Wednesday, July 31, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 694


3. Test for greater than 9 volts between the signal circuit terminal C and ground while commanding the rear window DOWN by using the



window switch on the driver master control.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the



BCM.



4. If all circuits test normal, replace the rear window switch.



Repair Instructions



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



* Rear Side Door Window Switch Replacement (See: Windows and Glass/Windows/Service and Repair/Rear Side Door Window Switch



Replacement)



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



B3824



DTC B3821 or B3824



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 B3821 00



- Left Rear Window Relay Power Circuit



DTC B3824 00



- Right Rear Window Relay Power Circuit



Diagnostic Fault Information

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 714


* Front vertical motor terminal 13



* Rear vertical motor terminal 15



* Rear vertical motor terminal 16



* Seat horizontal motor terminal 9



* Seat horizontal motor terminal 10



锟斤拷 If not the specified value, test the control circuit for a short to ground.



4. Ignition OFF, disconnect the X4 harness connector at the MSM.



5. Ignition ON, verify that a test lamp does not illuminate between the control circuits listed below and ground:



* Lumbar horizontal motor terminal 12



* Lumbar horizontal motor terminal 13



* Seat recline motor terminal 15



* Seat recline motor terminal 16



* Adjustable pedal actuator terminal 9



* Adjustable pedal actuator terminal 10



锟斤拷 If the test lamp illuminates, test the control circuit for a short to voltage.



6. Test for infinite resistance between the control circuits listed below and ground:



* Lumbar horizontal motor terminal 12



* Lumbar horizontal motor terminal 13



* Seat recline motor terminal 15



* Seat recline motor terminal 16



* Adjustable pedal actuator terminal 9



* Adjustable pedal actuator terminal 10



锟斤拷 If not the specified value, test the control circuit for a short to ground.



7. If all circuits test normal, replace the MSM.



B3921 01 or B3921 02



1. Ignition OFF, disconnect the X4 harness connector at the MSM.



2. Ignition ON, verify that a test lamp does not illuminate between the control circuits listed below and ground:



* Lumbar vertical motor terminal 1



* Lumbar vertical motor terminal 2



* Steering wheel tilt actuator terminal 7



* Steering wheel tilt actuator terminal 8



锟斤拷 If the test lamp illuminates, test the control circuit for a short to voltage.



3. Test for infinite resistance between the control circuits listed below and ground:



* Lumbar vertical motor terminal 1



* Lumbar vertical motor terminal 2



* Steering wheel tilt actuator terminal 7



* Steering wheel tilt actuator terminal 8



锟斤拷 If not the specified value, test the control circuit for a short to ground.



4. If all circuits test normal, replace the MSM.



Repair Instructions



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



* Front Seat Adjuster Replacement (with HP2) ()Front Seat Adjuster Replacement (without HP2) ()



* Front Seat Recliner Actuator Motor Replacement ()



* Seat Lumbar Sub System Replacement ()



* Brake Pedal Assembly Replacement (See: Accessories and Optional Equipment/Pedal Positioning System/Service and Repair/Removal and



Replacement/Brake Pedal Assembly Replacement)



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

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 307


A short to ground is detected on the specified (+) or (-) signal circuit



DTC B1025 04, B1035 04, B1045 04, B1055 04, B1065 04, B1075 04, B1085 04, B1095 04



An open is detected on the specified (+) or (-) signal circuit



Action Taken When the DTC Sets



No sound is present from one or more of the speakers.



Conditions for Clearing the DTC



Set by Radio



The fault condition becomes history if not present for 0.25 seconds.



Set by Bose Amplifier



The fault condition becomes history after the vehicle ignition has been OFF for several hours and then the ignition turns ON.



Diagnostic Aids



Speakers located in the front A-pillar are connected to the same channel as the speaker in the door. A DTC will only set after the amplifier only on



up-level radios.



Reference Information



Schematic Reference



Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System



Schematics)



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)



Scan Tool Reference



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



Circuit/System Verification



Radio ON, adjust the fade and balance controls on the radio to test all four channels individually. Each of the four channels should produce clear and



even sound.



Circuit/System Testing



Important: This DTC can be set by either the radio or the amplifier. If the DTC was set by the radio, diagnose the appropriate audio output



circuits to the speakers or the low level inputs to the amplifier (if equipped). If the DTC was set by the amplifier, diagnose audio output



signals to the speakers from the amplifier. If equipped with rear seat audio (RSA) (U42), the RSA must be turned off to perform proper



speaker testing.



Without Amplifier



1. Ignition OFF, disconnect the harness connector at the appropriate speaker.



2. Radio ON, test for 5.0-7.5 volts between the signal circuit terminal A and ground.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



radio.



3. Test for 5.0-7.5 volts between the signal circuit terminal B and ground.

Tuesday, July 30, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 345


- Audio Output 3 Left Rear Circuit Open



DTC B1055 01



- Audio Output 4 Right Rear Circuit Short to Battery



DTC B1055 02



- Audio Output 4 Right Rear Circuit Short to Ground



DTC B1055 04



- Audio Output 4 Right Rear Circuit Open



DTC B1065 01



- Audio Output 5 Circuit Short to Battery (Center IP)



DTC B1065 02



- Audio Output 5 Circuit Short to Ground (Center IP)



DTC B1065 04



- Audio Output 5 Circuit Open (Center IP)



DTC B1075 01



- Audio Output 6 Circuit Short to Battery (Subwoofer)



DTC B1075 02



- Audio Output 6 Circuit Short to Ground (Subwoofer)



DTC B1075 04



- Audio Output 6 Circuit Open (Subwoofer)



DTC B1085 01



- Audio Output 7 Circuit Short to Battery (LR D-Pillar)



DTC B1085 02



- Audio Output 7 Circuit Short to Ground (LR D-Pillar)



DTC B1085 04



- Audio Output 7 Circuit Open (LR D-Pillar)



DTC B1095 01



- Audio Output 8 Circuit Short to Battery (RR D-Pillar)



DTC B1095 02



- Audio Output 8 Circuit Short to Ground (RR D-Pillar)



DTC B1095 04



- Audio Output 8 Circuit Open (RR D-Pillar)



Diagnostic Fault Information



Circuit/System Description



Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier have a DC bias voltage that is one half of the battery voltage.



