Tire Pressure Module: Service and Repair

Removing and installing RDK control unit

Notes:
- The RDK control unit is in the footwell on the driver's side, above the base of the storage compartment. On right-hand drive cars, the RDK control unit is attached to the right side panel in the driver's footwell.
- When the RDK control unit is removed or installed, the ignition must be switched off. Remove the storage compartment (4 retaining nuts).
- From software status R 02 on, the RDK control unit has an event memory for tire pressure losses. This was introduced during the 1991 model year/amended part number index for control unit. Any tire pressure losses on the last 8 occasions that the car was driven can be read out with the 9288 system tester.


Removing




Unscrew and remove the screws holding the RDK control unit. Remove control unit with plug from holder, release the plug by applying pressure to the retaining clip and pull it off the control unit.



Installing

Proceed in the opposite order of work. Make sure that the plug locates correctly in the control unit. After installing, perform the quick RDK test.

After this, read out the fault memory with the 9228 system tester (menu 1). Erase any faults stored in the memory.

Note: When attaching the control unit, first push it into the clips at the rear. Make sure that no wiring is trapped between the control unit and the holder.