After reading through dozens of posts I decided to send my module in to be rebuilt. I got the module off the car fine, without losing any brake fluid. I have read the car is fine to drive, just without ABS/Trac. So after disconnecting the module and trying to drive the car all hell broke loose. The Check Engine Light is on, the display has both amber and red lights on and displays ASC Not Available and LOW BRAKE FLUID. The car runs fine, but the transmission is locked in 2nd gear and the changes from park to reverse to drive are very abrupt, like it's in failsafe mode. Oh, and the speedometer doesn't work. Other than that, the car is fine and the physical brake system works as it did before.

I'm waiting on the module to be shipped back, but I would still like to drive the car. I just didn't think it would freak out. I'm open to suggestions as I have read others have driven their car without the module to no ill effect. Any ideas?

 

The car is a 2002 XJR by the way.

 

i'd suggest you just let is sit till you get the module back...i just replaced my module and it all works fine..i ordered one off ebay so i didn't have to wait to get mine back...

 

Well I guess it can wait. I was planning a trip with the car for this weekend, but the company called and said they couldn't get it back to me until next week. If it's worth anything, I erased the CEL light and these codes came right back up. P1720, P1000, and P1637.

Pdog, how did you get one off eBay, I thought maybe the module had to match the exact car? Or can you buy any module for a Jag 98-03?

 

On Jaguars the TCM (as well as several other functions) uses the wheel sensors for various vehicle speed inputs. P1720 is the TCM output sensor, essentially, it is lost with no wheel signal coming in. Everything will function normally with just the ABS signal side lost, but not the whole module removed.

You're better parking it and not driving it like this in limp mode.

 

Thanks for posting this. I've been troubleshooting ABS / TRAC issues for the last 2 weeks. I've seen all the posts you mentioned. I'm planning on doing the module repair myself, but it's nice to know that I can plan on the car being out of commission for the day or so it takes to repair and reseal the module.

 

Ah that makes sense. I hope others take note of this then. Probably not going to be cruising in the car while the module is out. Alas, even the website of the rebuild service mentions that "You can drive normally without your module, just without ABS"... Wrong! Ha ha.

 

hey thinkpad master - there are three types for the x308 XJRs...
98-99 = JLM020556 (w/traction control)
and
00-03 = JLM021323 (w/traction control)
and
00-03 = JLM020555 (w/o traction control)

check for these on ebay or jagbits and you should be fine...

 

I removed the ABS Module from my 2001 XKR this weekend and had a similar experience.
Low brake fluid warning light, check engine light, red brake light amber and red warning lights. jerky and rough shifting. and that was just in the driveway. I did not attempt to drive it anywhere but rather let it rest until the module comes back.
Several years ago I took the ABS module out of my 1999 XK8 and was able to drive it with only the ABS warning light on. My 2001 XKR is a totally different response. I hope this may help others.

 

I have the same issues with my 2001 XJR which I bought as a problem car. The previous owner had given up trying to get the ABS issue sorted. By the time I got the car it was displaying:

ABS Traction unavailable

Incorrect part fitted

Brake fluid low

No Speedometer

Transmission engages with a bang

Will not shift out of 2nd

I discovered that the previous owner had tried to fit the incorrect ABS module instead of the JLM21323.

I have ordered a used module and cannot wait to see what happens.

Guys, Is it safe to assume that the supercharged cars fitted with the 722.6 transmission will not be able to be driven with the ABS module unplugged without experiencing the above mentioned issues?

Its seems like the cars fitted with the ZF tranny can be driven normally sans the ABS computer.

Any opinions?

 

The ABS module is at the 'other-end' of the CAN bus (and has the terminating resistor). The CAN bus is NOT HAPPY when one of the modules is missing (no communication).

The W5A580 probably needs the speed input more than the ZF gearbox. The INSTPK is at the OTHER END of the CAN bus and the speed info is on the bus for all modules that want/need that info.

I have not seen a 2000-2003 XJ sedan in the U.S. that did not have traction control so I have always used JLM21323 for all these cars.

The 1998-1999 cars can go either way. (5 pipe or 6 pipe)

The number on the module IS NOT the actual Jaguar part number!!!!

bob gauff

 

My 1998 XJ8 will not drive without the ABS module hooked up - it will not let you move it out of park.
I just sent out my ABS module to be re-soldered, now that I have refitted it - I get the "incorrect part fitted" message. It looks like it is my original part that has been returned so I am assuming that it needs to be reintroduced to the ECU. It does not seem that the cheaper scanners can do this so I will have to take it to a specialist.

 

I guess you didn't disconnect the battery? a little knowledge is a dangerous thing - I can only suggest confirming that it is in fact the car's original module.

You do this by checking the VCATS module list stuck to the inside of the wheel well in the trunk, remove the stuff around it to locate. Looking at the list there will be an ABS module part number and it's programme code - you can compare the 2 numbers, on the VCATS and the module. If it's correct, perform a 'hard reset' (do a search on this term) - if not contact the refurb specialist and ask for yours back.

 

Thanks Sean for the reply.
You are right, I didn't disconnect the battery first.
The VCATS seems to list everything but the ABS module.
It does look like the module that I sent out for repair and it still has a bit of the sticker that I put on it with my name and address on it.
I tried a hard reset it still says "incorrect part fitted". I can still drive it, but the speedo does not work and the dash brake light stays on.
I'm taking it to the local independent Jag repair shop on Tuesday - mechanic said it'll be about $80, not a big deal if that's all it is.

 

Good news: car is fixed - no ABS/TRAC fail for the first time in at least a year.
Bad news: I ended up having the Jag shop replace my ABS module with a used one, which plugged right in and worked.($400 + labor)

FWIW; Mechanic said battery disconnected or not makes no difference, and my years model is not programmable.

The module repair service probably messed up opening / soldering my module.

 

Any rec on shops that do good module repair work? My 2001 XJ is in need.

Thanks,

 

The ABS module is not programmable but if the INST PK displays 'WRONG PART FITTED' then it would need to be CONFIGURED to the car.

This is done with WDS, IDS etc. by going to the Vehicle Configuration Tab and follow the procedure to configure New ABS Module.

bob gauff

 

Thanks Bob,
I guess the mechanic did not know how to configure the unit?
So before I send my original "repaired" module back to the module repair shop, do you think it is probably okay and not a mistake on their part?
The mechanic seemed to think the units were plug and play, and if it was re-soldered properly it could just be plugged back in.

After dropping $400 on a used module, I'd like to resell my "repaired" one but I'd like to know if it is usable first.

 

NORMALLY if the original module is repaired and refitted it will NOT require configuration. If a NEW module is fitted it WILL require configuration.

SOMETIMES a used replacement module needs to be configured to the car.

Electronics can be strange!!!!!!!

bob gauff