When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 704


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 B3891 02



- Trailer Fog Lamps Circuit Short to Ground



DTC B3891 05



- Trailer Fog Lamps Circuit Short to Battery or Open



Diagnostic Fault Information



Circuit/System Description



When the rear fog lamp switch is placed in the ON position, ground is applied to the auxiliary body control module (XBCM) through the rear fog



lamp switch circuit. The XBCM then applies voltage on the trailer fog lamp circuit to the trailer rear fog lamp.



Conditions for Running the DTC



The ignition is ON. Park lamps must be ON and the rear fog lamps must be commanded ON.



Conditions for Setting the DTC



The body control module (BCM) detects an open, short to ground, or short to voltage on the trailer rear fog lamp circuit while trying to apply a



voltage to the circuit.



Action Taken When the DTC Sets



The trailer rear fog lamps do not illuminate.



Conditions for Clearing the DTC



* The conditions for setting the DTC are no longer present.



* A history DTC clears after 100 malfunction-free ignition cycles.



* The BCM receives the clear code command from the scan tool.



Reference Information



Schematic Reference



Fog Lights Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System Diagram/Fog Lights Schematics)



Connector End View Reference



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



Description and Operation



Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting Systems 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

Monday, July 29, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 240


The air temperature sensors are a 2-wire negative temperature co-efficient thermistor. The vehicle uses the following air temperature sensors:



* Ambient Air Temperature Sensor



* Inside Air Temperature Sensor Assembly



* Upper Left Air Temperature Sensor



* Upper Right Air Temperature Sensor



* Lower Left Air Temperature Sensor



* Lower Right Air Temperature Sensor



* Upper Auxiliary Air Temperature Sensor



* Lower Auxiliary Air Temperature Sensor



* Auxiliary Inside Air Temperature Sensor



A signal and low reference circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance



decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40 to +101锟斤拷C



(-40 to +215锟斤拷F). The sensor signal varies between 0-5 volts. The HVAC control module converts the signal to a range between 0-255 counts. As the



air temperature increases the count value will decrease. If the HVAC control module or auxiliary HVAC control module detects a malfunctioning



sensor, then the control module software will use a defaulted air temperature value. The default value for the ambient and inside air temperature



sensors will be displayed on the scan tool. The default value for the duct air temperature sensors will not be displayed on the scan tool. The scan tool



parameter for the duct air temperature sensors are the actual state of the signal circuit. The default action ensures that the HVAC system can adjust



the inside air temperature near the desired temperature until the condition is corrected.



Diagnostic Aids



Conditions for Running the DTC



Ignition ON.



Conditions for Setting the DTC



The HVAC control module detects the temperature sensor signal circuit is less than -36锟斤拷C (-38锟斤拷F) or greater than 215锟斤拷C (419锟斤拷F) for greater than 15



seconds.



Action Taken When the DTC Sets



The system operates using a default value.



Conditions for Clearing the DTC



* The DTC will become history if the HVAC control module no longer detects the condition that set the DTC.



* The history DTC will clear after 100 fault-free ignition cycles.



Reference Information



Schematic Reference



HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams/HVAC - Automatic)



Connector End View Reference



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



Description and Operation

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 323


6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.



7. Disconnect the X2 harness connector at the amplifier.



8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.



* Left rear low level audio signal (+) - terminal 15



* Left rear low level audio signal (-) - terminal 14



* Right rear low level audio signal (+) - terminal 16



* Right rear low level audio signal (-) - terminal 8



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



rear seat audio (RSA) module.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)



module.



9. If all circuits test normal, replace the amplifier.



DTC Set by Audio Amplifier UQA



1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.



2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:



* Left front speaker output (+) - terminal 4 X2



* Left front speaker output (-) - terminal 3 X2



* Right front speaker output (+) - terminal 2 X2



* Right front low speaker output (-) - terminal 1 X2



* Left rear speaker output (+) - terminal 8 X2



* Left rear speaker output (-) - terminal 7 X2



* Right rear speaker output (+) - terminal 6 X2



* Right rear speaker output (-) - terminal 5 X2



* Left or rear subwoofer speaker output (+) - terminal 7 X1



* Left or rear subwoofer speaker output (-) - terminal 3 X1



* Right subwoofer speaker output (+) - terminal 6 X1



* Right subwoofer speaker output (-) - terminal 2 X1



锟斤拷 If greater than the specified range, test both circuits of the affected speaker for a short to voltage.



3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:



* Left front speaker output (+) - terminal 4 X2



* Left front speaker output (-) - terminal 3 X2



* Right front speaker output (+) - terminal 2 X2



* Right front low speaker output (-) - terminal 1 X2



* Left rear speaker output (+) - terminal 8 X2



* Left rear speaker output (-) - terminal 7 X2



* Right rear speaker output (+) - terminal 6 X2



* Right rear speaker output (-) - terminal 5 X2



* Left or rear subwoofer speaker output (+) - terminal 7 X1



* Left or rear subwoofer speaker output (-) - terminal 3 X1



* Right subwoofer speaker output (+) - terminal 6 X1



* Right subwoofer speaker output (-) - terminal 2 X1



锟斤拷 If less than the specified value, test both circuits of the affected speaker for a short to ground.



4. If all circuits test normal, reconnect all harness connectors at the amplifier.



5. Ignition ON, radio ON, disconnect the appropriate speaker.



6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.



锟斤拷 If less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.



锟斤拷 If greater then the specified range test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.



7. If the circuit tests normal, replace the appropriate speaker.



DTC Set by Audio Amplifier UQA with Y91 or UQS



1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.



2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:



* Left front speaker output (+) - terminal 4 X2



* Left front speaker output (-) - terminal 5 X2



* Right front speaker output (+) - terminal 7 X2



* Right front speaker output (-) - terminal 6 X2

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 510


Circuit/System Description



When the heated seat function is active, the heated seat module (HSM) supplies battery voltage through the element supply voltage circuit to the seat



heater elements. The HSM controls the seat temperature by providing a pulse width modulated (PWM) ground through the heated seat element



control circuit to the seat heater elements. The HSM then monitors the current flow through the heating element and the temperature sensor rate of



change to verify correct operation.



