Diagnostic Instructions
Circuit/System Description
The engine oil pressure (EOP) switch is a normally closed switch that opens with the proper oil pressure. With the ignition switch turned ON and the engine not running, the engine control module (ECM) should detect a low signal voltage input. With the
engine running, the pressure switch opens, and the ECM should detect a high signal voltage input.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Scan Tool Data List
Circuit/System Testing
- Ignition ON, engine ON, verify the scan tool Engine Oil Pressure Switch parameter is Low.
⇒ | If not Low, replace the instrument panel cluster (IPC). |
- Ignition OFF, disconnect the harness connector at the EOP switch.
- 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 ECM. |
- If all circuits test normal, test or replace the EOP sensor.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.