Service Information

Volt

DTC P0A1B or P0A1C

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0A1B: Drive Motor 1 Control Module Performance

DTC P0A1C: Drive Motor 2 Control Module Performance

This is a fault detection of the drive motor generator power inverter module's internal motor control modules. This fault is handled inside the drive motor generator power inverter module, no external circuits are involved. The motor control modules are part of the drive motor generator 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 P0A1B and P0A1C 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 P0A1B and P0A1C are Type A DTCs.

Reference Information

DTC Type Reference

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 after completing the diagnostic procedure.

Control Module References for Drive Motor Generator Power Inverter Module replacement, set-up and programming.