Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.6L (LGH) - DTC P0016 Through DTC P11DC >> Diagnostic Information and Procedures >> DTC P0650 >> Testing >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X1 harness connector at the K20 ECM.
  2. Ignition ON, the MIL should not illuminate.
    • If the MIL is illuminated, test the MIL control circuit terminal 17-X1 for a short to ground. If the circuit tests normal, replace the IPC.
  3. Connect a 3 A fused jumper wire between the MIL control circuit terminal 17-X1 and ground. The MIL should illuminate.
    • If the MIL illuminates, replace the ECM.
    • If the MIL does not illuminate, test the MIL control circuit for a short to voltage or an open/high resistance. If the MIL control circuit tests OK, test the cluster ignition circuit terminal 19 for a short to ground or open/high resistance. If the circuits test normal, replace the IPC/bulb.
scientia non olet · About Mike's Workshop Manuals