Diagnostic Instructions
DTC Descriptor
DTC P06AF: Torque Management System - Forced Engine Shutdown
Circuit/System Description
This diagnostic applies to communication integrity conditions between the engine control module (ECM) and the hybrid powertrain control module (HPCM). The HPCM monitors a state of health message that the ECM transmits to verify the ECM is functioning properly.
Conditions for Running the DTC
Ignition voltage is 8-18 volts
Conditions for Setting the DTC
The HPCM 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 HPCM commands the battery energy control module (BECM) 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
- Clear the DTC information.
- Turn the ignition OFF for 1 minute.
- Turn the ignition ON.
- Retest for DTC P06AF, ECM DTC P0606, or any communication DTCs.
Circuit/System Testing
- Ignition ON, inspect for ECM DTC P0606, ECM DTC P0A1D, or any U-code communication DTCs.
- Ignition OFF, disconnect the ECM connector X3 and the PIM connector X1.
- Test for less than 1 ohm resistance on the GMLAN serial data circuits between the ECM and the PIM.
⇒ | If greater than the specified range, repair the GMLAN serial data circuit for an open/high resistance condition. |
⇒ | If within the specified range, inspect the ECM and PIM connectors for proper terminal contact. Repair as necessary. |
- Ensure the ECM contains the latest software version. Program as necessary.
- Ignition ON, inspect for ECM DTC P0606 or any U-code communication DTCs.
⇒ | If only P06AF has reset, replace the ECM and continue with diagnosis. |
- Ensure the PIM contains the latest software version. Program as necessary.
- Ignition ON, inspect for ECM DTC P0606 or any U-code communication DTCs.
⇒ | If only P06AF has reset, replace the PIM. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM or PIM replacement, setup, and programming.