, Reverse, and Neutral range. Verify the TFP switch parameter states are correct for each range. Refer to

Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical Specifications/Automatic Transmission/Transaxle/System

Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Fluid Pressure Switch Logic).

4. Place the gear select lever in Drive range. Command the shift transmission with a scan tool through all forward ranges. Verify the TFP switch

parameter states are correct for each range. Refer to Transmission Fluid Pressure Switch Logic (See: Specifications/Mechanical

Specifications/Automatic Transmission/Transaxle/System Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission

Fluid Pressure Switch Logic).

5. Operate the vehicle within the conditions for running the DTC to verify the TDC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF. Remove the Q8 control solenoid assembly. Refer to Control Valve Body Assembly Removal (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/6L45/6L50/6L80/6L90 - Automatic Transmission/5. Control

Valve Body Assembly Removal).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6L45/6L50/6L80/6L90 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect the DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve

assembly electrical connector.

5. Ignition ON, verify with a scan tool that each TFP switch parameter changes states when gently pushing on each TFP switch with the eraser

end of a pencil.

瀚慖f any TFP switch parameter does not change states, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2703

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2703

Typical Scan Tool Data

Circuit/System Description

The transmission fluid pressure (TFP) switch 3 is part of the control solenoid valve assembly which has no serviceable parts. The TCM supplies a

signal circuit to the TFP switch 3. The TFP switch 3 has an internal case ground. TFP switch 3 is normally closed or LOW. When oil pressure is

present at the TFP switch 3, the switch is open or HIGH. The normally low clutch pressure control (PC) solenoid 4 controls pressure to the 2-6

clutch regulator valve. The TCM monitors the TFP switch 3 to determine the position of the 2-6 clutch regulator valve. When the 2-6 clutch is

commanded OFF, pressure is present on the TFP switch 3. When the 2-6 clutch is commanded ON, the 2-6 clutch regulator valve moves and

pressure is exhausted through the 2-6 clutch regulator valve.

Conditions for Running the DTC

P0872 or P0873

* DTCs P0711, P0712, P0713, P0973, P0974, P0976, P0977, P1915, or P182E are not set.

* Ignition voltage is 8.6 volts or greater.

* The transmission fluid temperature (TFT) is 0-120掳C (32-248掳F).

* Engine speed is 500 RPM or greater for 5 seconds.

Conditions for Setting the DTC

P0872

The TCM detects that the TFP switch 3 signal voltage remains LOW after the 2-6 clutch transitions from a HIGH pressure state to a LOW pressure

state. The TCM counts each incident. The DTC sets when 20 counts are accumulated.

P0873

The TCM detects that the TFP switch 3 signal voltage remains HIGH after the 2-6 clutch transitions from a LOW pressure state to a HIGH pressure

state. The TCM counts each incident. The DTC sets when 18 counts are accumulated.

Action Taken When the DTC Sets

* DTCs P0872 and P0873 are Type C DTCs.

* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0872 and P0873 are Type C DTCs.

Diagnostic Aids

A TFP switch may malfunction due to normal debris in the transmission fluid causing a TFP Switch DTC to intermittently set. This type of

condition should not be immediately noticeable to a customer, as the switch outputs are used for shift adaptive pressure and do not cause

transmission symptoms unless the switch malfunctions continuously for an extended period of time.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Technical Service Bulletin # 03-08-98-002B Date: 100630

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Technical Service Bulletin # 03-08-98-002B Date: 100630



Body - Squeeze Type Resistance Spot Welding/Equipment



INFORMATION



Bulletin No.: 03-08-98-002B



Date: June 30, 2010



Subject: Squeeze Type Resistance Spot Welding/Equipment



Models:



2011 and Prior Passenger Cars and Trucks (Including Saturn)



2003-2010 HUMMER H2, H3



2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 236



Supercede:



This bulletin is being revised to add model years. Please discard Corporate Bulletin Number 03-08-98-002A (Section 08 - Body and Accessories).



This bulletin provides guidelines for repair shops that wish to use squeeze type resistance spot welding (or simply, spot welding) as an alternative to



MIG plug welding when performing collision repair procedures. The process of spot welding for attaching body panels and components has been



around for many years and is similar to the production welding process used in assembly plants. Spot welding may be applicable in similar



situations that are currently MIG plug welded.



The following are some of the benefits of spot welding:



- Less heat or burn damage



- Less damage to corrosion protection



- Drilling of holes not required



- Replication of the production weld appearance



Applicable components for this technology may be panels or components with flanges that are accessible with arms and tips supplied by the



equipment manufacturer. Welds from this equipment should be applied on a one-for-one basis, next to the production welds.



Here are some of the important factors in proper welding with this equipment.



Important



Proper use and safety training for each user of the equipment is a must.



- Use equipment from companies that are able to produce welds that meet industry standards for size and strength.



Equipment most likely to meet those standards at this time would be "inverter" technology and include the following suppliers (other



suppliers may have comparable equipment):



- Pro Spot (PR2000)



- Elektron (M100)



- Blackhawk (WEL700)



- Car-O-Liner (CR500)



For specific information about this and other equipment, call GM Dealer Equipment.



- Ensure that the building power source is capable of meeting the equipment manufacturer's power requirement specifications.



For example, fuse 60 amp, 208-230 V single or 3-phase, using supply wire of sufficient gauge to carry the current load. Consult with a



qualified electrician for wiring assistance.



- Prepare and perform sample welds for destructive testing made from similar materials. Perform this operation for each vehicle repaired and



prior to actual repair.



- Proper equipment maintenance



- Proper weld tip alignment and maintenance



- Ensure that metal flanges are clean and conform to each other



A more complete description of these practices and standards can be found in the following publications:



- SAE J-2667, Surface Vehicles Recommended Practice, http://www.sae.org



- AWS D8.7-88, Recommended Practices Automotive Weld Quality - Resistance Spot Welding, http://www.aws.org/w/a/



- AWS D8.9-97, Recommended Practices for Test Methods for Evaluating the Resistance Spot Welding Behavior of Automotive Sheet Steels,