Sunday, March 31, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 638


Circuit/System Description



The LOCK/UNLOCK relay is controlled by the body control module (BCM) by providing voltage to one side of the relay or providing a ground to



the other side of the relay. During lock or unlock operation, battery voltage will be supplied to the lock actuators through the energized side of the



relay and grounded through the de-energized side of the relay.



Conditions for Running the DTC



The system voltage must be between 9-16 volts.



Conditions for Setting the DTC



B3130 00



The BCM detects a fault on the REAR DOOR LOCK/UNLOCK relay control circuit while commanding the rear doors to unlock.



B3135 00



The BCM detects a fault on the REAR DOOR LOCK/UNLOCK relay control circuit while commanding the rear doors to lock.



Action Taken When the DTC Sets



The rear power door locks will malfunction.



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 become a history DTC.



* A history DTC will clear after 50 ignition cycles.



Reference Information



Schematic Reference



Door Lock/Indicator Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Door Lock/Indicator Schematics)



Connector End View Reference



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



Description and Operation



Power Door Locks Description and Operation (See: Body and Frame/Locks/Power Locks/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

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 184


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. Measure actual outside air temperature using a thermometer. Compare this value to the scan tool Outside Air Temp. Raw parameter. The



measured temperature should be within 5 degrees of parameter.



锟斤拷 If not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.



2. Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Inside Air Temp. Sensor parameter and Aux.



Inside Air Temp. parameter. The measured temperature should be within 5 degrees of parameter.



锟斤拷 If not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.



3. Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool Duct



Actual parameter. The measured temperature should be within 5 degrees of appropriate Duct Actual parameter.



锟斤拷 If not within the specified range, refer to Duct Temperature Sensor Circuit Malfunction.



Circuit/System Testing



Ambient / Inside Air Temperature Sensor Circuit Malfunction



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



2. Test for less than 1 ohm between the low reference circuit terminal B and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the HVAC



control module.



3. Ignition ON, verify the appropriate scan tool Temp Sensor parameter is greater than 85锟斤拷C (185锟斤拷F).



锟斤拷 If less than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the HVAC control



module.



4. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Temp



Sensor parameter is less than -35锟斤拷C (-39锟斤拷F).



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



the HVAC control module.



5. If all circuits test normal, test or replace the appropriate temperature sensor.



Duct Temperature Sensor Circuit Malfunction



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



2. Test for less than 1.0 ohm between the low reference circuit terminal 2 and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the HVAC



control module.



3. Ignition ON, verify the appropriate Duct Temp Sensor Actual parameter is greater than 85锟斤拷C (185锟斤拷F).



锟斤拷 If less than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the HVAC control



module.



4. Install a 3-amp fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Duct



Temp Sensor Actual parameter is less than -35锟斤拷C (-39锟斤拷F).



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



the HVAC control module.



5. If all circuits test normal, test or replace the appropriate temperature sensor.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 156


B0091 3A



* The SDM has received an ID message from the front end sensor, which does not match the ID stored in the SDM memory.



* The SDM has reset the front end sensor twice without detecting the correct ID message.



B0091 71



The SDM has received invalid serial data from the front end sensor.



Action Taken When the DTC Sets



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



* The frontal SIR System is disabled and no frontal deployments are allowed. Side deployments and rollover detection is still enabled.



Conditions for Clearing the DTC



* The condition for setting the DTC no longer exists.



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



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



Circuit/System Testing



Important: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or



replacement of the affected component/connector:



* Front end sensor



* SDM module



* Front end sensor wiring harness connector



* SDM wiring harness connector



1. Ignition OFF, disconnect the front end sensor harness connector. Refer to front end sensor replacement for location of connector.



2. Remove the SDM harness connector. Refer to SDM replacement for location of connector.



3. Test for infinite resistance between the front end sensor signal circuit terminal 1 and ground.



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



4. Ignition ON, test for less than 1 volt between the front end sensor signal circuit terminal 1 and ground.



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



5. Ignition ON, test for less than 1 volt between the front end sensor low reference circuit terminal 2 and ground.



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

Saturday, March 30, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 335


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.



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



7. Disconnect the X3 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 13



* Left rear low level audio signal (-) - terminal 5



* Right rear low level audio signal (+) - terminal 12



* Right rear low level audio signal (-) - terminal 4



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 Radio UQA with Y91 and U42 or UQS and U42



1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.



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



* Left front low level audio signal (+) - terminal 11 X3



* Left front low level audio signal (-) - terminal 12 X3



* Right front low level audio signal (+) - terminal 3 X3



* Right front low level audio signal (-) - terminal 4 X3



* Left rear low level audio signal (+) - terminal 11 X4



* Left rear low level audio signal (-) - terminal 12 X4



* Right rear low level audio signal (+) - terminal 3 X4



* Right rear low level audio signal (-) - terminal 4 X4



* Subwoofer low level audio signal (+) - terminal 5 X4



* Subwoofer low level audio signal (-) - terminal 6 X4



* Center Channel low level audio signal (+) - terminal 13 X4



* Center Channel low level audio signal (-) - terminal 14 X4



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.



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.



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



DTC Set By Radio UQA with Y91 and U42 or UQS and U42



1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.



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



* Left front low level audio signal (+) - terminal 11 X3



* Left front low level audio signal (-) - terminal 12 X3



* Right front low level audio signal (+) - terminal 3 X3



* Right front low level audio signal (-) - terminal 4 X3



* Subwoofer low level audio signal (+) - terminal 5 X4



* Subwoofer low level audio signal (-) - terminal 6 X4



* Center Channel low level audio signal (+) - terminal 13 X4



* Center Channel low level audio signal (-) - terminal 14 X4



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.



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.



3. Ignition OFF, reconnect the X3 harness connector at the amplifier.



4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.



5. 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 1



* Left rear low level audio signal (-) - terminal 2



* Right rear low level audio signal (+) - terminal 3



* Right rear low level audio signal (-) - terminal 4

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 287


* The DTC will transition to history when the fault is no longer present.



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



Diagnostic Aids



If the parking aid switch is continuously pressed for greater than 5 seconds the DTC will set.



Reference Information



Schematic Reference



Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical



Diagrams)



Connector End View Reference



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



Description and Operation



Object Detection Description and Operation (UFT) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist



Systems/Description and Operation/Object Detection Description and Operation (UFT))Object Detection Description and Operation (UVC) (See:



Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and



Operation (UVC))Object Detection Description and Operation (UD7) (See: Accessories and Optional Equipment/Collision Avoidance and Parking



Assist Systems/Description and Operation/Object Detection Description and Operation (UD7))



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, observe the scan tool Park Assist Switch parameter while cycling the parking assist disable switch. The parameter should change



between Active and Inactive.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.



2. Test for less than 1.0 Ohms between the appropriate ground circuit listed below and ground:



* RPO X88/Z88 ground circuit terminal 3



* RPO Z75 ground circuit terminal 5



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



3. Ignition ON, verify that the scan tool Park Assist Switch parameter is Inactive.



锟斤拷 If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the object alarm module.



4. Ignition OFF, connect a 3A fused jumper wire between signal circuit terminal 2 and ground.



5. Ignition ON, verify that the scan tool Park Assist Switch parameter is Active.



锟斤拷 If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the



object alarm module.



