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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 508 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0420 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Malfunction Indicator Lamp (MIL) Diagnosis >> Circuit/System Verification

Circuit/System Verification

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NOTE:

Any MIL requesting DTCs that may be set should be diagnosed first.

  1. Ignition ON, command the MIL ON and OFF with a scan tool. The MIL should turn ON and OFF as commanded.
  2. Command the MIL ON and OFF with a scan tool while observing the control circuit status parameters listed below:
    • MIL Ckt Short Gnd Test Status
    • MIL Ckt Open Test Status
    • MIL Ckt Short Volts Test Status

      Each parameter should display OK or Not Run.

  3. Engine running, command the MIL ON and OFF with a scan tool while observing the control circuit status parameters listed below:
    • MIL Ckt Short Gnd Test Status
    • MIL Ckt Open Test Status
    • MIL Ckt Short Volts Test Status

      Each parameter should display OK or Not Run.

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