2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1607
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 (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Clear the DTC information.
2. Ignition OFF for 1 minute.
3. Ignition ON.
4. Retest for DTC P06AF, ECM DTC P0606, or any communication DTCs.
Circuit/System Testing
1. Ignition ON, inspect for ECM DTC P0606, ECM DTC P0A1D, or any U-code communication DTCs.
瀚慖f the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Ignition OFF, disconnect the ECM connector X3 and the PIM connector X1.
3. Test for less than 1 ohm resistance on the GMLAN serial data circuits between the ECM and the PIM.
瀚慖f greater than the specified range, repair the GMLAN serial data circuit for an open/high resistance condition.
瀚慖f within the specified range, inspect the ECM and PIM connectors for proper terminal contact. Repair as necessary.
4. Ensure the ECM contains the latest software version. Program as necessary.
5. Ignition ON, inspect for ECM DTC P0606 or any U-code communication DTCs.
瀚慖f the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
瀚慖f only P06AF has reset, replace the ECM and continue with diagnosis.
6. Ensure the PIM contains the latest software version. Program as necessary.
7. Ignition ON, inspect for ECM DTC P0606 or any U-code communication DTCs.
瀚慖f the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
瀚慖f only P06AF has reset, replace the PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or PIM replacement, setup, and programming.
P06A6
DTC P0641 or P06A6
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
