2001 XKR adaptive cruise control failure
Discussion
I'd really appreciate any help and advice regarding the failure of the adaptive cruise control on my 2001 XKR!
Despite the age of the car, the adaptive cruise has always worked well. Recently, a warning light appeared on the dash to announce the failure of the system.
When the car was taken to the main dealer in Ipswich, their computer was unable to diagnose the problem with certainty, but they felt it was probably located in one of two boxes of electronics which operate the cruise. Replacing both (for over £2,000) was the suggested solution, although it wasn't clear if this plan would actually work.
Rather frustratingly, it wasn't possible to cancel the flashing warning message on the dash.
Does anyone have experience of problems with Jaguar adaptive cruise control on vehicles of this age? If so, any pointers as to how to fix the system? I realise that the remedy suggested by the main dealer might be the only way forward on this...
Many thanks!
Despite the age of the car, the adaptive cruise has always worked well. Recently, a warning light appeared on the dash to announce the failure of the system.
When the car was taken to the main dealer in Ipswich, their computer was unable to diagnose the problem with certainty, but they felt it was probably located in one of two boxes of electronics which operate the cruise. Replacing both (for over £2,000) was the suggested solution, although it wasn't clear if this plan would actually work.
Rather frustratingly, it wasn't possible to cancel the flashing warning message on the dash.
Does anyone have experience of problems with Jaguar adaptive cruise control on vehicles of this age? If so, any pointers as to how to fix the system? I realise that the remedy suggested by the main dealer might be the only way forward on this...
Many thanks!
Does your alarm sounder work. I had similar problems when at a jag dealer. Jaguar sent new cruise control unit. They sent an engineer. He couldn't fix it. Eventually traced it to a blown fuse. The Adaptive cruise and alarm sounder share the same fuse. Alarm sounder was faulty blowing fuse, stopping cruise working.
Let me know.
Let me know.
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Many thanks for the advice.
I haven't tried to make the alarm sound, so that's an obvious next step. Let's hope it's not working so that I then get a bit closer to locating the fault.
Electronic wizardry is all well and good until it fails! The fact that the main dealer was baffled didn't encourage me.
A second opinion from a good independent might be a next step before I throw lots of money at the problem.
I haven't tried to make the alarm sound, so that's an obvious next step. Let's hope it's not working so that I then get a bit closer to locating the fault.
Electronic wizardry is all well and good until it fails! The fact that the main dealer was baffled didn't encourage me.
A second opinion from a good independent might be a next step before I throw lots of money at the problem.
Also worth checking, any rear light error messages, possible brake switch and or lamps won't help.
Wheel sensors which should flag up can also be an issue.
The looms between the brake booster module and servo probably worthy of inspection.
A CAN circuit failure will trigger other warning messages, ABS fault, Trac not available. (probably)
The indies are a good shout, however if it's wiring, it's still many hours belling out the loom, and even then is may be a partial break that doesn't show all the time..
Is the cruise not available message permanent?
All the best, I'm almost through the pain! It's taken a month of spare time, admittedly not lots, to sort mine.
No new parts required thus far though...
Wheel sensors which should flag up can also be an issue.
The looms between the brake booster module and servo probably worthy of inspection.
A CAN circuit failure will trigger other warning messages, ABS fault, Trac not available. (probably)
The indies are a good shout, however if it's wiring, it's still many hours belling out the loom, and even then is may be a partial break that doesn't show all the time..
Is the cruise not available message permanent?
All the best, I'm almost through the pain! It's taken a month of spare time, admittedly not lots, to sort mine.
No new parts required thus far though...
A hectic week at work, so little time to get into the garage in the evening!
However: the alarm works and the car is showing no other error codes (eg blown bulbs/other system failures). Of note is the fact that the voltage across the battery terminals is a bit low (it's an old battery and the car isn't used much) so I'll put my CTEK charger onto it and see if this changes anything.
I haven't had chance to check the fuse box containing the ACC system fuse yet, so this is another job to do at the weekend.
Let's hope it's not a wiring loom problem.
However: the alarm works and the car is showing no other error codes (eg blown bulbs/other system failures). Of note is the fact that the voltage across the battery terminals is a bit low (it's an old battery and the car isn't used much) so I'll put my CTEK charger onto it and see if this changes anything.
I haven't had chance to check the fuse box containing the ACC system fuse yet, so this is another job to do at the weekend.
Let's hope it's not a wiring loom problem.
The problem car I had emitted the following.
WDS (jag diagnostic ) wouldn't communicate with the ACC module. Sp that's what made the jag engineer suspect the module was at fault.
I think the sounder fuse wasn't listed or something silly.
I believe you can buy a fuse tester that saves you taking them all out.
I would be inclined to check ALL fuses if possible even the ones not shown above.
Time consuming I know but you might be lucky.
WDS (jag diagnostic ) wouldn't communicate with the ACC module. Sp that's what made the jag engineer suspect the module was at fault.
I think the sounder fuse wasn't listed or something silly.
I believe you can buy a fuse tester that saves you taking them all out.
I would be inclined to check ALL fuses if possible even the ones not shown above.
Time consuming I know but you might be lucky.
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