Conditions for Running the DTC



The HSM must be powered and the heated seat must be enabled.



Conditions for Setting the DTC



B2425 04 or B2430 04



The HSM does not detect a temperature change within 210 seconds.



B2425 0A or B2430 0A



The HSM detects that the set point temperature has not been reached within 8.5 minutes.



B2425 0B, B2425 0E, B2430 0B, or B2430 0E



By measuring output current, the HSM calculates that the heating element resistance is below the minimum resistance.



B2425 0C, B2445 0D, B2430 0C, or B2430 0D



By measuring output current, the HSM calculates that the heating element resistance is above the maximum resistance.



B2425 1F or B2430 1F



The temperature sensor voltage is erratic or changes suddenly.

Sunday, July 28, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 508


4. Test for 2.0 - 8.0 Ohms between control circuit terminal 14 and control circuit terminal 11.



锟斤拷 If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater



element.



锟斤拷 If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal replace the seat cushion



heater element.



5. Disconnect the X2, X5 harness connectors at the MSM.



6. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 1 X5 and the low reference circuit terminal 3 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



cushion heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat cushion heater element/temperature sensor.



7. Connect the X1, X2, X5 harness connectors at the MSM.



8. Disconnect the harness connector at the seat cushion heater element/temperature sensor.



9. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



MSM.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.



10. If all circuits test normal, replace the MSM.



B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F



1. Ignition OFF, disconnect the X3 harness connector at the MSM.



2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.



3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the X1, X4 harness connectors at the MSM.



Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat



unoccupied, then with the seat occupied.



4. Test for 2.0 - 8.0 Ohms between control circuit terminal 6 X1 and control circuit terminal 14 X4.



锟斤拷 If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater



element.



锟斤拷 If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal replace the seat cushion



heater element.



5. Disconnect the X2, X5 harness connectors at the MSM.



6. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 2 X5 and the low reference circuit terminal 6 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



cushion heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat cushion heater element/temperature sensor.



7. Connect the X1, X2, X4, X5 harness connectors at the MSM.



8. Disconnect the harness connector at the seat cushion heater element/temperature sensor.



9. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



MSM.



10. If all circuits test normal, replace the MSM.



Repair Instructions



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



* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)



()



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

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 168


and the sector switch will be active during the power cinch function. Each of the latch switch signal circuits are supplied battery voltage through a



resistor and monitored within the LGM. The latch switches share a common low reference circuit from the LGM and when the switch contacts close



the signal circuit goes low and the LGM determines the switch to be active. The full open switch is a limit switch mounted on the gear motor



assembly alongside the swing arm gear. The full open switch signal circuit is supplied battery voltage through a resistor and monitored within the



LGM. When the liftgate reaches the full open position, the switch signal circuit is closed to the low reference circuit and the signal circuit voltage



goes low.



Conditions for Running the DTC



The system voltage is 9-16 volts.



Conditions for Setting the DTC



B153A 00



The LGM detects a fault in any of the following switch signal circuits:



* Ratchet switch



* Pawl switch



* Sector switch



B153A 08



When the LGM detects a loss of B+ voltage, an open/high resistance in the sensor signal circuit, an open/high resistance in the liftgate latch low



reference circuit, or any incorrect combination of signals from the following switch inputs:



* Ratchet switch



* Pawl switch



* Sector switch



Action Taken When the DTC Sets



* Power open will be disabled.



* The latch may be inoperative or not function normally.



Conditions for Clearing the DTC



* The DTC will be current for as long as the fault is present.



* When the fault is no longer present, the DTC will be a history DTC.



* A history DTC will clear after 50 ignition cycles.



Diagnostic Aids



DTC B153A may be set when the vehicle is driven while the liftgate is open, as when the owner transports a large package in the rear of the vehicle.



The DTC will become history after the liftgate is closed and does not affect normal liftgate operation.



Note: Before testing can be performed the liftgate must be opened. Refer to Opening the Liftgate Without Electrical Power (See: Body and



Frame/Doors, Hood and Trunk/Trunk / Liftgate/Service and Repair/Procedures) for the appropriate procedure.



Whenever the LGM loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the LGM.



Reference Information



Schematic Reference



Liftgate Schematics (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/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

Saturday, July 27, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 619


* 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 B2870 01



- Tilt Up Switch Circuit Short to Battery



DTC B2875 01



- Tilt Down Switch Circuit Short to Battery



Diagnostic Fault Information



Circuit Description



The memory seat module (MSM) receives voltage inputs from the tilt switch based on the position of the switch. The MSM then supplies battery



voltage and a ground to the tilt motor control circuits depending on which direction of movement is requested.



Conditions for Running the DTC



The ignition ON.



Conditions for Setting the DTC



The MSM detects a tilt switch input for more than 30 consecutive seconds after the tilt motor movement has stopped.



Action Taken When the DTC Sets



* The tilt motor will be deactivated.



* Memory recall functions will be disabled.



Conditions for Clearing the DTC



* A current DTC will clear when the failed switch input is no longer active.



* A history DTC will clear after 100 ignition cycles.



Diagnostic Aids



An intermittently stuck tilt switch may cause a DTC to set.



Reference Information



Schematic Reference



Steering Wheel Schematics (See: Diagrams/Electrical Diagrams/Steering/Steering Column/Steering Wheel Schematics)



Connector End View Reference



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



Description and Operation



Steering Wheel and Column Description and Operation (See: Steering and Suspension/Steering/Steering Column/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)

