2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1603
Conditions for Setting the DTC
P1AE6
The isolation resistance sensor circuit internal to the drive motor generator battery control module has failed its functional test.
P1AE7
* The drive motor generator battery control module has detected a loss of isolation between the high voltage positive or negative bus to chassis
ground that is less than 200 k ohm.
* This diagnostic may take up to 40 seconds to run after the conditions for running have been met. This DTC will not report the status until the
next key cycle.
Action Taken When the DTC Sets
DTCs P1AE6 and P1AE7 are Type C DTCs.
Conditions for Clearing the DTC
DTCs P1AE6 and P1AE7 are Type C DTCs.
Diagnostic Aids
A single high voltage contactor relay stuck closed can set this DTC.
Reference Information
Schematic Reference
Hybrid Energy Storage 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)
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. Ignition ON, Verify that DTC P1A1F is not set.
瀚慖f the DTC is set, refer to DTC P1A1F or P1A4E (See: P Code Charts/P1A1F).
2. Verify that DTC P1AE6 is not set.
瀚慖f the DTC is set, replace the drive motor generator battery control module.
3. Observe the scan tool 300 V Isolation Test Status parameter. The reading should display Passed.
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
