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Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> Driver Information, Main Instrument Unit And SID >> Fault diagnosis, symptoms >> Engine Oil Pressure Indicator Malfunction >> Circuit/System Testing >> With LLU

With LLU

  1. Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch.
  2. Ignition ON, verify the scan tool ECM - Engine Oil Pressure Switch parameter is OK.
  3. 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.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool ECM - Engine Oil Pressure Switch is Low.
  5. 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.
  6. Command the All Indicators test ON and OFF with the scan tool. The engine oil pressure indicator should turn ON and OFF when changing between the commanded states.
  7. If the engine oil pressure indicator always stays on or always off, replace the P16 Instrument Cluster.
  8. If all circuits test normal, test or replace the B37 Engine Oil Pressure Switch.
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