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 177


* 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 B0158 02



- Outside Air Temperature Sensor Circuit Short to Ground



DTC B0158 05



- Outside Air Temperature Sensor Circuit Short to Battery or Open



DTC B0163 02



- Passenger Compartment Temp Sensor 1 Circuit Short to Ground



DTC B0163 05



- Passenger Compartment Temp Sensor 1 Circuit Short to Battery or Open



DTC B0168 02



- Passenger Compartment Temp Sensor 2 Circuit Short to Ground



DTC B0168 05



- Passenger Compartment Temp Sensor 2 Circuit Short to Battery or Open



DTC B0173 02



- Output Air Temperature Sensor 1 Circuit Short to Ground



DTC B0173 05



- Output Air Temperature Sensor 1 Circuit Short to Battery or Open



DTC B0178 02



- Output Air Temperature Sensor 2 Circuit Short to Ground



DTC B0178 05



- Output Air Temperature Sensor 2 Circuit Short to Battery or Open



DTC B0509 02



- Output Air Temperature Sensor 3 Circuit Short to Ground



DTC B0509 05



- Output Air Temperature Sensor 3 Circuit Short to Battery or Open



DTC B0514 02



- Output Air Temperature Sensor 4 Circuit Short to Ground



DTC B0514 05



- Output Air Temperature Sensor 4 Circuit Short to Battery or Open



DTC B3578 02



- Output Air Temperature Sensor 6 Circuit Short to Ground



DTC B3578 05



- Output Air Temperature Sensor 6 Circuit Short to Battery or Open



DTC B3583 02



- Output Air Temperature Sensor 7 Circuit Short to Ground



DTC B3583 05



- Output Air Temperature Sensor 7 Circuit Short to Battery or Open



Diagnostic Fault Information

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 332


DTC B1055 02



- Audio Output 4 Right Rear Circuit Short to Ground



DTC B1055 04



- Audio Output 4 Right Rear Circuit Open



DTC B1065 01



- Audio Output 5 Circuit Short to Battery (Center IP)



DTC B1065 02



- Audio Output 5 Circuit Short to Ground (Center IP)



DTC B1065 04



- Audio Output 5 Circuit Open (Center IP)



DTC B1075 01



- Audio Output 6 Circuit Short to Battery (Subwoofer)



DTC B1075 02



- Audio Output 6 Circuit Short to Ground (Subwoofer)



DTC B1075 04



- Audio Output 6 Circuit Open (Subwoofer)



DTC B1085 01



- Audio Output 7 Circuit Short to Battery (LR D-Pillar)



DTC B1085 02



- Audio Output 7 Circuit Short to Ground (LR D-Pillar)



DTC B1085 04



- Audio Output 7 Circuit Open (LR D-Pillar)



DTC B1095 01



- Audio Output 8 Circuit Short to Battery (RR D-Pillar)



DTC B1095 02



- Audio Output 8 Circuit Short to Ground (RR D-Pillar)



DTC B1095 04



- Audio Output 8 Circuit Open (RR D-Pillar)



Diagnostic Fault Information



Circuit/System Description



Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier have a DC bias voltage that is one half of the battery voltage.



When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is



produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone



to move and produce sound. This voltage will vary depending on what type of audio is being listened to, talk or music, and type of music, as well as



the volume setting of the system. Low volume and talk settings will measure around 1V AC and less, where constant music may measure 3V AC and

Friday, July 26, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 405


The voltage of the high resolution B+ circuit is greater than 16 volts for 15 seconds.



B1517 5A



The voltage of the high resolution B+ circuit is 2 volts less than the voltage of the BCM B+ circuit for 10 seconds.



Action Taken When the DTC Sets



* The instrument panel cluster (IPC) illuminates the charge indicator.



* The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM message.



Conditions for Clearing the DTC



* The DTC will pass when the battery voltage is in the normal range for 15 seconds.



* The history DTC will clear after 50 consecutive ignition cycles have occurred without a malfunction.



Diagnostic Aids



* A high or low voltage DTC in multiple modules indicates a concern in the charging system. Refer to Charging System Test (See: Starting and



Charging/Testing and Inspection/Component Tests and General Diagnostics/Charging System Test).



* Verify that the ground connections G103 and G201 are clean and tight.



Reference Information



Schematic Reference



* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)



* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System



Diagram/Power Distribution Schematics)



* Ground Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System



Diagram/Ground Distribution Schematics)



Connector End View Reference



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



Description and Operation



Charging System Description and Operation (See: Starting and Charging/Charging System/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)



Scan Tool Reference



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



Circuit/System Verification



1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and



15.0 volts.



锟斤拷 If not within the specified range, refer to Charging System Test (See: Starting and Charging/Testing and Inspection/Component Tests and



General Diagnostics/Charging System Test).



2. Observe the scan tool BCM Battery Voltage parameter and the Batt. Voltage High Res. parameter. Both readings should be between 12.60



and 15.00 volts.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connectors at the BCM.



2. Ignition OFF and scan tool disconnected, open and close the drivers door, and wait 1 minute. Test for less than 5 ohms between the following



ground circuit terminals and ground:

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 641


Circuit/System Verification



Command the Lock Rear Doors and Unlock Rear Doors with a scan tool, the rear doors should perform the LOCK and UNLOCK function.



Circuit/System Testing



1. Ignition OFF, disconnect the X3 harness connector at the I/P fuse block.



2. Connect a test lamp between the control circuit terminal A2 and ground.



3. Ignition ON, command the Lock Rear Doors with a scan tool. The test lamp should briefly illuminate during the LOCK command.



锟斤拷 If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the BCM.



锟斤拷 If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.



4. Connect a test lamp between the control circuit terminal A3 and B+.



5. Command the Unlock Rear Doors with a scan tool. The test lamp should briefly illuminate during the UNLOCK command.



锟斤拷 If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace



the BCM.



锟斤拷 If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.



6. If all circuits test normal, replace the I/P fuse block.



Repair Instructions



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



* Instrument Panel Electrical Center or Junction Block Replacement - Left Side (See: Maintenance/Fuses and Circuit Breakers/Fuse



Block/Service and Repair/Removal and Replacement/Instrument Panel Electrical Center or Junction Block Replacement - Left Side)



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



B3205



DTC B3205



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 B3205 00



- Window Inactive Over Current Fault



DTC B3205 0B



- Window Motor Fast Over Current Fault



Diagnostic Fault Information

Thursday, July 25, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 154


* Left rear side impact sensor terminal A



锟斤拷 If greater than the specified range, test the circuit for a short to voltage.



5. Test for infinite resistance between the signal circuit and ground.



* Right front end sensor terminal 1



* Left front end sensor terminal 1



* Right front side impact sensor terminal B



* Left front side impact sensor terminal B



* Right rear side impact sensor terminal B



* Left rear side impact sensor terminal B



锟斤拷 If less than the specified value, test the circuit for a short to ground.