6. If all circuits test normal, test or replace the I/P multifunction switch.



Repair Instructions



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



* Accessory Switch Replacement (Except Cadillac) (See: Instrument Panel, Gauges and Warning Indicators/Service and Repair/Accessory

Friday, March 29, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 75


- Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold



DTC B0015 0E



- Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold



DTC B0016 01



- Left Roof Rail Air Bag Deployment Loop Short to Battery



DTC B0016 02



- Left Roof Rail Air Bag Deployment Loop Short to Ground



DTC B0016 04



- Left Roof Rail Air Bag Deployment Loop Open Circuit



DTC B0016 0D



- Left Roof Rail Air Bag Deployment Loop Resistance Above Threshold



DTC B0016 0E



- Left Roof Rail Air Bag Deployment Loop Resistance Below Threshold



DTC B0019 01



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Battery



DTC B0019 02



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Ground



DTC B0019 04



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Open Circuit



DTC B0019 0D



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Above Threshold



DTC B0019 0E



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Below Threshold



DTC B0020 01



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Battery



DTC B0020 02



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Ground



DTC B0020 04



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Open Circuit



DTC B0020 0D



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Above Threshold



DTC B0020 0E



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Below Threshold



DTC B0021 01



- Passenger Side Seat Air Bag Deployment Loop Short to Battery



DTC B0021 02



- Passenger Side Seat Air Bag Deployment Loop Short to Ground



DTC B0021 04



- Passenger Side Seat Air Bag Deployment Loop Open Circuit



DTC B0021 0D



- Passenger Side Seat Air Bag Deployment Loop Resistance Above Threshold



DTC B0021 0E



- Passenger Side Seat Air Bag Deployment Loop Resistance Below Threshold



DTC B0022 01



- RF Pretensioner Deployment Loop Short to Battery



DTC B0022 02



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 281


Conditions for Running the DTC



* DTC B1325 is not set



* Ignition voltage is between 9-16 V



* Transmission in REVERSE



Conditions for Setting the DTC



B0958 01, B0959 01, B0960 01, or B0961 01



Voltage seen on the object alarm sensor signal circuit is greater than 11.5 V or the object alarm sensor is not grounded.



B0958 06, B0959 06, B0960 06, or B0961 06



Voltage seen on the object alarm sensor signal circuit is less than 0.5 V.



B0958 08, B0959 08, B0960 08, or B0961 08



An invalid signal is received by the object alarm module.



B0958 21, B0959 21, B0960 21, or B0961 21



The object alarm sensor determines no change in the position of an object while the vehicle is in motion.



B0958 3A, B0959 3A, B0960 3A, B0961 3A



The object alarm module determines there is an incorrect sensor installed.



Action Taken When the DTC Sets



* The parking assist system is disabled.



* The object alarm module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the



driver information center (DIC).



Conditions for Clearing the DTC



* The DTC will transition to history when the fault is no longer present.



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



Diagnostic Aids



Make sure the object alarm sensors located on the vehicle rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.



Reference Information



Schematic Reference



Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical



Diagrams)



Connector End View Reference



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



Description and Operation



Object Detection Description and Operation (UFT) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist



Systems/Description and Operation/Object Detection Description and Operation (UFT))Object Detection Description and Operation (UVC) (See:



Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and



Operation (UVC))Object Detection Description and Operation (UD7) (See: Accessories and Optional Equipment/Collision Avoidance and Parking



Assist Systems/Description and Operation/Object Detection Description and Operation (UD7))



Electrical Information Reference



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



Testing/Circuit Testing)



* 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)



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



Procedures/Connector Repairs/Connector Repairs)

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 158


* This DTC may be stored as a history DTC without affecting the operation of the control module.



* Do not replace a control module based only on DTC B101D being set in history with the exception of the following control modules:



- Sensing and Diagnostic Module (SDM)



- Passenger Presence System Module



* If DTC B101D is set as current, replace the appropriate control module.



Circuit/System Verification



Verify that DTC B101D is not set.



If the DTC is set, replace the control module that set the DTC.



Repair Instructions



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



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



B101E



DTC B101E



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 B101E XX



- ECU Software



Circuit/System Description



Some control modules must be configured with specific software, serial numbers, vehicle options, or other information. If a control module was not



properly configured after installation that module may set DTC B101E. The symptom byte listed in the DTC Descriptor is for engineering reference



only. No external circuit diagnosis is involved.



Conditions for Running the DTC



Battery voltage is between 9-16 V and data link communications operate normally.



Conditions for Setting the DTC



The control module is not configured properly.



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, 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)



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

Thursday, March 28, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 62


- Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold



DTC B0015 0E



- Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold



DTC B0016 01



- Left Roof Rail Air Bag Deployment Loop Short to Battery



DTC B0016 02



- Left Roof Rail Air Bag Deployment Loop Short to Ground



DTC B0016 04



- Left Roof Rail Air Bag Deployment Loop Open Circuit



DTC B0016 0D



- Left Roof Rail Air Bag Deployment Loop Resistance Above Threshold



DTC B0016 0E



- Left Roof Rail Air Bag Deployment Loop Resistance Below Threshold



DTC B0019 01



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Battery



DTC B0019 02



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Ground



DTC B0019 04



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Open Circuit



DTC B0019 0D



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Above Threshold



DTC B0019 0E



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Below Threshold



DTC B0020 01



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Battery



DTC B0020 02



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Ground



DTC B0020 04



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Open Circuit



DTC B0020 0D



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Above Threshold



DTC B0020 0E



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Below Threshold



DTC B0021 01



- Passenger Side Seat Air Bag Deployment Loop Short to Battery



DTC B0021 02



- Passenger Side Seat Air Bag Deployment Loop Short to Ground



DTC B0021 04



- Passenger Side Seat Air Bag Deployment Loop Open Circuit



DTC B0021 0D



- Passenger Side Seat Air Bag Deployment Loop Resistance Above Threshold



DTC B0021 0E



- Passenger Side Seat Air Bag Deployment Loop Resistance Below Threshold



DTC B0022 01



- RF Pretensioner Deployment Loop Short to Battery



DTC B0022 02



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 640


Circuit/System Description



The LOCK/UNLOCK relay is controlled by the body control module (BCM) by providing voltage to one side of the relay or providing a ground to



the other side of the relay. During lock or unlock operation, battery voltage will be supplied to the lock actuators through the energized side of the



relay and grounded through the de-energized side of the relay.



Conditions for Running the DTC



The system voltage must be between 9-16 volts.



Conditions for Setting the DTC



B3130 00



The BCM detects a fault on the REAR DOOR LOCK/UNLOCK relay control circuit while commanding the rear doors to unlock.



B3135 00



The BCM detects a fault on the REAR DOOR LOCK/UNLOCK relay control circuit while commanding the rear doors to lock.



Action Taken When the DTC Sets



The rear power door locks will malfunction.



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 become a history DTC.



* A history DTC will clear after 50 ignition cycles.



