2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1164
the vehicle or safely contain the DC high voltage within the drive motor generator battery assembly. The 3 contactors are a positive high voltage
contactor, negative high voltage contactor, and current limit relay. These contactor/relays close and open in sequence and are controlled by the
drive motor generator battery control module. The drive motor generator battery control module monitors the control circuit voltage and 12 V
reference circuit internal to the control module to determine if the circuit is operating.
Conditions for Running the DTC
* The ignition is ON.
* The 12 V battery voltage is 9-18 V.
* The current limit relay is commanded open.
Conditions for Setting the DTC
This DTC sets when the high voltage current limit relay control circuit voltage and the drive motor generator battery control modules internal
voltage reference are within 2 V of each other when the current limit relay is commanded open.
Action Taken When the DTC Sets
* DTC P0AE7 is a type C DTC.
* After 2 failed high-voltage precharge events, a 20-40 minute precharge wait time is activated by the drive motor generator battery control
module.
Conditions for Clearing the DTC
DTC P0AE7 is a type C DTC.
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics ()
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Drive Motor Battery System 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
Verify that DTC P0AE7 is not set.
If the DTC is set, refer to High Voltage Contactor/Relay Malfunction ().
P0AE9
DTC P0A9C-P0A9E, P0AC6-P0AC8, P0ACB-P0ACD, P0AE9, P0AEA, or P0AEB
Diagnostic Instructions
