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2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1164

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

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