6. Test for less than 1 ohm between the following signal circuit terminals.



* Right front end sensor terminal 1 and SDM terminal 37.



* Left front end sensor terminal 1 and SDM terminal 36.



* Right front side impact sensor terminal B and the SDM terminal 43.



* Left front side impact sensor terminal B and the SDM terminal 42.



* Right rear side impact sensor terminal B and the SDM terminal 45.



* Left rear side impact sensor terminal B and the SDM terminal 44.



锟斤拷 If greater than the specified range, test the circuit for an open/high resistance.



7. Test for less then 1 ohm between the following front end sensor low reference circuit terminals.



* Right front end sensor terminal 2 and SDM terminal 39.



* Left front end sensor terminal 2 and SDM terminal 38.



* Right front side impact sensor terminal A and the SDM terminal 41.



* Left front side impact sensor terminal A and the SDM terminal 40.



* Right rear side impact sensor terminal A and the SDM terminal 47.



* Left rear side impact sensor terminal A and the SDM terminal 46.



锟斤拷 If greater than the specified range, test the circuit for an open/high resistance.



8. If all circuits test normal, replace the appropriate sensor.



9. Reconnect all SIR components. Ignition ON, with a scan tool clear and check for DTCs.



锟斤拷 If the DTC returns and is current, replace the SDM.



Repair Instructions



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



* Inflatable Restraint Front End Sensor Replacement (See: Restraints and Safety Systems/Air Bag Systems/Impact Sensor/Service and



Repair/Inflatable Restraint Front End Sensor Replacement)



* Inflatable Restraint Side Impact Sensor Replacement (Front Side Door) (See: Restraints and Safety Systems/Air Bag Systems/Impact



Sensor/Service and Repair/Inflatable Restraint Side Impact Sensor Replacement (Front Side Door))Inflatable Restraint Side Impact Sensor



Replacement (Rear Side Door) (See: Restraints and Safety Systems/Air Bag Systems/Impact Sensor/Service and Repair/Inflatable Restraint



Side Impact Sensor Replacement (Rear Side Door))



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



Procedures/Wiring Repairs/SIR/SRS Wiring Repairs)



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



B0091



DTC B0091



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.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 663


DTC B3604 or B3605



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 B3604 01



- Adjustable Foot Pedal Forward Switch Circuit Short to Battery



DTC B3605 01



- Adjustable Foot Pedal Rearward Switch Circuit Short to Battery



Diagnostic Fault Information



Circuit/System Description



The adjustable pedals forward and rearward switches are inputs to the memory seat module (MSM). The MSM supplies the switch assembly with a



battery positive reference voltage. When the switch is operated to the forward or rearward direction, battery positive voltage is applied to the forward



or rearward switch signal inputs.



Conditions for Running the DTC



System voltage is 9-16 volts.



Conditions for Setting the DTC



The forward and rearward switch signal circuits are active at the same time.



Action Taken When the DTC Sets



The adjustable pedals will be disabled.



Conditions for Clearing the DTC



* The DTC becomes history when the conditions for setting the DTC are no longer present.



* The history DTC clears after 100 malfunction-free ignition cycles.



Reference Information



Schematic Reference



Adjustable Pedal Schematics (See: Accessories and Optional Equipment/Pedal Positioning System/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Adjustable Pedals Description and Operation (with Memory) (See: Accessories and Optional Equipment/Pedal Positioning System/Description and



Operation/Adjustable Pedals Description and Operation (with Memory))Adjustable Pedals Description and Operation (w/o Memory) (See:



Accessories and Optional Equipment/Pedal Positioning System/Description and Operation/Adjustable Pedals Description and Operation (w/o



Memory))



Electrical Information Reference

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 164


Diagnostic Fault Information



Circuit/System Description



Modules connected to the high and low speed GMLAN serial data circuits monitor for serial data communications during normal vehicle operation.



Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are



needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used



by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter



module.



The wake up signal circuit is energized by the serial data gateway (SDG) module to activate the drive motor generator power inverter module (PIM)



and the drive motor generator battery control module. If the wake up signal is not responded to by all three modules, this DTC sets in the SDG



module.



Conditions for Running the DTC



* The system voltage is between 9-16 volts.



* The vehicle power mode master requires serial data communication to occur.



Conditions for Setting the DTC



A short circuit exists on the wake up signal circuit of the SDG module.



Action Taken When the DTC Sets



The malfunction indicator lamp (MIL) illuminates and the driver information center (DIC) displays the message Service Hybrid System.



Conditions for Clearing the DTC



* A current DTC clears when the malfunction is no longer present.



* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.



Reference Information



Schematic Reference



* Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical



Diagrams)



* Hybrid Controls Schematics ()



Connector End View Reference



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



Description and Operation



Data Link Communications Description and Operation (See: Powertrain Management/Computers and Control Systems/Information



Bus/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)



Scan Tool Reference



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



Special Tools



* EL-48569 Terminal Covers



* EL-48900 HEV Safety Kit

Wednesday, July 24, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 545


Conditions for Setting the DTC



* The navigation radio tests the navigation display backlighting every 1 second.



* The radio determines there is a malfunction or overheat condition in the navigation display backlighting.



Action Taken When the DTC Sets



Navigation backlighting may be too bright, dim or blank.



Conditions for Clearing the DTC



* The condition responsible for setting the DTC no longer exists.



* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.



Diagnostic Aids



Occasionally it is possible to overheat the navigation display backlighting due to excessive ambient heat inside the vehicle. In this instance it may be



necessary to allow time for the display to cool.



Reference Information



Schematic Reference



Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System



Schematics)



Connector End View Reference



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



Description and Operation



Navigation System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Navigation System



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)



Scan Tool Reference



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



Circuit/System Verification



1. Ignition OFF, allow the navigation display to cool if the ambient temperature inside the vehicle is excessive and the radio is hot to the touch.



Verify the navigation display is cool and the DTC has cleared and gone to history.



2. Ignition ON, with a scan tool, clear all DTCs and operate the audio/navigation system within the Conditions for Running the DTC. Verify the



DTC does not reset.



