2010 Cadillac Truck Escalade RWD V8-6.2L Page 1464
- Damage to the internal drive motor generator battery cooling air outlet duct seals.
* Test the resistance across each temperature sensor 5 V reference and low reference circuits. Refer to Temperature Versus Resistance ().
* If the hybrid batteries are at or above the temperature values for setting these DTCs, allow the hybrid batteries to cool down by letting the
vehicle stand at room temperature, this could take 4 to 8 hours.
* Use the scan tool output control to test the drive motor generator battery vent fan operation.
* Inspect the ground circuit for the drive motor generator battery vent fan relay.
* Inspect the drive motor generator battery vent fan relay connections.
* Refer to Generator Battery Temperature Sensor Location () for the proper locations of the four temperature sensors.
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.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
