P0643

DTC P0642, P0643, P0652, or P0653

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor
DTC P0642
- 5 Volt Reference 1 Circuit Low Voltage

DTC P0643
- 5 Volt Reference 1 Circuit High Voltage

DTC P0652
- 5 Volt Reference 2 Circuit Low Voltage

DTC P0653
- 5 Volt Reference 2 Circuit High Voltage

Circuit/System Description

The drive motor generator power inverter module contains two motor control modules and a hybrid powertrain control module. Each motor control module utilizes a 5 V reference power supply for internal circuit needs. This fault is handled inside the drive motor generator power inverter module and no external circuits are involved. The motor control modules and the hybrid powertrain control module are part the drive motor power inverter module and are not serviced separately.

Conditions for Running the DTC

* The ignition is ON.
* The system voltage is 8-18 V.

Conditions for Setting the DTC

The control module has detected an internal malfunction.

Action Taken When the DTC Sets

* DTCs P0642, P0643, P0652 and P0653 are Type A DTCs.
* The drive motor generator power inverter module commands the battery energy control module to open the high voltage contactor relays.

Conditions for Clearing the DTC

DTCs P0642, P0643, P0652 and P0653 are Type A DTCs.

Reference Information
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

If the DTC is set, program the T6 drive motor generator power inverter module. If the DTC resets, replace the T6 drive motor generator power inverter module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Control Module References for Drive Motor Generator Power Inverter Module replacement, setup, and programming.