锟斤拷 If the DTC resets, replace the radio.



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 Radio replacement, setup, and programming



B2476



DTC B2476 or B2482



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.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 607


* 2WD HI



* AWD/4WD Auto



* 4WD HI



* 4WD LO



* Neutral



Conditions for Running the DTC



* Ignition ON.



* System voltage 10.5-18 V.



Conditions for Setting the DTC



* The system constantly monitors the voltage on switch signal circuit.



* If the system detects a voltage level under 0.38 volts or greater than 4.86 volts for 60 seconds, the DTC is logged.



Action Taken When the DTC Sets



* All shifting is disabled.



* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.



Conditions for Clearing the DTC



* The TCCM clears the DTC once the condition for setting the DTC is no longer present.



* A history DTC clears after 40 consecutive warm up cycles without a fault present.



* History DTCs can be cleared using a scan tool.



Diagnostic Aids



EL-49742 - harness is a good source for B+ and ground.



Reference Information



Schematic Reference



Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3023/3024-NQH - Transfer



Case)



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)



Scan Tool Reference



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



Special Tools



* EL-49742 - Battery Voltage B+ and Ground Source Harness



* J 35616 - GM-Approved Terminal Test Kit



Circuit/System Verification



1. Key ON, engine OFF.



2. Connect a scan tool.



3. Verify that all mode selections of the transfer case shift control switch (TCSCS) match the following parameters in the Data Display feature of



the scan tool:



* Mode Switch Selected



* Transfer Case Position



* The corresponding Mode Indicator Light

Tuesday, July 23, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 45


Diagnostic Aids



* When a harness connector is disconnected, the high control and low control circuits are shorted together by the integral shorting bar. This



should be taken into account when testing for faults on these circuits.



* This DTC usually indicates a poor connection or a wiring malfunction between the SDM and the deployment loop.



Reference Information



Schematic Reference



SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)



Connector End View Reference



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



Description and Operation



SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/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)



Scan Tool Reference



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



Special Tools Required



J 38715-A Driver and Passenger SIR Load Tool



Circuit/System Verification



Note: Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety Information)



Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of



the affected component/connector.



* Seat belt pretensioner



* Passenger instrument panel airbag



* Side air bag



* Roof rail airbag



* SDM



* SDM wiring harness connector



Note: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an



audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.



If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the



high resistance condition due to terminal fretting corrosion.



Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay



consistently between 1.7 and 4.2 ohm without any drop outs or spikes.



* Passenger instrument panel air bag



* Roof rail air bag



* Seat side air bag



* Seat belt pretensioner



* Any inline harness



* SDM



If the reading is erratic while moving the harness, perform the following;



* Inspect each connector terminal for damage or corrosion and repair as necessary.



* Apply Nyogel lubricant 760G to each connector terminal.



* Insure each connector and CPA is correctly seated.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 478


The module detects that the set point temperature has not been reached within 8.5 minutes.



B1935 0B, B1935 0E, B2180 0B, or B2180 0E



By measuring output current, the module calculates that the heating element resistance is below the minimum resistance.



B1935 0C, B1935 0D, B2180 0C, or B2180 0D



By measuring output current, the module calculates that the heating element resistance is above the maximum resistance.



B1935 1F or B2180 1F



The temperature sensor voltage is erratic or changes suddenly.



Action Taken When the DTC Sets



The heated seat back function for the affected seat will be disabled.



Conditions for Clearing the DTC



* The current DTC clears when the malfunction is no longer present and the power mode changes to OFF then back to ACC or RUN.



* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.



Reference Information



Schematic Reference



Heated/Cooled Seat Schematics ()



Connector End View Reference



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



Description and Operation



Heated Seats Description and Operation (KA1) ()Heated Seats Description and Operation (KA6) ()



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)



Scan Tool Reference



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



Circuit/System Testing



B1935 0A, B1935 0B, B1935 0C, B1935 0D, B1935 0E, B1935 04, or B1935 1F



1. Ignition OFF, disconnect the X1 harness connector at the HSM.



Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat



unoccupied, then with the seat occupied.



2. Test for 3.5 - 11.5 Ohms between control circuit terminal 3 and control circuit terminal 1.



锟斤拷 If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heater element.



锟斤拷 If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat back



heater element.



3. Disconnect the X2, X4 harness connectors at the HSM.



4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 19 X4 and the low reference circuit terminal 5 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



back heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat back heater element/temperature sensor.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 213


B320A 39



If the DTC is current, the appropriate window motor must be replaced before the DTC can be cleared.



B320A 42



The affected power window motor must be programmed before the DTC can be cleared.



B320A 4B



The affected power window motor must be calibrated before the DTC can be cleared.



Reference Information



Schematic Reference



Moveable Window Schematics (See: Windows and Glass/Windows/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Power Windows Description and Operation (See: Windows and Glass/Windows/Description and Operation/Power Windows 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)



Scan Tool Reference



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



Circuit/System Verification



B320A 39



Ignition ON, command the appropriate power window DOWN and UP with a scan tool. The power window should go DOWN and UP as



commanded.



If the DTC is current and the power window is inoperative, replace the power window motor.



If the DTC is history and the power window performs the UP and DOWN functions, clear the DTC.



B320A 42



Ignition ON, reprogram the appropriate power window and operate the power window within the conditions for running the DTC, verify the DTC



does not reset.



If the DTC resets, replace the power window motor.



B320A 4B



Command the front window motor fully DOWN by pressing and holding the front window switch for 5 seconds, then command the front window



motor fully UP by lifting and holding the front window switch for 5 seconds.



If the DTC resets, replace the power window motor.



Repair Instructions



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



Front Side Door Window Regulator Motor Replacement (See: Windows and Glass/Windows/Service and Repair/Front Side Door Window



Regulator Motor Replacement)

Monday, July 22, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 518


The module detects that the set point temperature has not been reached within 8.5 minutes.



B2425 0B, B2425 0E, B2430 0B, or B2430 0E



By measuring output current, the module calculates that the heating element resistance is below the minimum resistance.



B2425 0C, B2425 0D, B2430 0C, or B2430 0D



By measuring output current, the module calculates that the heating element resistance is above the maximum resistance.



