2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1232

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1232

motor generator housing and flows to the transmission cooler supply line. The supply line connects to the cooler. From the cooler, the fluid returns

through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the fluid returns to the oil pan. A

non-serviceable motor temperature sensor (MTS) is located in each drive motor generator assembly.

Conditions for Running the DTC

DTC P0A31 is not set.

Conditions for Setting the DTC

The MTS is greater than 200掳C (392掳F) for 3 seconds, and has not fallen below 135掳C (275掳F).

Action Taken When the DTC Sets

* DTC P0A35 is a Type B DTC.

* The hybrid powertrain control module (HPCM) commands the battery energy control module (BECM) to open the high voltage contactor

relays.

Conditions for Clearing the DTC

DTC P0A35 is a Type B DTC.

Diagnostic Aids

* The driver information center (DIC), if equipped, will display 'TRANSMISSION HOT- Idle Engine' when the transmission fluid temperature

(TFT) is more than 132掳C (270掳F) for 10 minutes.

* Ask about the customer's driving habits, trailer towing, etc.

* Ensure the engine cooling system is functioning normally.

* The HPCM will reduce drive motor generator torque at temperatures greater than 160掳C (320掳F). Drive motor generator torque is reduced to

zero if the temperature reaches 190掳C (374掳F).

Reference Information

Schematic Reference

Hybrid Controls 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

1. Review the Failure Records when the DTC set.

瀚慖f the engine coolant temperature (ECT) was above 125掳C (257掳F) when the DTC set, go to Symptoms - Engine Cooling (See: Engine,

Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Cooling) and

correct that concern first.

2. Perform the Transmission Fluid Cooler Flushing and Flow Test (J 45096) (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Symptom Related Diagnostic Procedures/2ML70 - Automatic Transmission/Transmission

Fluid Cooler Flushing and Flow Test (J 45096)).

Circuit/System Testing

1. Review the Failure Records when the DTC set.

2. Compare the MTS values for each drive motor generator.