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Home >> GMC >> 2008 >> Yukon Base, 4.8 C >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Hybrid Engine Control System) >> Diagnostic Information and Procedures >> DTC P1AF4-P1AF7 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
    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. Clear the DTC information.
  3. Turn the ignition OFF for 1 minute.
  4. Turn the ignition ON.
  5. Retest for DTCs P1AF4, P1AF5, P1AF6 and P1AF7.
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