B2425 1F or B2430 1F



The temperature sensor voltage is erratic or changes suddenly.



Action Taken When the DTC Sets



The heated seat cushion function for the affected seat will be disabled.



Conditions for Clearing the DTC



* The current DTC clears when the malfunction is no longer present, and the power mode changes to OFF then back to ACC or RUN.



* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.



Reference Information



Schematic Reference



Heated/Cooled Seat Schematics ()



Connector End View Reference



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



Description and Operation



Heated Seats Description and Operation (KA1) ()Heated Seats Description and Operation (KA6) ()



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)



Scan Tool Reference



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



Circuit/System Verification



Verify the type of vehicle and the heated seat system for which the DTC set.



If the DTC set in a vehicle equipped with memory, refer to Circuit/System Testing below.



If the DTC set in a hybrid vehicle without memory, refer to DTC B2425 or B2430 (HP2 w/o memory).



If the DTC set in a non-hybrid vehicle without memory, refer to DTC B2425 or B2430 (Dealer installed).



If the DTC set in the rear heated seat module, refer to DTC B2425 or B2430 (Rear seat).



Circuit/System Testing



B2425 0A, B2425 0B, B2425 0C, B2425 0D, B2425 0E, B2425 04, or B2425 1F



1. Ignition OFF, disconnect the X3 harness connector at the MSM.



2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.



3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the X1 harness connector at the MSM.



Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat



unoccupied, then with the seat occupied.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 369


Circuit/System Description



The memory seat module (MSM) monitors the current supplied to the seat adjuster motors. The MSM can detect both absolute and differential



current levels from the motors. Absolute current is the maximum allowable current the module will supply to the motors. A differential current



mismatch occurs when the current supplied to the seat, lumbar and adjustable pedal motors do not match the current returning from the motors.



Conditions for Running the DTC



The MSM establishes that it is not closing to a shorted motor control circuit before the motors are active.



Conditions for Setting the DTC



B1335 00



Current out of the module does not match the current returning to the module within 5 amps.



B1335 0B



The absolute current or an over-current has exceeded the maximum value allowed.



B1335 42



This DTC will set if the module calibration is not programmed.



B1335 4B



This DTC will set if the module calibration is out of range.



Action Taken When the DTC Sets



The adjustable pedal motor and all driver seat adjuster motors are disabled.



Conditions for Clearing the DTC

Sunday, July 21, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 691


B3823 00



The BCM detects a fault in the right rear window down circuit.



Action Taken When the DTC Sets



The left or right rear power window will be inoperative from the driver master control.



Conditions for Clearing the DTC



* The DTC will be current for as long as the fault is present.



* When the fault is no longer present, the DTC will be a history DTC.



* A history DTC will clear after 50 ignition cycles.



Reference Information



Schematic Reference



Moveable Window Schematics (See: Windows and Glass/Windows/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Power Windows Description and Operation (See: Windows and Glass/Windows/Description and Operation/Power Windows 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)



Scan Tool Reference



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



Circuit/System Verification



Ignition ON, command the appropriate rear door window UP and DOWN by using the window switch on the driver master control. The rear door



window should perform UP and DOWN function.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.



2. Ignition ON, test for greater than 9 volts between the signal circuit terminal A and ground while commanding the rear window UP by using the



window switch on the driver master control.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the



BCM.



3. Test for greater than 9 volts between the signal circuit terminal C and ground while commanding the rear window DOWN by using the



window switch on the driver master control.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the



BCM.



4. If all circuits test normal, replace the rear window switch.



Repair Instructions



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



* Rear Side Door Window Switch Replacement (See: Windows and Glass/Windows/Service and Repair/Rear Side Door Window Switch



Replacement)



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

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 303


HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams/HVAC - Manual)



Connector End View Reference



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



Description and Operation



* Air Temperature Description and Operation (See: Heating and Air Conditioning/Description and Operation/HVAC - Manual/Air



Temperature Description and Operation)Air Temperature Description and Operation



* Air Delivery Description and Operation (See: Heating and Air Conditioning/Description and Operation/HVAC - Manual/Air Delivery



Description and Operation)Air Delivery 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)



Scan Tool Reference



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



Circuit/System Verification



1. Ignition ON, disconnect the harness connector at the auxiliary HVAC control module, test for 4.8-5.2 volts between the 5-volt reference



circuit terminal 3 and ground.



锟斤拷 If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the HVAC Control Module.



锟斤拷 If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the HVAC



Control Module.



2. Reprogram the HVAC control module that set DTC B1023. The module should successfully reprogram.



锟斤拷 If the module will not reprogram, replace the HVAC control module that set the DTC.



3. With a scan tool, clear the DTC.



4. Ignition OFF.



5. Wait 60 seconds, then recheck for DTCs. DTC B1023 should not set.



锟斤拷 If DTC B1023 sets, replace the module.



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)Control Module References for control module



replacement, setup, and programming



B1024



DTC B1024



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.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 290


DTC B1000 12



- Electronic Control Unit (ECU) Performance Below Minimum Threshold



DTC B1000 31



- Electronic Control Unit (ECU) General Checksum Problem



DTC B1000 32



- Electronic Control Unit (ECU) General Memory Failure



DTC B1000 33



- Electronic Control Unit (ECU) Performance Special Memory Failure



DTC B1000 34



- Electronic Control Unit (ECU) Performance RAM Integrity



DTC B1000 35



- Electronic Control Unit (ECU) Performance ROM Integrity



DTC B1000 36



- Electronic Control Unit (ECU) Performance EEPROM Integrity



DTC B1000 37



- Electronic Control Unit (ECU) Performance Watchdog / Safety Failure



DTC B1000 38



- Electronic Control Unit (ECU) Performance Supervision Software Failure



DTC B1000 39



- Electronic Control Unit (ECU) Performance Internal Electronic Failure



DTC B1000 43



- Electronic Control Unit (ECU) Performance EEPROM Error



DTC B1000 46



- Side Object Detection Performance - Invalid Configuration



DTC B1000 56



- Electronic Control Unit (ECU) Performance Allowable Number of Transitions / Events Exceeded