Reference Information



Schematic Reference



Door Lock/Indicator Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Door Lock/Indicator Schematics)



Connector End View Reference



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



Description and Operation



Power Door Locks Description and Operation (See: Body and Frame/Locks/Power Locks/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

Wednesday, March 27, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 623


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



* Tilt Motor Replacement (See: Steering and Suspension/Steering/Steering Column/Tilt Wheel Motor/Service and Repair)



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



B2890



DTC B2890



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 B2890 4B



- Tilt and Telescope Motor Circuit Calibration Not Learned



Circuit Description



The memory seat module (MSM) learns tilt soft stops approximately 1.3 cm (0.5 in) from the mechanical ends of travel. The system uses soft stops



to prevent wear on the system by ensuring that the steering column movement stops before it reaches its mechanical end of travel in any direction.



The soft stops are initially programmed at the factory. The stop positions may be reprogrammed, which is necessary any time the MSM is replaced.



Conditions for Running the DTC



Ignition ON.



Conditions for Setting the DTC



The soft stops have not been learned.



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 soft stops have been learned.



* A history DTC will clear after 100 ignition cycles.



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 358


Circuit/System Description



The digital radio receiver (DRR) receives an XM satellite radio signal via the digital radio antenna. This signal is passed to the DRR through the



digital radio antenna coax. The DRR sends a varying AC mV signal through separate left and right audio circuits (+ and -) to the radio. The voltage



amount and rate of change is dependent upon the type of signal being received. The radio then processes these signals and passes the audio to the



appropriate speakers or amplifier.



Conditions for Running the DTC



The ignition is ON.



Conditions for Setting the DTC



B1259 02



The DRR detects a short to ground in the antenna circuit.



B1259 05



The DRR detects a short to voltage or an open in the antenna circuit.



Action Taken When the DTC Sets



The radio displays No XM Signal.



Conditions for Clearing the DTC



* A current DTC will clear when the conditions for setting the DTC are no longer present.



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



Diagnostic Aids



When diagnosing digital radio concerns, the vehicle should be located outside with an unobstructed view of the southern sky to ensure proper



reception of the satellite signal. Reception may limited, intermittent or not possible inside structures or under heavy cover.



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



Radio/Audio System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Radio/Audio 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

2016 GMC Truck Acadia AWD V6-3.6L Technical Service Bulletin # 00-05-22-002L Date: 090326

2016 GMC Truck Acadia AWD V6-3.6L Technical Service Bulletin # 00-05-22-002L Date: 090326



Brakes- Disc Brake Warranty Service And Procedures



INFORMATION



Bulletin No.: 00-05-22-002L



Date: March 26, 2009



Subject:



Disc Brake Warranty Service and Procedures



Models:



1999-2010 GM Passenger Cars and Light Duty Trucks



2003-2010 HUMMER H2



2006-2010 HUMMER H3



1999-2004 Isuzu Light Duty Trucks (Canada Only)



2005-2009 Saab 9-7X (Canada Only)



1999-2010 Saturn Vehicles (Canada Only)



EXCLUDING 2009-2010 Chevrolet Corvette ZR1



Supercede:



This bulletin is being revised to inform you that due to improvements in vehicle brake corner and wheel design, assembly plant build processes and



dealership required tools like the On-Car Lathe, measuring for Lateral Run Out (LRO) is no longer a required step when performing base brake



service. Due to this change, you are no longer required to enter the LRO measurement on the repair order or in the warranty system failure code



section. The bulletin information below and the base brake labor operations have been updated accordingly. Due to this change it is more important



than ever to properly maintain your brake lathe (per the Brake Lathe Calibration Procedure in this bulletin). Please discard Corporate Bulletin



Number 00-05-22-002K (Section 05 - Brakes).



For your convenience, this bulletin updates and centralizes all GM's Standard Brake Service Procedures and Policy Guidelines for brake rotor and



brake pad service and wear. For additional information, the Service Technical College lists a complete index of available Brake courses. This



information can be accessed at www.gmtraining.com > resources > training materials > brakes courseware index. In Canada, refer to Service Know



How course 55040.00V and Hydraulic Brake Certification program 15003.16H.



Important



PLEASE FAMILIARIZE YOURSELF WITH THESE UPDATES BEFORE PERFORMING YOUR NEXT GM BRAKE SERVICE.



The following four (4) key steps are a summary of this bulletin and are REQUIRED in completing a successful brake service.



1. Measure and Document Pre-Service Rotor Thickness* (REQUIRED on Repair Order) - determine rotor clean-up/refinish/replace



2. Properly clean ALL brake corner mating surfaces - hub, rotor and wheel



3. Properly clean-up/refinish rotor, measure and document post-service rotor thickness (REQUIRED on Repair Order)



Important



If it is determined the rotor needs to be refinished, verify lathe equipment is properly calibrated.



4. Properly reassemble the brake corner using proper torque tools, torque specification and torque sequence - wheel lug nuts.



* The bulletin refers to Minimum Thickness specification as the minimum allowable thickness after refinish. Always refer to SI to verify the



spec stamped on the rotor is the minimum thickness spec after refinish and not the discard spec.



2016 GMC Truck Acadia AWD V6-3.6L Page 187



Bulletin Format



***REPAIR ORDER REQUIRED DOCUMENTATION



2016 GMC Truck Acadia AWD V6-3.6L Page 188



Important



When using any one of the brake labor operations listed in this bulletin (except for H9709 - Brake Burnish), the following two rotor measurements



(1. Original Rotor Thickness, 2. Refinished Rotor Thickness are required and MUST be written/documented on the repair order, or for your



convenience, complete the form (GM Brake Service Repair Order Documentation for Required Measurements) shown above and attach it to the



repair order. If the Warranty Parts Center generates a request, this Documentation/Form must be attached to the repair order that is sent back.



Important



Documentation of brake lathe maintenance and calibration as recommended by the lathe manufacturer must be available for review upon request.



Repair Order Documentation - Rotor Original And Refinished Thickness - REQUIRED



When resurfacing a brake rotor or drum, the ORIGINAL thickness (measured thickness before refinish) and REFINISHED thickness (measured



thickness after refinish) MUST be written/documented on the repair order hard copy for each rotor serviced. If a rotor replacement is necessary, only



the original thickness measurement needs to be recorded.



Repair Order Documentation - Explanation of Part Replacement - REQUIRED



If replacement of a brake component is necessary, proper documentation on the repair order is required. See the following examples:



^ Brake rotor replacement - Customer comment was brake pulsation. Rotor was refinished on a prior brake service. After rotor measurement, it



was determined that refinishing the rotor again would take it under the Minimum Thickness specification.



^ Brake pad replacement - Customer comment was brake squeak noise. On inspection, found pads contaminated by fluid leak at caliper.



TOOL INFORMATION



CORRECTION PLATE PART INFORMATION



Refer to TSB 01-05-23-001 for the Brake Align(R) application chart.



For vehicles repaired under warranty, Brake Align(R) Run-Out Correction Plates should be submitted in the Net Amount at cost plus 40%. Brake



Align(R) Run-Out Correction Plates are available through the following suppliers:



- Dealer Equipment and Services



- Brake Align(R) LLC (U.S. Dealers Only)



* We believe this source and their products to be reliable. There may be additional manufacturers of such products. General Motors does not



endorse, indicate any preference for or assume any responsibility for the products from this firm or for any such items, which may be available from



other sources.



2016 GMC Truck Acadia AWD V6-3.6L Page 189



WARRANTY INFORMATION



2016 GMC Truck Acadia AWD V6-3.6L Page 190



WORKSHEET - BRAKE LATHE CALIBRATION



Important



Brake lathe calibration should be performed and recorded monthly or if you are consistently measuring high LRO after rotor refinishing.



