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Home >> Chevrolet >> 2013 >> Tahoe LS, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2022 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0442 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0650 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the X1 harness connector at the K20 Engine Control Module.
  2. Ignition ON, the MIL should not illuminate.
    • If the MIL illuminates, test the MIL control circuit terminal X1 68 for a short to ground. If the circuit tests normal, replace the P16 instrument panel cluster.
  3. Connect a 3 A fused jumper wire between the MIL control circuit terminal X1 68 and ground. The MIL should illuminate.
    • If the MIL illuminates, replace the K20 Engine Control Module.
    • 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 normal, test the instrument cluster ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the P16 instrument panel cluster/bulb.
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