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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1220 (Hybrid Engine Control System) >> Diagnostic Information and Procedures >> DTC P1AF4-P1AF7 >> Circuit/System Testing
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Circuit/System Testing

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.
  1. Inspect for DTC P1AE7.
    • If the DTC has set, a loss of isolation condition within the hybrid battery has caused this DTC to set. Refer to DTC P1AE6 or P1AE7 .
  2. Ignition ON, retest for DTCs P1AF4, P1AF5, P1AF6 and P1AF7.
    • If the DTC resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.
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