Disclaimer



GM Brake Service Procedure



GM BRAKE SERVICE PROCEDURE



1. Remove the wheel and caliper.



2. Measure rotor thickness. In order to determine if the rotor can be refinished, do the following steps:



Important



If performing routine Brake Service for worn pads only, and the rotors are not damaged and measure within specification - DO NOT



REFINISH ROTORS.



1. Remove the rotor(s).



2. Measure the rotor for original thickness using a brake micrometer. Multiple measure points should be taken and the lowest measurement



2016 GMC Truck Acadia AWD V6-3.6L Page 191



should be recorded.



3. Reference the Minimum Thickness specification stamped on the backside of the rotor or SI for Minimum Thickness specification/other. In



most cases, the rotor should be refinished unless the measurement taken makes it obvious that refinishing the rotor would take the



measurement under the Minimum Thickness specification (then replacement is necessary). DO NOT use any other manufacturers rotor



specifications.



3. ***Record the lowest ORIGINAL rotor thickness measurement on the repair order hard copy as noted in the "Repair Order Documentation -



Rotor Refinish" section of this bulletin.



4. Clean all of the mating surfaces between the hub, the rotor and the wheel using the J 42450A - Wheel Hub Cleaning Kit and J 41013 - Whiz



Wheel(R).



If rotors are not to be refinished - Go To Step 8.



Important



Cleaning all mating surfaces and making them free of corrosion, burrs and other debris (which includes removal of Hubless rotors) is



critical and MUST be performed whether using an On-Car or Bench Lathe Refinish Procedure.



5. Be sure to follow the appropriate refinishing procedure listed below for the type of lathe you are using.



Important



Only replace the rotors if they do not meet the Minimum Thickness specification.



Important



DO NOT REFINISH NEW ROTORS.



Important



Only remove the necessary amount of material from each side of the rotor and note that equal amounts of material do not have to be removed



from both sides on any brake system using a floating caliper.



Important



Prior to making the cut, install the recommended clip-on style disc silencer supplied with the lathe. Use of this silencer is critical to prevent



chatter from occurring during the cut.



Bench Type Lathe



1. Refinish the existing rotor on an approved, well-maintained lathe to guarantee smooth, flat and parallel surfaces.



2. Check for clean and true lathe adapters and make sure the arbor shoulder is clean and free of debris or burrs. For more information, see the



"Brake Lathe Calibration Procedure (Bench-Type)" section in this bulletin.



3. On the outboard area of the rotor, position the cutting tools one eighth of an inch into the brake pad area of the rotor. Feed the cutting tools



into the rotor until they cut the rotor to new metal, a full 360 degrees. Zero each dial and back off a full turn



4. Move the cutting bits to the middle of the rotor and do the same procedure. If zero is passed during the process, reset zero. Back off a full



turn.



5. Position the cutting bits one eighth of an inch inside the inboard (closest to the hub) edge of the brake pad contact area. Do the same



procedure. If zero is passed during the process, reset zero.



6. Back off a full turn and position the cutting bits all the way inboard in preparation to refinish the full rotor surface. Advance both tool cutters



to the zero setting plus just enough to clean up the entire rotor surface.



7. After completing the refinish, sand both sides of the rotor for approximately one minute per side using a sanding block and 130-150 grit



sandpaper to obtain a non-directional finish.



On-Car Type Lathe



1. Reinstall the rotor(s).



Important



When using the On-Car lathe on vehicles equipped with limited slip (or posi-trac) rear system, it is critical that the rear drive shaft is



disconnected/disengaged prior to operation of the On-Car lathe. Remember to mark and re-index the drive shaft correctly on re-assembly



to prevent creating driveline vibration. Whenever the lathe drive motor is being switched on, the operator MUST keep their body out of



the wheel well area until the machine has reached its normal operating RPM.



2. Refinish the existing rotor on an approved, well-maintained lathe to guarantee smooth, flat and parallel surfaces.



Important



2016 GMC Truck Acadia AWD V6-3.6L Page 192



When raising the vehicle on the lift, be sure to have it at a good working height (waist high is average) to accommodate mounting the



On-Car lathe. Optimally, the center piston on the lathe trolley will be mid-travel. If the lathe trolley center piston is completely compressed



(bottoming out) or inversely fully extended and hanging off the vehicle hub, this could affect the calibration time of the lathe.



3. Select the correct adapter for the vehicle you're working on and mount it to the hub with the vehicle lug nuts. Hand tighten 34-41 Nm



(25-30 lb ft) the nuts using equal torque. DO NOT use impact wrenches, excessive torque will damage the adapter.



Important



Ensure the adapter sits flush on the rotor hat surface. Be sure to remove any rust, rotor retaining clips, etc. that may preclude the adapter



from sitting flat on the mounting surface.



4. Connect the lathe to the adapter, turn on the lathe and activate the computer to compensate for run-out in the hub.



5. Once the computer indicates the compensation process was successful, on the outboard area of the rotor, position the cutting tools one



eighth of an inch into the brake pad area of the rotor. Feed the cutting tools into the rotor until they cut the rotor to new metal, a full 360



degrees. Zero each dial and back off a full turn.



6. Move the cutting bits to the middle of the rotor and do the same procedure. If zero is passed during the process, reset zero. Back off a full



turn.



7. Position the cutting bits one eighth of an inch inside the inboard (closest to the hub) edge of the brake pad contact area. Do the same



procedure. If zero is passed during the process, reset zero.



8. Back off a full turn and position the cutting bits all the way inboard in preparation to refinish the full rotor surface. Advance both tool



cutters to the zero setting plus just enough to clean up the entire rotor surface.



9. After completing the refinish, sand both sides of the rotor for approximately one minute per side using a sanding block and 130-150 grit



sandpaper to obtain a non-directional finish.



10. Dismount the lathe, but leave the lathe adapter attached to the vehicle.



6. Once the rotor has been properly machined, wash the rotor with soap and water (use a mild dish washing soap) or wipe it clean with GM



approved brake cleaner, P/N 88862650 (Canadian P/N 88901247).



Important



Thoroughly cleaning the rotor will prevent the possible transfer of finite metal dust left as a by-product of machining to the pad material



during the seating process, thus reducing the opportunity for squeaks or other noises to occur.



7. ***Record the REFINISHED rotor thickness measurement on the repair order hard copy. Refer to the "Repair Order Documentation - Rotor



Refinish" section of this bulletin.



8. Setting up to measure for Lateral Run Out (LRO):



Important



Measuring for Lateral Run Out (LRO) (steps 8 - 15) is no longer required however, these steps are being left in the overall procedure as a



good check to be performed in the case of a repeat pulsation complaint. If you are not checking for LRO, go to step 16.



Bench-Type Lathe



1. Ensure that the mating surfaces of the rotor hat section and the hub mating surface are clean and free of debris.



2. Mount the new, original or refinished rotor onto the vehicle hub.



Important



Always hold the rotor on the bottom half so any debris that may be dislodged from the vents will fall out instead of falling into the



mounting area. Any movement or jarring from the rotor falling over on the studs can release rust from the vents on the rotor.



