The Oil Pressure Warning Lamp Does Not Turn Off

The Oil Pressure Warning Lamp Does Not Turn Off

Description

The oil pressure warning lamp remains illuminated while the engine is running (normal oil pressure).

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Meter: Wiring Diagram] Meter.

1. CHECK OIL PRESSURE WARNING LAMP

Perform IPDM E/R auto active test. Refer to [Diagnosis System (IPDM E/R): Diagnosis Description] Diagnosis System (IPDM E/R) Diagnosis Description.

Is oil pressure warning lamp illuminated?
YES
GO TO 2
NO
Replace combination meter. Refer to [Combination Meter: Removal and Installation] Service and Repair.

2. CHECK IPDM E/R OUTPUT VOLTAGE

1 Turn ignition switch OFF.





2 Disconnect the oil pressure switch connector.
3 Turn ignition switch ON.
4 Check voltage between the oil pressure switch harness connector E208 (VQ40DE) or F4 (QR25DE) terminal 1 and ground.






Is the inspection result normal?
YES
GO TO 3
NO
GO TO 4

3. CHECK OIL PRESSURE SWITCH

Perform a unit check for the oil pressure switch. Refer to [Oil Pressure Switch Signal Circuit Check] Oil Pressure Switch Signal Circuit Check.

Is the inspection result normal?
YES
Replace IPDM E/R. Refer to [IPDM E/R: Removal and Installation of IPDM E/R] Service and Repair.
NO
Replace oil pressure switch.

4. CHECK OIL PRESSURE SWITCH SIGNAL CIRCUIT

Check the oil pressure switch signal circuit. Refer to [Oil Pressure Switch Signal Circuit Check] Oil Pressure Switch Signal Circuit Check.

Is the inspection result normal?
YES
Replace IPDM E/R. Refer to [IPDM E/R: Removal and Installation of IPDM E/R] Service and Repair.
NO
Repair harness or connector.