2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1156
The hybrid battery temperature sensor is in normal operating range, but is 15锟斤拷C (59锟斤拷F) different from the other 3 sensors.
P0A9D, P0AC7, P0ACC, and P0AEA
The hybrid battery temperature is greater than 95锟斤拷C (203锟斤拷F) and one other temperature sensor is less than 70锟斤拷C (158锟斤拷F).
P0A9E, P0AC8, P0ACD, and P0AEB
The hybrid battery temperature is less than -40锟斤拷C (-40锟斤拷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.
锟斤拷If 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锟斤拷C (-38.2 and
+203锟斤拷F) with no greater than a 15锟斤拷C ( 59锟斤拷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.