3. Tilt the top of the rotor in towards the vehicle so you can see the studs and ease the rotor onto the studs.



4. Slide the rotor all the way to the hub and hold it in place until you have placed one of the conical washers (with the tapered hole side



facing out) and run the first lug nut up tight by hand so the rotor doesn't move when you release it.



5. Place the conical washers on the rest of the studs (with the tapered hole side facing out), start and snug the lug nuts by hand.



6. Using the one half inch drive impact wrench and a torque stick (J 39544) or equivalent, start with the lug nut opposite of the one you first



tightened by hand and tighten the lug nuts using a star pattern until they touch the hub but do not completely torque. Then again, starting



with the first lug nut you tightened by hand, tighten all the lug nuts in a star pattern to the specific vehicle torque specification.



7. DO NOT reinstall the caliper or the wheel at this time.



2016 GMC Truck Acadia AWD V6-3.6L Page 193



On-Car Type Lathe



1. Leave the On-Car adapter on the wheel.



2. Proceed to Step 9.



9. Fasten the dial indicator to the steering knuckle so that the indicator needle contacts the rotor outboard friction surface approximately 6.35 mm



(0.25 in) from the rotor's outer edge. The stylus should be perpendicular to the friction surface of the rotor.



Important



Make sure the dial indicator needle tip is screwed tight, a loose tip could cause false readings.



10. Measure for LRO. Follow the procedure below to determine if the LRO is within specification (0.050 mm (0.002 in) or LESS).



1. Rotate the rotor and locate the point on the rotor where the lowest dial indicator reading is indicated and set the dial indicator to zero.



2. Rotate the rotor from the low point and locate the point with the highest dial indicator reading (rotor "high spot"). Note the amount and



mark the location of the "high spot" on the rotor and mark the closest wheel stud relative to this location. If the high point falls between



two studs, mark both studs. In instances where the vehicle has "capped lug nuts" you should mark the hub.



11. If the Lateral Run Out (LRO) measurement is 0.050 mm (0.002 in) or LESS, no correction is necessary. Go to Step 15 if this is the first rotor



completed. Go to Step 16 if this is the second rotor completed. If the LRO is GREATER than 0.050 mm (0.002 in), go to Step 12.



12. If the LRO measurement is greater than 0.050 mm (0.002 in), use the following procedure to correct for LRO:



Important



If the LRO measurement is over 0.279 mm (0.011 in), determine the source or cause of the LRO and correct it (i.e. verify drive axle nut torque



specification, refinished rotor is source of LRO due to a lathe qualification issue - see "Brake Lathe Calibration Procedure").



Hubless Rotor



1. Remove the rotor and using the Brake Align(R) application chart (found in TSB 01-05-23-001B), choose the correct plate to bring the



rotor LRO to 0.050 mm (0.002 in) or less. The plates come in 0.0762 mm (0.003 in), 0.1524 mm (0.006 in) and 0.2286 (0.009 in)



compensation. For more information on proper plate selection, see the instruction video/DVD included in the "Brake Align(R)" kit or TSB



01-05-23-001B.



2. Align the V-notch of the selected Brake Align(R) correction plate to the marked wheel stud ("high spot") or between the two points



marked (if the "high spot" is between two wheel studs).



Important



IF Brake Align(R) Correction Plates are not available for the vehicle being serviced, refer to SI Document - Brake Rotor Assembled



Lateral Runout Correction for correcting LRO.



Important



Per Brake Align(R) manufacturer, NEVER attempt to stack two or more Correction Plates together on one hub. NEVER attempt to reuse a



previously installed Correction Plate.



3. Reinstall the rotor using the same method and precautions as the first time - found in Step 8. Make sure to index the rotor correctly to the



marks made in step 10, otherwise LRO will be comprised.



Hubbed / Captured / Trapped Rotor



1. Measure the rotor thickness.



2. Refinish or replace the rotor (see Service Information for further details).



13. Use a Dial Indicator to measure the rotor to verify the LRO is within specification.



14. If using,



BENCH LATHE - DO NOT remove conical washers and lug nuts at this time.



ON-CAR LATHE - You must remove adapter and install conical washers and lug nuts to retain rotor position.



Important



For Hubless rotor design, while removing the adapter, you must hold the rotor tight to the hub and install the top conical washer and lug nut



first to ensure no debris falls between the surface while removing the adapter. Then, install the remaining conical washers and lug nuts.



Otherwise, LRO will be comprised.



2016 GMC Truck Acadia AWD V6-3.6L Page 194



15. Perform Steps 1 through 7 on the opposite side of the vehicle (steps 1-12, if performing LRO).



16. Reinstall the rotors on both sides of the vehicle and perform the following steps:



1. Reinstall the calipers and pads.



2. Pump the brakes to pressurize the calipers.



3. Remove the lug nuts/conical washers.



4. Install and properly torque the wheels.



Important



It is critical to follow the star pattern wheel torque procedure and use the proper tools (torque stick or torque wrench) as referenced in SI.



17. Road test the vehicle to verify the repairs.



Brake Lathe Calibration Procedure



BRAKE LATHE CALIBRATION PROCEDURE



Calibration of the brake lathe should be performed and recorded monthly or whenever post-service brake rotor LRO measurements are consistently



reading above specification.



BENCH-TYPE LATHE



Use the following procedure to calibrate a Bench-type brake lathe:



1. After refinishing a rotor, loosen the arbor nut and while holding the inside bell clamp to keep it from rotating, rotate the rotor 180 degrees.



2. Retighten the arbor nut and set the dial indicator on the rotor using the same instructions as checking the run out on the vehicle.



3. Rotate the arbor and read the runout.



4. Divide the reading by two and this will give you the amount of runout the lathe is cutting into the rotor.



Important



If there is any runout, you will need to machine the inside bell clamp in place on the lathe (this procedure is for a Bench type lathe ONLY, DO



NOT machine inside the bell clamp on an On-Car type lathe).



Machining the Inside Bell Clamp (Bench Type Lathe Only)



Any nicks or burrs on the shoulder of the arbor must be removed. An 80-grit stone can be used to accomplish this. Spray WD-40(R) on the shoulder



and with the lathe running, hold the stone flat against the shoulder surface using slight pressure. When the burrs are gone, clean the surface. Burrs



must also be removed from the hub of the inside bell clamp. This can be accomplished with the stone and WD-40(R). Keep the stone flat on the hub



while removing the burrs. After removing the burrs, clean the hub.



Place the bell clamp on the arbor of the lathe and use the small radius adapters first and then spacers to allow you to tighten the arbor nut to secure



the bell clamp to the lathe. Position the tool bit in the left hand of the rotor truer so you can machine the face of the bell clamp. Machine the face of



the bell clamp taking just enough off of it to cut the full face of the clamp the full 360 degrees. Before you loosen the arbor nut, match mark the hub



of the bell clamp to the arbor and line up these marks before machining a rotor. A magic marker can be used to make the match marks. Machine a



rotor and recheck the calibration. Repeat this procedure on all Inside Bell Clamps used.



Important



If runout is still present, contact the brake lathe supplier.



ON-CAR TYPE LATHE



Use the following procedure to calibrate an On-Car brake lathe:



1. Connect the lathe to a vehicle using the appropriate adapter.



2. Attach a vise-grip dial indicator to a fixed point in the wheel well and bring the dial indicator to a flat surface on the cutting head.



