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Home >> Chevrolet >> 2008 >> Tahoe Hybrid, RWD >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Converters and Controllers >> Hybrid Engine Control System >> Diagnostic Information and Procedures >> DTC P06AF >> Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, inspect for ECM DTC P0606, ECM DTC P0A1D, or any U-code communication DTCs.
  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.
    • 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.
  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.
  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.
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