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Home >> Hummer >> 2007 >> H3 Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gages >> Diagnostic Information and Procedures >> Engine Oil Pressure Indicator Always On >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the EOP switch.
  2. Ignition ON, verify the scan tool Engine Oil Pressure Switch parameter is OK.
    • If not OK, test the signal circuit of the EOP switch for a short to ground. If the circuit tests normal replace the PCM.
  3. Ignition ON, perform the lamp test with the scan tool to turn the engine oil pressure indicator OFF.
    • If the engine oil pressure indicator does not turn OFF, replace the IPC.
  4. If all circuits test normal, test or replace the EOP switch.
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