3. Turn on the lathe and press the "start" button so the lathe begins to compensate.



4. Once compensation is complete, note the runout as measured by the dial indicator. Measured runout at this point is overstated given that it is



outside the rotor diameter.



2016 GMC Truck Acadia AWD V6-3.6L Page 195



5. If runout is in excess of 0.1016 mm (0.004 in) (0.050 mm (0.002 in) as measured within the rotor diameter), calibration must be tightened.



Follow manufacturer's instructions for tightening the calibration of the lathe. This information is found in the manual supplied with the lathe.



Important



If the machine is taking a long time to compensate during normal use, prior to checking the lathe calibration, it is recommended that the



machine be disconnected from the adapter and the adapter (still connected to the vehicle) is rotated 180 degrees and the machine reattached.



This will accomplish two things: - It will re-verify the machine is properly attached to the adapter. - It will change the location of the runout



(phase) relative to the machine and thus possibly allow for quick compensation as a result of the position change.



The following information has been added as a reference to ensure your Pro-Cut PFM lathe provides a consistent smooth surface finish over long



term usage.



Cutting Tips / Depth of Cut / Tip Life



The cutting tips must be right side up. Reference marks always face up. The cutting tips may not have chips or dings in the surface of the points. Cuts



of 0.1016-0.381 mm (0.004-0.015 in) will provide the best surface finish and the optimal tip life. When cleaning or rotating the cutting bits, make



sure that the seat area for the tip on the tool is free and clear of debris.



Cutting Head



On each brake job, the technician must center the cutting head for that particular vehicle using one of the mounting bolt holes on the slide plate.



Once the head is centered, it is vital that the technician use one hand to push the head firmly and squarely back into the dovetail on the slide plate



while using the other hand to tighten the Allen-Hex bolt that secures the head. Failure to do this could result in chatter occurring during the cut.



Tool Holder Plate (Cutting Head)



The tool holder plate is the plate that the cutting arms are attached to. It can bend or break if a technician accidently runs the cutting arms into the



hub of the rotor while the rotor is turning. (Cuts of more than 0.508 mm (0.020 in) can also bend this plate). Once bent, the lathe will most likely not



cut properly until the tool holder plate is replaced. In order to verify the condition of the tool holder plate on a machine that will not cut right,



remove the mounting bolt and remove the cutting head from the slide plate. With the cutting head titled at an angle, lay the long edge of the tool



holder plate down on the flat part of the slide plate. If any gap can be seen between the edge and the slide plate, the tool holder plate is bent and the



source of vibration. Also check to ensure that the cutting arms are lying flat on the upper side of the tool holder plate. If the mounting arm post is



bent, it will show itself by having the back of the cutting arm lifting off the surface of the tool holder.



Gib Adjustment / Loose Gib



As wear occurs between the slide plate and the box it rides on, you must take up the slack. You do this by way of a moveable wedge, which we call



the gib. Your lathe manual details adjustment process, which you should perform when required after monthly checks or whenever surface finish is



inconsistent.



Brake Pulsation



BRAKE PULSATION



Brake pulsation is caused by brake rotor thickness variation. Brake rotor thickness variation causes the piston in the brake caliper, when applied, to



"pump" in and out of the caliper housing. The "pumping" effect is transmitted hydraulically to the brake pedal. Brake pulsation concerns may result



from two basic conditions:



1. Thickness Variation Pulsation is Caused by Lateral Run Out (LRO). LRO on a brake corner assembly is virtually undetectable unless



measured (with a dial indicator after the brake service) and will not be detected as brake pulsation during an after brake service test drive. If



the brake corner is assembled with excessive LRO (greater than 0.050 mm (0.002 in), thickness variation will develop on the brake rotor over



time and miles. Excessive LRO will cause the brake pads to wear the brake rotors unevenly, which causes rotor thickness variation. Pulsation



that is the result of excessive Lateral Run Out usually develops in 4,800-16,000 km (3,000-10,000 mi). The more excessive the LRO, the



faster the pulsation will develop. LRO can also be induced when uneven torque is applied to wheel nuts (lug nuts). Improper wheel tightening



after tire rotation, spare tire usage, brake inspection, etc. can be the cause of brake pulsation. Again, it usually takes 4,800-16,000 km



(3,000-10,000 mi) AFTER the service event for the condition to develop. The customer does not usually make the connection between the



service event and the awareness of the pulsation. The proper usage of torque wrenches and/or torque sticks (torque limiting sockets) will



greatly reduce or eliminate the pulsation conditions after wheel service events. The improper use of impact wrenches on wheel nuts greatly



increases the likelihood of pulsation after wheel service.



The following are examples of pulsation conditions and reimbursement recommendations:



- If the customer noticed the condition between 4,800-16,000 km (3,000-10,000 mi) and it gradually got worse, normally the repair would



be covered. The customer may tolerate the condition until it becomes very apparent.



- If a GM dealer performed a prior brake service, consider paying for the repair and then strongly reinforce proper brake lathe



maintenance.



- If the customer had the brake service done outside of a GM dealership, normally GM would not offer any assistance.



- If a customer indicated they had wheel service, ask who performed the service. Then;



2016 GMC Truck Acadia AWD V6-3.6L Page 196



- If a GM dealer performed the service, consider paying for the repair and then strongly reinforce the use of torque sticks at the dealer.



Two common size torque sticks cover 90% of all GM products. Each technician needs to use torque sticks properly every time the



wheel nuts are tightened.



- If the customer had the wheel service done outside of a GM dealership, normally GM would not offer any assistance.



2. Thickness Variation Pulsation Caused by Brake Rotor Corrosion - Rotor corrosion is another form of thickness variation, which can cause a



pulsation concern and can be addressed as follows:



- Cosmetic Corrosion:



In most instances rotor corrosion is cosmetic and refinishing the rotor is unnecessary.



- Corrosion - Pulsation Caused by Thickness Variation (Lot Rot / Low Miles - 0-321 km (0-200 mi):



At times more extensive corrosion can cause pulsation due to thickness variation. This usually happens when the vehicle is parked for long



periods of time in humid type conditions and the braking surface area under the pads corrodes at a different rate compared to the rest of the



braking surface area. Cleaning up of braking surfaces (burnishing) can be accomplished by 10 - 15 moderate stops from 56- 64 km/h (35 -



40 mph) with cooling time between stops. If multiple moderate braking stops do not correct this condition, follow the "Brake Rotor



Clean-Up Procedure" below.



- Corrosion - Pulsation Caused by Thickness Variation (without rotor flaking / higher mileage - 3,200-8,000 km (2,000-5,000 mi):



In some cases, more extensive corrosion that is not cleaned up by the brake pad over time and miles can cause the same type of pulsation



complaint due to thickness variation. In these cases, the rotor surface is usually darker instead of shiny and a brake pad foot print can be



seen against the darker surface. This darker surface is usually due to build-up, on the rotor material surface, caused by a combination of



corrosion, pad material and heat. To correct this condition, follow the "Brake Rotor Clean-up Procedure" below.



