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Home >> GMC >> 2011 >> Yukon Base, 5.3 3 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls And Fuel - Hybrid (LZ1) - DTC P0351 Through DTC P3449 And Troubleshooting) >> Diagnostic Information and Procedures >> Malfunction Indicator Lamp (MIL) Diagnosis >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON, command the MIL ON and OFF with a scan tool. The MIL should turn ON and OFF.
  2. Engine idling, command the MIL ON and OFF with a scan tool while observing the following control circuit status parameters:
    • MIL Circuit Short to Gnd Test Status
    • MIL Circuit Open Test Status
    • MIL Circuit Short to Voltage Test Status

      Each parameter should toggle between OK and Not Run or Not Run and OK.

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