2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1156

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1156

The hybrid battery temperature sensor is in normal operating range, but is 15掳C (59掳F) different from the other 3 sensors.

P0A9D, P0AC7, P0ACC, and P0AEA

The hybrid battery temperature is greater than 95掳C (203掳F) and one other temperature sensor is less than 70掳C (158掳F).

P0A9E, P0AC8, P0ACD, and P0AEB

The hybrid battery temperature is less than -40掳C (-40掳F).

Action Taken When the DTC Sets

* DTCs P0A9C, P0A9D, P0A9E, P0AC6, P0AC7, P0AC8, P0ACB, P0ACC, P0ACD, P0AE9, P0AEB, and P0AEA are type B DTCs.

* If two sensors fail, the drive motor generator battery sends a message to the hybrid powertrain control module to reduce the power use limit

to 50 percent and the battery vent fan will default to run.

* If all four sensors fail, the state of charge (SOC) will be considered invalid.

Conditions for Clearing the DTC

DTCs P0A9C, P0A9D, P0A9E, P0AC6, P0AC7, P0AC8, P0ACB, P0ACC, P0ACD, P0AE9, P0AEB, and P0AEA are type B DTCs.

Reference Information

Schematic Reference

Hybrid Cooling Schematics ()

Connector End View Reference

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

Description and Operation

Drive Motor Generator Battery Cooling Description ()

Electrical Information Reference

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

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

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

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

Repairs/Wiring Repairs)

DTC Type Reference

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

(DTC) Type Definitions)

Scan Tool Reference

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

Special Tools

EL-48900 HEV Safety Kit

Circuit/System Verification

1. Verify that DTC P0A80, P0A81 or P0BBD is not set.

瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle),

2. Ignition ON, observe the scan tool BECM hybrid battery temperature parameters. The readings should be between -39 and +95掳C (-38.2 and

+203掳F) with no greater than a 15掳C ( 59掳F) difference between any of the four temperature sensor readings. Refer to Temperature Versus

Resistance ().

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.

Personal Protection Equipment (PPE) and proper procedures must be followed.