- Corrosion - Pulsation Caused by Thickness Variation (with rotor flaking / higher mileage - 8,000 + km (5,000 + miles) :



At times, more extensive corrosion over time and miles can cause pulsation due to thickness variation (flaking). This flaking is usually a



build up, mostly on the rotor material surface, caused by a combination of corrosion, pad material and heat. When rotor measurements are



taken, the low areas are usually close to the original rotor thickness (new rotor) measurement and the high areas usually measure more than



the original rotor thickness (new rotor) measurement (depending on mileage and normal wear). To correct this condition, follow the



"Brake Rotor Clean-up Procedure" described below.



Important



In some flaking instances, cleaning-up this type of corrosion may require more rotor material to be removed then desired. Customer



consideration should be taken in these situations and handled on a case by case basis, depending on the amount/percentage of rotor life



remaining and the vehicle's warranty time and miles.



Brake Rotor Clean-Up Procedure



BRAKE ROTOR CLEAN-UP PROCEDURE



Clean-up the rotors on an approved, well-maintained brake lathe to guarantee smooth, flat and parallel surfaces. Check for clean and true lathe



adapters and make sure the arbor shoulder is clean and free of debris or burrs. For more information see the "Brake Lathe Calibration Procedure"



section in this bulletin.



1. On the outboard area of the rotor, position the cutting tools one eighth of an inch into the brake pad area of the rotor. Feed the cutting tools



into the rotor until they cut the rotor to new metal, a full 360 degrees. Zero each dial and back off a full turn.



2. Move the cutting bits to the middle of the rotor and do the same procedure. If zero is passed during the process, reset zero. Back off a full turn.



3. Position the cutting bits one eighth of an inch inside the inboard (closest to the hub) edge of the brake pad contact area. Do the same



procedure. If zero is passed during the process, reset zero.



4. Back off a full turn and position the cutting bits all the way inboard in preparation to refinish the full rotor surface. Advance both tool cutters



to the zero setting plus just enough to clean up the entire rotor surface.



5. After completing the refinish, sand both sides of the rotor for approximately one minute per side using a sanding block and 130-150 grit



sandpaper to obtain a non-directional finish.



Important



Only remove the necessary amount of material from each side of the rotor and note that equal amounts of material do not have to be removed



from both sides on any brake system using a floating caliper.



Important



In many of these instances, such a minimal amount of material is removed from the rotor that customer satisfaction is not a concern for future



brake services. This procedure is intended to "Clean-up" the rotor surface and should be conveyed to the customer as such - not as "cut",



2016 GMC Truck Acadia AWD V6-3.6L Page 197



"refinish" or "machine", which tends to be terms understood as a substantial reduction of rotor material/life. If the brake lathe equipment being



used is not capable of removing minor amounts of material while holding tolerances, further lathe maintenance, repair, updates or equipment



replacement may be necessary.



Brake Noise



BRAKE NOISE



Some brake noise is normal and differences in loading, type of driving, or driving style can make a difference in brake wear on the same make and



model. Depending on weather conditions, driving patterns and the local environment, brake noise may become more or less apparent. Verify all



metal-to-metal contact areas between pads, pad guides, caliper and knuckles are clean and lubricated with a thin layer of high temperature silicone



grease. Brake noise is caused by a "slip-stick" vibration of brake components. While intermittent brake noise may be normal, performing 3 to 4



aggressive stops may temporarily reduce or eliminate most brake squeal. If the noise persists and is consistently occurring, a brake dampening



compound may be applied to the back of each pad. This allows parts to slide freely and not vibrate when moving relative to each other. Use Silicone



Brake Lubricant, ACDelco P/N 88862181 (Canadian P/N 88862496) or equivalent.



The following noises are characteristics of all braking systems and are unavoidable. They may not indicate improper operation of the brake system.



Squeak/Squeal Noise:



- Occurs with front semi-metallic brake pads at medium speeds when light to medium pressure is applied to the brake pedal.



- Occasionally a noise may occur on rear brakes during the first few stops or with cold brakes and/or high humidity.



Grinding Noise:



- Common to rear brakes and some front disc brakes during initial stops after the vehicle has been parked overnight.



- Caused by corrosion on the metal surfaces during vehicle non-use. Usually disappears after a few stops.



Groan Noise:



A groan type noise may be heard when stopping quickly or moving forward slowly from a complete stop. This is normal. On vehicles equipped with



ABS, a groan or moan type noise during hard braking applications or loose gravel, wet or icy road conditions is a normal function of the ABS



activation.



Key Points - Frequently Asked Questions



KEY POINTS - FREQUENTLY ASKED QUESTIONS



- Q: How do on-car lathes react to Axle Float? Does the play affect the machining of the rotor, either surface finish or LRO?



A: Because the Pro-Cut on-car lathe adjusts in a live mode while spinning the hub/rotor, the dynamics of a floating axle are effectively



eliminated. Once the lathe is compensated, there is no difference in the cutting/surface finish and LRO are just the same as with a non-floating



axle.



- Q: Which lathe is essential for performing brake work, the bench or on-car?



A: Dealers must have a well maintained bench lathe and well maintained on-car lathe. These lathes need to be calibrated on a monthly basis.



BOTH lathes are essential to providing quality brake service.



- Q: What is the expected tip life for an on-car lathe?



A: The geometry and composition of the Pro-Cut tips are designed for "single pass" cutting. When using the Pro-Cut the cutting depth should



be set to take all material needed to get below rust grooves, eliminate all run-out and resurface the entire disc in a single pass. Cuts of



0.1016-0.381 mm (0.004-0.015 in) will provide the best surface finish and the optimal tip life. No "skim cut" or "finish cut" is needed. Failure



to follow this procedure will shorten tip life. The Pro-cut tips will last between 7-12 cuts per corner. With three usable corners, a pair of tips is



good for at least 21 cuts.



- Q: Why does GM recommend the use of single pass (referred to as "positive rake") bench and on-car brake lathes?



A: GM Service and GM Brake Engineering have performed competitive evaluations on a significant number of bench and on-car brake lathes.



These tests measured critical performance characteristics such as flatness, surface finish and the ability of the lathe to repeat accuracy over



many uses. In each test, single pass lathe designs out performed the competitors. Single pass brake lathes are more productive requiring less



time to perform the same procedure.



- Q: Is it okay to leave the caliper/pads installed while cutting rotors using an on-car lathe?



A: On-car lathes should never be used with the pads and calipers installed on the vehicle. The debris from cutting the rotors can contaminate



the brake pads/calipers which can lead to other brake concerns and comebacks.



2016 GMC Truck Acadia AWD V6-3.6L Page 198



- Q: What information needs to be documented on the Repair Order?



A: Any claim that is submitted using the labor operations in this bulletin, must have the Original Rotor Thickness and Refinish Rotor



Thickness (if refinished) documented on the repair order. For more information, refer to the "Repair Order Required Documentation" section



of this bulletin.



All Warranty Repair Orders paid by GM, are subject to review for compliance and may be debited where the repair does not comply with this



procedure.



Brake Warranty



BRAKE WARRANTY



Brake Rotors:



- Brake rotor warranty is covered under the terms of the GM New Vehicle Limited Warranty. Reference the vehicle's warranty guide for



verification.



- Rotors should not be refinished or replaced during normal/routine pad replacement.



- Rotors should not be refinished or replaced and is ineffective in correcting brake squeal type noises and/or premature lining wear out.



- Rotors should not be refinished or replaced for cosmetic corrosion. Clean up of braking surfaces can be accomplished by 10-15 moderate



stops from 56-64 km/h (35-40 mph) with cooling time between stops.



