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Checking the voltage supply

Symptom: Seat cannot be operated.

Checking the voltage supply



Fault symptom:


• Seat cannot be operated.




Diagnostic procedure:




1. Check that fuse 16 is intact.


2. Unplug the 8-pin connector under the seat and measure the voltage across pin 6 and chassis ground. It should be 12 V. If it is not, check the wiring between pin 6 of the connector and fuse 16.

3. Measure the voltage across pins 6 and 8. It should be 12 V.


4. Measure the voltage across pins 6 and 7 in the connector. It should be about 12 V when a door is open or the ignition switched on, and 0 V when all doors are closed and the ignition is switched off. If different readings are obtained, check the wiring between pin 7 and ICE terminal 32 for continuity/shorting.

5. Remove the relay and check whether 12 V is present across pin 30 and ground and across pin 86 and ground. If it is not, check the wiring between pin 6 of the 8-pin connector and pin 30 or 86 of the relay.


6. Connect a jumper lead across pins 30 and 87 of the relay holder. If the seat can now be operated, change the relay.


7. Check the wiring between pin 87 of the relay and the control module.

8. Turn to page 852-55, "Before control module replacement".