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Home >> Pontiac >> 2006 >> Solstice Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC P0520 >> Circuit/System Testing

Circuit/System Testing

IMPORTANT: Do not turn the key to the crank position or engage the starter at any time during diagnosis.
  1. Turn the ignition ON, with the engine OFF.
  2. With the ignition ON, install a scan tool and observe the Engine Oil Pressure Switch parameter in the IPC ECM Data List.
    • If the Engine Oil Pressure Switch parameter displays OK, disconnect the engine oil pressure switch, connect a 3-amp fused jumper wire between the signal circuit of the EOP switch and a good ground.
  3. With the scan tool installed observe the Engine Oil pressure Switch parameter in the IPC ECM Data List.
    • If the Engine Oil Pressure Switch parameter displays Low, check for a poor connection at the harness connector of the EOP switch.
    • If the harness connector is normal, replace the EOP switch.
    • If the Engine Oil Pressure Switch parameter displays OK, check the signal circuit of the EOP switch for an open, for a high resistance or for a short to voltage.
    • If the signal circuit tests normal, check for a poor connection at the harness connector of the ECM.
    • If the harness connector is normal, replace the ECM.
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