- Rotors should not be refinished or replaced for rotor discoloration/hard spots.



- Rotors should be refinished NOT replaced for Customer Pulsation concerns. This condition is a result of rotor thickness variation, usually



caused by LRO (wear induced over time and miles) or corrosion (Lot Rot).



- When rotor refinishing, only remove the necessary amount of material from each side of the rotor and note that equal amounts of material do



not have to be removed from both sides on any brake system using a floating caliper.



- Rotors should be refinished for severe scoring - depth in excess of 1.5 mm (0.060 in).



Important



If the scoring depth is more than 1.5 mm (0.060 in) after the rotor is refinished, it should be replaced.



- It is not necessary to replace rotors in pairs. Rotors may be replaced individually. However, caution should be exercised, as a variance in



surface finish may cause a brake pull condition.



- New rotors should not be refinished before installation. Original equipment rotor surfaces are ground to ensure smooth finish and parallelism



between mounting and friction surfaces. If a new rotor has more than 0.050 mm (0.002 in) Lateral Run Out (LRO) when properly mounted on



the hub, correct it using one of the following methods:



1. For hubless rotor designs, use the correction plate procedure found in the "GM Brake Service Procedure for Hubless Rotors" outlined in



this bulletin.



2. For hubbed/trapped/captured rotor designs, refinish the rotor using an On-Car lathe and the procedure outlined in this bulletin.



- Never reuse rotors that measure under the Minimum Thickness specification. In this instance, the rotor should be replaced.



Important



If the Minimum Thickness specification is not visible on the rotor, reference Service Information (SI) for the specific vehicle application. DO



NOT use any other manufacturers rotor specifications.



Brake Pads:



Important



When determining the warranty coverage (as an example) - if all four front or four rear brake pads are excessively worn evenly, that would



NOT be covered under warranty since this type of wear is most likely due to driving habits or trailering. However, if the brake pads are



excessively worn un-evenly, side-to-side or same side/inner-to-outer pads, then consideration should be given to cover this under warranty



since this type of wear is most likely due to poor operation of other braking components.



- Consideration should be given for covering brake pads up to 39,000 km (24,000 mi) (excluding owner abuse, excessive trailering, or the



situations that would not be considered normal use).



- Installation of new rotors does not require pad replacement. Do not replace pads unless their condition requires it - excessively worn, damage



or contaminated.



2016 GMC Truck Acadia AWD V6-3.6L Page 199



Brake Wear:



Several factors impact brake lining wear and should be taken into account when reviewing related issues:



- heavy loads / high temperatures / towing / mountainous driving / city driving / aggressive driving / driver braking characteristics (left foot or two



feet)



The following are conditions that may extend brake lining wear:



- light loads / highway driving / conservative driving / level terrain

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 468


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 6 and control circuit terminal 4.



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 10 X4 and the low reference circuit terminal 7 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.



5. Connect the X1, X2, X4 harness connectors at the HSM.



6. Disconnect the harness connector at the seat back heater element/temperature sensor.



7. 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 HSM.



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



HSM.



8. If all circuits test normal, replace the HSM.



Repair Instructions



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



* Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2) ()Driver or Passenger Seat Back Cushion Heater



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



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



HP2 or Dealer Installed W/O Memory



DTC B1925 or B2170 (HP2 or Dealer Installed w/o Memory)



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 B1925 02



- Left Seat Heater Cushion Sensor Circuit Shorted to Ground



DTC B1925 05



- Left Seat Heater Cushion Sensor Circuit Shorted to Battery or Open



DTC B2170 02



- Right Seat Heater Cushion Sensor Circuit Shorted to Ground



DTC B2170 05



- Right Seat Heater Cushion Sensor Circuit Shorted to Battery or Open



Diagnostic Fault Information

Tuesday, March 26, 2019

2016 GMC Truck Acadia AWD V6-3.6L Technical Service Bulletin # 09-02-34-001B Date: 110615

2016 GMC Truck Acadia AWD V6-3.6L Technical Service Bulletin # 09-02-34-001B Date: 110615



Steering - Squeak/Rattle Noise from Steering Column



TECHNICAL



Bulletin No.: 09-02-34-001B



Date: June 15, 2011



Subject: Squeak / Rattle Noise from Steering Column (Align Arrow on Rubber Grommet with Line on Dash Mat)



Models:



2008-2012 Buick Enclave



2009-2012 Chevrolet Traverse



2007-2012 GMC Acadia



2007-2010 Saturn OUTLOOK



Supercede:



This bulletin is being revised to update the model years to 2012. Please discard Corporate Bulletin Number 09-02-34-001A (Section 02 - Steering).



Condition



Some customers may comment on a squeak or rattle noise from the steering column area. Upon further investigation, the technician may find the



noise coming from the steering column I-Shaft grommet.



Cause



This condition may be caused by incorrect alignment of the pass-through grommet, located on the steering column I-Shaft. Due to the shape of the



hole in the dash, the grommet must be aligned properly. The alignment arrow (1) on the rubber grommet should align with the line (2) on the dash



mat. This can be seen from inside the vehicle, directly behind the brake pedal.



Correction



1. Verify the customer's concern.



2016 GMC Truck Acadia AWD V6-3.6L Page 140



2. Locate the arrow and line marks by the brake pedal (1).



3. Remove the instrument panel insulator panel. Refer to Instrument Panel Insulator Panel Replacement in SI.



Important



The arrow aligned with the dash mat line allows the grommet to sit properly in the hole.



4. Rotate the rubber grommet back into alignment by hand turning until the arrow (1) and line (2) match up.



5. Reinstall the instrument panel insulator panel.



Warranty Information



For vehicles repaired under warranty, use the table.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 495


This DTC will set, if the MSM is controlling a motor in one direction and its position sensor is tracking the motor in the opposite direction. The



sensor is either mounted or wired incorrectly, or the polarity of the motor control circuits are reversed.



Action Taken When the DTC Sets



The MSM disables the memory recall and easy exit/entry action commands of the motor monitored by the sensor. The motor will respond to manual



positioning commands.



Conditions for Clearing the DTC



* The current DTC will clear and set to history, when the MSM sees the analog input from the sensor as between 0.22-4.75 volts and the



ignition is cycled OFF then back to ACC or RUN.



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



Diagnostic Aids



* All position sensors use common ground and 5-volt reference circuits.



* If the 5-volt reference circuit is shorted to voltage, multiple codes will set.



* If the 5-volt reference circuit is shorted to ground, multiple codes will set.



* If the sensor ground circuit is open, multiple codes will set.



Reference Information



Schematic Reference



Driver Seat Schematics ()



Connector End View Reference



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



Description and Operation



Memory Seats 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, observe the scan tool Driver Position Module driver seat and lumbar position sensor parameters. The readings should be between



0.22-2.75 volts and change while adjusting seat and lumbar positions.



Circuit/System Testing



B1825 01 or B1825 06



1. Ignition OFF, disconnect the harness connector at the seat recline position sensor.



2. Test for less than 2 ohms between the low reference circuit terminal 1 and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.



3. Ignition ON, 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 MSM.



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 MSM.



4. Verify the scan tool Driver Seat Recline Sensor parameter is less than 1 volt.



锟斤拷 If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the MSM.