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Fault diagnosis, oil pressure warning lamp(MIU 2)

Fault diagnosis, oil pressure warning lamp (MIU 2)

Fault symptoms

The lamp does not light up when the ignition switch is turned to the Drive position. The lamp does not go out when the engine has started.

Diagnostic procedure



1. Raise the car and check the warning lamp circuit by grounding the pressure sensor's connecting pins while the engine is running.

First make sure that the central warning lamp is not alight.

The oil pressure warning lamp and the central warning lamp should light up.

If both lamps light up, the fault is in the pressure sensor which will have to be changed.

If only the central warning lamp lights up, the oil pressure warning lamp bulb is faulty and must be changed.

If none of the lamps light up, continue with point 2.

2. Check that the wiring between the main instrument display panel and the pressure sensor (should be connected) is OK by connecting a BOB to the 56-pin connector behind the main instrument display panel (which should not be connected).



3. Check for an open circuit by taking a reading across pin 17 on the BOB and a good ground.

4. Switch on the ignition and ground pin 17 on the BOB.


If the lamps do not light up, the fault is in the main instrument display panel's processor card. Continue on page

If the lamps light up, the fault is in the wiring or the pressure sensor. Investigate and take appropriate action.