Service Information

Volt

DTC P06AF

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 P06AF: Torque Management System Performance - Forced Engine Shutdown

The hybrid powertrain control module monitors a state of health message that the ECM transmits to verify the ECM is functioning properly. The hybrid powertrain control module is part of the power inverter module, often referred to as the drive motor power inverter module, and is not serviced separately.

Conditions for Running the DTC

The system voltage is greater than 9.5 V.

Conditions for Setting the DTC

The hybrid powertrain control module does not detect a valid state of health message from the ECM.

Action Taken When the DTC Sets

•	DTC P06AF is a Type A DTC.

•	The hybrid powertrain control module requests the hybrid control module 2 to open the high-voltage contactor relays.

Conditions for Clearing the DTC

DTC P06AF is a Type A DTC.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

Verify that ECM DTC P0606, P0A1D is not set.

⇒	If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

Circuit/System Testing

Vehicle OFF, remove the F103 drive motor generator control module sight shield. Refer to Drive Motor Generator Power Inverter Module Cover Replacement .
Disconnect the T6 power inverter module X1 connector and the ECM X1 connector.
Test for less than 1 Ω between the serial data circuits listed below:

•	T6 power inverter module X1 connector terminal 10 and K20 ECM X1 connector terminal 43

•	T6 power inverter module X1 connector terminal 11 and K20 ECM X1 connector terminal 29

⇒	If greater than the specified range, test the serial data circuit for an open/high resistance condition. If the circuit tests normal, replace the K20 ECM.

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

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM or Drive Motor Generator Power Inverter Module, also called the power inverter module, replacement, programming, and set-up.