I own a 1998 XJR with 97k miles and have just started messing around with the memory settings for my seats. The steering wheel and mirrors will adjust to the memory settings when I press the buttons/key fab but the the seat itself will not return to the desired position. I did a little searching about the problem but did not find too much information other than there is a black box underneath the seats that may have a broken lead/resistor that I can solder to try and fix the problem. If any of you have had similar problems your input would be very appreciated!

 

I have the same problem. I'll also start looking.

 

mine has always been intermittent since I got the car in 07'

 

I uploaded hundreds of TSB in the large file area.
You need to find 501-35 and 501-51 for diagnosis and repair.

I would suggest replacing ALL the position potentiometers if you do any at all.
It is easier to do them all at once if you disassemble the seat.

When the cars got old enough to be out of factory warranty, customers rarely spent the money to repair the memory function.

The sensors were about $300 EACH and there are 5.
Add labor to that and you can see why people just manually adjust seats.

bob gauff

 

What mine does is this.

It will not take a new memory setting, Just the one that the PO had.

Also if I keep pressing on 1 or 2 it keeps tilting the seat forward until I stop.

 

A new update to this old problem. None of the memory seat positions will move anything, not the steering wheel, mirrors or the seat. I noticed that if I put my finger in the middle of the memory seat position button area (for lack of better terms) it is extremely hot, like will burn my finger if I leave it there. Will be investigating this problem when I get some free time.

 

As I stated above

"I uploaded hundreds of TSB in the large file area."

Stop typing and read all the TSBs in the uploaded section.

Most of the common issues people have are addressed in TSBs.

bob gauff

 

Bob, thanks for uploading all that info. I am new to xjr ownership and my seat memory has no reaction as per the above posts, so am off to read your info, cheers, d

 

good luck with bob's info....i had a similar problem with my drivers seat....but after i did a re-set and than reconnected the battery...i managed to get the seat back to my original custom setting and no i will not even try to re-adjust the seat as i am the only driver.....worth a try...but you may have uncovered something more serious.