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Home >> GMC >> 2017 >> Terrain SL, Gas >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC P0520: Engine Oil Pressure Switch Circuit Malfunction (without LEA engine) >> Component Testing

Component Testing

Static Test

  1. Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch.
  2. Test for infinite resistance between the signal terminal A and the low reference terminal B with the switch in the open position.
    • If not the specified value, replace the B37 Engine Oil Pressure Switch.
  3. Test for less than 5 Ω between the signal terminal A and the low reference terminal B with the switch in the closed position.
    • If greater than the specified range, replace the B37 Engine Oil Pressure Switch.