DTC B1000 57



- Electronic Control Unit (ECU) Performance



DTC B1000 73



- Electronic Control Unit (ECU) Performance Parity Error



DTC B1000 0F



- Electronic Control Unit (ECU) Performance Erratic



DTC B1000 2B



- Electronic Control Unit (ECU) Performance Missing Reference



DTC B1000 2C



- Electronic Control Unit Performance Reserved



DTC B1000 3B



- Electronic Control Unit (ECU) Performance Internal Self Test Failed



DTC B1000 3C



- Electronic Control Unit (ECU) Performance Internal Communications Failure



DTC B1000 4A



- Side Object Detection Performance - PROM Checksum Error



DTC B1000 F0



- Side Object Detection RF Transmit Chain Failed



DTC B1000 F1



- Side Object Detection RF Receive Chain Failed

Saturday, July 20, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 431


* Front vertical upward switch terminal A



* Front vertical downward switch terminal K



* Rear vertical upward switch terminal F



* Rear vertical downward switch terminal J



* Horizontal forward switch terminal D



* Horizontal rearward switch terminal C



* Recline forward switch terminal H



* Recline rearward switch terminal G



3. If all circuits test normal, test or replace the seat adjuster switch.



Component Testing



1. Ignition OFF, disconnect the harness connector at the seat adjuster switch.



2. Test for infinite resistance between each seat direction signal terminal listed below and the B+ terminal E with the switch in the open position.



* Front vertical upward switch terminal A



* Front vertical downward switch terminal K



* Rear vertical upward switch terminal F



* Rear vertical downward switch terminal J



* Horizontal forward switch terminal D



* Horizontal rearward switch terminal C



* Recline forward switch terminal H



* Recline rearward switch terminal G



锟斤拷 If not the specified value, replace the seat adjuster switch.



3. Test for less than 1 ohm between each seat direction signal terminal listed below and the B+ terminal E with the switch in the closed position.



* Front vertical upward switch terminal A



* Front vertical downward switch terminal K



* Rear vertical upward switch terminal F



* Rear vertical downward switch terminal J



* Horizontal forward switch terminal D



* Horizontal rearward switch terminal C



* Recline forward switch terminal H



* Recline rearward switch terminal G



锟斤拷 If greater than the specified range, replace the adjuster switch switch.



Repair Instructions



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



* Power Seat Switch Replacement (with HP2) ()Power Seat Switch Replacement (without HP2) ()



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



B1750



DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820



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 B1735 01



- Seat Front Up Switch Circuit Short to Battery



DTC B1740 01



- Seat Front Down Switch Circuit Short to Battery

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 51


B0014 02, B0015 02, B0016 02, B0019 02, B0020 02, B0021 02, B0022 02, B0023 02



The air bag or seat belt retractor pretensioner high and/or low control circuit is shorted to ground for 120 milliseconds.



B0014 04, B0015 04, B0016 04, B0019 04, B0020 04, B0021 04, B0022 04, B0023 04



The air bag or seat belt retractor pretensioner high and/or low control circuit is open for 120 milliseconds.



B0014 0D, B0015 0D, B0016 0D, B0019 0D, B0020 0D, B0021 0D, B0022 0D, B0023 0D



The air bag or seat belt retractor pretensioner deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.



B0014 0E, B0015 0E, B0016 0E, B0019 0E, B0020 0E, B0021 0E, B0022 0E, B0023 0E



The air bag or seat belt retractor pretensioner deployment loop resistance is less than 1.1 ohm for 120 milliseconds.



Action Taken When the DTC Sets



* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.



* The SDM will store a DTC, however if an event occurs the system will still attempt deployments.



Conditions for Clearing the DTC



* The condition for setting the DTC no longer exists.



* A history DTC will clear once 100 fault-free ignition cycles have occurred.



Diagnostic Aids



* When a harness connector is disconnected, the high control and low control circuits are shorted together by the integral shorting bar. This



should be taken into account when testing for faults on these circuits.



* This DTC usually indicates a poor connection or a wiring malfunction between the SDM and the deployment loop.



Reference Information



Schematic Reference



SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)



Connector End View Reference



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



Description and Operation



SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/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)



Scan Tool Reference



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



Special Tools Required



J 38715-A Driver and Passenger SIR Load Tool



Circuit/System Verification



Note: Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety Information)



Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of



the affected component/connector.



* Seat belt pretensioner



* Passenger instrument panel airbag

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 699


Circuit/System Description



The windshield washer function is controlled by the body control module (BCM). When the washer switch is pressed, ground is applied through the



switch contacts and the signal circuit to the BCM indicating the wash request. The BCM then applies ground through the control circuit to the coil



side of the WSH Relay energizing the relay. With the relay energized, battery voltage from the WPR fuse is applied through the switch contacts of



the relay, the WSW/PUMP Fuse, and the control circuit to the windshield washer fluid pump.



Conditions for Running the DTC



This DTC can set only when the output is actively being requested by the BCM.



Conditions for Setting the DTC



This DTC sets if the BCM detects a short to voltage in the windshield washer pump relay control circuit.



Action Taken When the DTC Sets



The BCM will not activate the output.



Conditions for Clearing the DTC



* The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.



* The history DTC will clear after 50 consecutive ignition cycles without a fault present.



Reference Information



Schematic Reference



Wiper/Washer Schematics (See: Wiper and Washer Systems/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Wiper/Washer System Description and Operation (See: Wiper and Washer Systems/Description and Operation/Wiper/Washer System 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)



Scan Tool Reference



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



Circuit/System Verification



Operate the washers using the WASH switch. Verify the washer pump activates.



Circuit/System Testing



1. Ignition OFF, disconnect the X4 harness connector at the BCM.



2. Ignition ON, verify the windshield washer pump is not on.



锟斤拷 If the windshield washer pump is on, test the windshield washer pump relay control circuit terminal 15 for a short to ground. If the circuit



tests normal replace the underhood fuse block.



3. Install a 10A fused jumper wire between the relay control circuit terminal 15 and ground. Verify the windshield washer pump is on.



锟斤拷 If the windshield washer pump is not on, test the relay control circuit for a short to voltage or an open/high resistance. If the circuit tests



normal replace the underhood fuse block.



4. If all circuits test normal, replace the BCM.