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Home >> Chevrolet >> 2012 >> Orlando LS, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC P0520-P0523 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch.
  2. Ignition ON, verify the scan tool Engine Oil Pressure Switch parameter is OK.
    • If not the specified value, test for the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.
  3. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Engine Oil Pressure Switch parameter is Low.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  4. If all circuits test normal, test or replace the B37 Engine Oil Pressure Switch.
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