Hello-


A few weeks ago my 2004 XK8 went into the shop to see what can be done about the "cruise not available" warning. It's been determined that the source of the problem is the adaptive cruise control module (it's got adaptive cruise control not the "normal" cruise control).


The cost of a new unit from Jaguar is $2200- exactly the same as the adaptive cruise control option when the car was new. My mechanic mentioned that it's possible to rebuild the unit, but warned that there are guys who will fiddle around with it, charge $400 & then tell you it can't be rebuilt.


Can anyone recommend a reliable shop that can rebuild an adaptive cruise control module?


Thanks.

 

Are you triple sure you have eliminated the much more common brake switch issue? "cruise not available" "Check rear bulbs", or something to that effect...

 

^^ Agreed - check your brake pedal switch assembly before you spend crazy money on your adaptive cruise control module. What proof do you have that the module is indeed at fault? Are there any associated OBDII codes?

 

I have this issue on my 2004 right now. Have not looked into it yet but and was planning to start with the brake switch.

Will be watching this thread with interest.

 

Rothwell,

If your brake pedal switch assembly is the original one, it is highly likely that it is indeed your problem. I have an EE friend who has replaced the microswitches and re-soldered all the connections on the two assemblies I own, and they continue to work perfectly. One is installed in the car and the other sits on my garage shelf as a spare....

 

I did replace the switch once about 30K miles ago.

I still have my old switch and was planning on taking a shot at repairing it if I can find the info about replacement switches.

 

These microswitches have previously been reported on this forum as being compatible with our brake pedal switch assemblies:

- DigiKing.com . . . . . . part no. 480-3630-ND

- Honeywell Switch . . . . . . part no. ZD30S60C02-Z

 

Had a Jag mechanic diagnose- would hope he'd eliminate the easier causes before jumping to the expensive one. But I'll ask...


Alternatively, is it possible to convert from adaptive to "regular" cruise control? I don't really care about the adaptive part, but would like cruise control (w/o warning notice & light).

 

Red,

My 2003 XKR Coupe came with the Adaptive Cruise Control....When I first got it I thought it was a big deal, that until I got in the Houston traffic...I got a little close to the Car in front of me and the darn Brakes went on automatically and scared the "Stuff" out of me!! I immediately turned that wonderful little sensor "OFF" forever! Then while driving down the Freeway, I decided to pass the Car in front of me...as I sped-up to Pass the darn ACC puts on the Brakes, as I had violated it's 3rd Distance Zone! I was determined to get the better of the machine and continued to use it but only on the Freeway to San Antonio or Dallas, always afraid it was going to throw on the Brakes and bust me up against the Windshield! Then one Day, the Darn thing just quit working all together! The Jaguar Guy wanted $2,850.00 to replace the little Radar Box behind the Grill.......Said those things get corroded and the little gizmo that goes back and forth like a Radar Tower was corroded in place and wouldn't move anymore! That's when I told him, "Let just forget about it!" I've forgotten now what had to be done to go back to regular Cruise-Control... but I never did.......until I got my 2005 XKR, (WITHOUT) Adaptive Cruse Control..........I like the Cruise Control that I can Control!

That's my story and I'm going to stick with it!

Billy Clyde in Houston

 

It can be done. I think all you need is the jaguar dealer software to reconfigure the car and maybe disconnect the module.

I can’t find it off hand but there is a thread or two about doing this. Maybe it was in the XJ section.

 

Still no luck....


One mechanic suggested same as ccfulton- delete cruise control from software, but it hasn't been done yet.


On same theory, why can't someone just program the software to think it's communicating with sensors & that the closest car is 1/4 mile ahead (i.e., cruise control will work just like non-adaptive).

 

You'd have to reprogram the module which is suspected faulty and vitally there's a market for one or two cars so it's going to be horrifically expensive - perhaps more than just buying another car!

 

Unfortunately, I have the same problem with my 2003 XKR with adaptive cruise. The "cruise not available" message and amber warning light are constantly present on the dash when I go over 5 mph. Since I have had brake switch issues in the past I figured it was worth a shot to try to rebuild the switch so I soldered on some new microswitches earlier this year. It never fixed the problem and I just lived with it while resolving other issues. Today I installed a brand new brake switch in order to fully eliminate that possibility and the cruise is still not working! So at this point, after scouring the forum, I think there is an issue with the adaptive cruise control module. Have you guys successfully been able to rebuild the module? I am hoping that it is possible as the cost is insane, if one is lucky enough to even find one of them.

 

Hi same problem, only one company that repairs these in Britain. B B Reman on South coast I'm sure it's called

 

Hi - I know this is an old thread, but hopefully I will get a reply. I just bought a 2003 XKR - nice condition but the adaptive cruise control is not working ......just like cs81srq's problem. I have the yellow message "Cruise Control not available" on starting and continuous when driving. i knoew this was an issue when i bought the car, but would like to fix it if the cost is not horrendous. I have located the cruise unit under the bumper but i have not removed it. I can see that someone has been inside te unit at some time as it has duct tape and zip ties on it - so very much suspecting my problem is the unit. The part no on the unit is 2W93-9AA12-88 [las two digits could be BB].

I like the idea of converting the adaptive cruise to regulr cruise but reading the threads, this sounds like it may take some programming and i have no experience or equiopment to do that. Not that i am not willing to learn! I think I may have located a used module - but at around $750. I am not averse to spending that, but there's always the risk that it doesn't work or will only work for a month or so. Anyway - given that this thread is a few years old, i would be very intrested to hear how anyone has solved the issue and what route they took.

Many thanks in advance!

 

Info for you but probably NLA.

 

Hi Motorcarman:
Thank you for the information. I don't hear any sounds from my unit so I am assuming it is dead. I have located a used unit at a resonable cost so was thinking of just swapping it out. However, I see from the instructions you sent that it may need a WDS to reconfigure the unit. Do you think this will be the case?

Thanks in advance for any assistance!

 

It's been a looong time since I dealt with the modules and configuring them.

No idea if the replacement will work or needs config?