Quick Test With Lamp

Diagnostic Procedure.
1. Check the fuses
- Check the following fuses:
^ 23 (control module supply, +30 circuit)
^ 13 (control module supply, +15 circuit)
^ 14 (fuel pump relay supply to fuel pump)

Are the fuses intact?
YES:
^ Continue with point 2.
NO:
^ Change any blown fuses. Then continue with point 2.

2. Check the CHECK ENGINE lamp (MIL)
- Ignition on.
- Check the fuel level.
- Check that the CHECK ENGINE lamp (MIL) lights up and stays on.

Is the CHECK ENGINE lamp on?
YES:
^ The control module is activated.
NO:
^ No control module supply (+15 circuit).
NO:
^ The CHECK ENGINE lamp (MIL) shines weakly or flickers. No control module supply (+30 circuit) or ground connection.
When this fault occurs a buzzing sound can also be heard fro% the main and fuel pump relays at the same time as the tachometer needle moves round the dial.





3. Check the main relay
Since the main relay supplies the injectors and ignition discharge module with power, check its operation as follows:
- Ignition switch in the OFF position.
- Connect the test lamp to pins 10 and 6 of the ignition discharge module's connector.
- Remove fuse 23 for 5 seconds.
- Insert fuse 23.
- Ignition switch in the ON position - check that the test lamp lights up for about 6 seconds and then goes out. Does the test lamp light up for 6 seconds?
YES:
^ The main relay is OK
NO:
^ See Fault diagnosis, "main relay".

4. Run the starter motor when the test lamp has gone out
The test lamp should then light up again.

Test lamp on?
YES
^ The crankshaft position sensor is OK
NO:
^ The control module receives no information from the crankshaft position sensor, see Fault diagnosis, "Crankshaft Position Sensor".





5. Check the fuel pump relay
Since the fuel pump relay supplies the fuel pump with power, check the operation of the fuel pump relay as follows:
- Ignition switch in the OFF position.
- Remove fuse 23 for 5 seconds.
- Insert fuse 23.
- Ignition switch in the ON position - listen for the sound of the fuel pump working. The fuel pump should run for 2 seconds.

Does the fuel pump work?
YES:
^ The fuel pump relay is OK
NO:
^ see Fault diagnosis, fuel pump relay".





6. Final check:
- Check the following:
^ as in point 3, that the power supplied by the main relay reaches the injectors.
^ that the ignition discharge module produces sparks.
^ that fuel pressure is present.

Is power supplied to the injectors?
YES:
^ The power supply is OK
NO:
^ Check the leads up to crimped connection J67.

Does the ignition discharge module produce sparks?
YES:
^ The ignition discharge module is OK
NO:
^ See Fault diagnosis, Ignition".

Is the fuel pressure adequate?
YES:
^ The fuel pump is OK
NO:
^ Continue at the Fuel system and air induction system".