Lost seat memory

Q I have a 1995 Daimler Six (a Jaguar X300 with expensive extras) that has a memory function for seat, seat rake, steering wheel, etc. set by buttons in the door pocket with three different settings for different drivers.

My problem is that the settings are not being memorised and so, on unlocking the car, seat steering wheel, rake positions are all over the place. I suspect the seat control module is faulty. My question therefore is what do you know about such things and is it possible to repair a faulty module.

Ronnie Mapes

A This is a problem which is not uncommon and there is a 15page service technical bulletin on the problem and its diagnosis. The bulletin points out that each part of the system should be carefully looked at for any signs of movement – if part of a system moves even slightly then the memory system is trying to recall the stored settings. If this is the case the memory system is working, but not all positions are recalling correctly.

If there is no memory recall then the following points should be checked:

 Is the driver door switch pack faulty? Look for buttons sticking, water ingress, do the memory recall buttons appear to work OK.  Are the fuses for the memory system

OK?

 Has memory been programmed to a

switch-pack button?

 Is the driver door module working

correctly?

 Are the connections and harnesses to

the driver door module OK?

 V8 XJ vehicles only: Is the driver side rear door module working correctly/ are the connections and harnesses OK?  Is the Body Processor Module working.

If all the above criteria is covered then it must be presumed that the driver’s seat module has failed.

There are then two options, either sourcing a replacement unit – these are not coded to the vehicle – just plug and play. Or having a repair carried out – bba-reman.com do list the Jaguar seat module as one they can repair and they should be able to carry this out for you.