Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: DTC P1AE7 must test and pass before performing this diagnostic procedure.

Inspect for DTC P1AE7.
- If the DTC is set, the loss of isolation has occurred within the drive motor generator battery. Diagnose this concern first. Refer to DTC P1AE6 or P1AE7 .
Inspect for DTCs P0A78, P0A79, P0BFD, P0BFE, P0C01, or P0C04.
- If any of the DTCs are set, the loss of isolation has occurred within the 3-phase components. Diagnose this concern first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Clear the DTC information.
Turn the ignition OFF for 1 minute.
Turn the ignition ON.
Operate the vehicle within the Conditions for Running the DTC.
Retest for DTCs P1AF0 and P1AF2.