I own a 2001 S-series model, 6cyl 3.0L petrol
After 15+ years of reliable running, my Control Module just blew out completely
To the point that my car will no longer start
It has now been off the road for the better part of 6 months
I need a wreck that I cannibailse for that part
Can anyone point me in the right direction?

I have found a BCM from an 8cyl for a bargain price, but have no clue if it's compatible with my 6cyl.

 

Which "control" module?
The car is full of them?
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Body Control Module.

I wrote CM instead of BCM because of the acronym list. My bad

I have found a BCM from an 8cyl for a bargain price, but have no clue if it's compatible with my 6cyl.

The car started playing up by occassionally trying to accelerate and there was nothing I could do to stop it other than jam my foot on the brake until I stopped and then turn the engine off. It was quite disconcerting. Other issues before complete failure were the doors locking and unlocking repeatedly of their own accord, the oil light and brake light displaying when nothing was wrong, my headlights turning off without warning .. oh and the wipers had mind of their own.. it was a mess, the old girl seemed to be possessed.

 

By BCM I wonder if you mean the front or rear.

They are not involved in any such acceleration, however.

Commonly that would be an accelerator pedal jammed down (e.g. foot, e.g. carpets, ...).

You can read the pedal position and also the throttle position using OBD to see what's going on.

That list of errors may mean you have water in the PCM... Or a bad battery / power.

 

Cheers V8
A welter of useful information.

A new battery has flattened overnight in my car. They never last as long as they should. So I suspect that's my problem .. I blamed the BCM going haywire.
Maybe an auto electrician is the go?

I thought I heard something before it failed that was towards the front .. but may be my imagination
I have a conversion because I have to drive left-footed (stroke). Is that likely to have contributed to the acceleration problem? I could have had my foot completely off the pedal but it still kept going. It's like cruise control had chucked a wobbly. No problems with carpet either time. It may be unrelated to the other failures, but just happened at same time? 15 years of reliable driving and then two problems at once.
I'm clueless over the location of the control modules.
I know there's an acronym list here somewhere (witness my use of CM instead of BCM). If you could point out where it it it would help me decipher those that you used.

 

You'd need to go hunting to find why you have a drain - see threads about
quiescent current

The accel problem sounds likely due to the conversion. The cars simply don't ever do it unless monkeyed with or a problem along the lines I mentioned.

The acronyms are linked from my signature - it's with every post.

It is here https://www.jaguarforums.com/forum/s...-jaguar-78910/

Whatever you do do NOT swap parts by guesswork as it will likely be very costly.

 

Do yourself a YUGE favor and figure out what is draining the battery, versus making an expensive guess:

https://www.jaguarforums.com/forum/s...-drain-123535/


Be forewarned it can be a slow process to troubleshoot, as you must let the car rest and go into sleep mode.

 

Cheers mate. Will do everything you recommend.

 

This is what I have thus far and with the exeption of attempint to repair the blown part, what I have done about it ..

Kindly pass on to Norton Ford Stawell

Hi guys/girls

These are the three things you need to do/read before servicing Gavin Quick's Jaguar S-series

1. Vcats label for electronic modules is in the boot, on the rear panel where the bumper bolts to. (see attachment .jpeg to know what you're looking for)

I can source one for free as long as it is compatible. I need a pic of that label so my supplier can read it and see.
Not that I'm requesting it, but it is CRITICAL that the current one NOT BE DISCARDED as it contains programming unique to my vehicle alone.

2. Checking quiescent current battery drain (see attached instruction .pdf)

Step #2 (see .pdf attachement) is to check for quiescent current battery drain, a simple but time consumig process. This is in case the battery is the problem. I suspect both battery drain and BCM. But I'm the least mechanically minded person I know so I'll defer to other's thoughts.

3. Read what has already been done at Eason's, so as not to repeat it. That info is attached above as well.



Step #1 above is to check for compatibility of one I can source for free.

Step #2 is searching for the source of my battery drain.
The instructions are very easy to follow but need to be followed to the letter.

Step #3 is to read the work already completed at Eason's so as not to repeat it



When the car stopped last time, every single dash warning light came on as it gave up.
I think I heard an electrical blow-out immediately prior.
I blamed my Body Control Module.
It was subsequent to it having been at Easons.

The most problematicv is my cruise control attempting to accelerate and nothing I can do to stop it other than braking firmly but gently with engine screaming, pulling off to the side of the road, coming to a dead stop and then turning my ignition off. I can restart with no issue, until the next time it repeats.

The issues that can be traced back include my dash oil light and brake light coming on, my wipers operating outside my control, my door locking and unlocking repeatedly, a warning message that I have an unlocked door when all doors are secure, my headlights turning off without warning.

I hope this makes sense.
I've been without the old girl since before Christmas now. Because she has a $2000 + conversion to LHD to deal with my stroke, it's not easy to buy a replacement.

Cheers
Gavin Quick

 

I doubt it's whichever BCM (front or rear) is meant.

More likely something related to the PCM (aka ECM) particularly its input(s) or its perception of the input(s).

I'd start with OBD readings of the inputs (sensors) - just with engine off (you need ignition on) initially and then if all ok at idle.

Are such as IAT, ECT, MAF, TPS & then RPM & O2 readings plausible? (Post them by all means.) And any others you grasp or wonder about.

I suspect you'll have (pending code) P1000 rather than P1111 and we can investigate maybe.

A quick approximation to your engine & what the PCM is sensing/controlling https://web.archive.org/web/20220409...com/page02.htm

 

Ta mate
I'll pass it on to my mechanic
I hope it doesn't cost me much extra

 

You could do the OBD yourself. Tools start under $5

 

Without getting a solid set of codes from the Jaguar SDD system there is little info to go on as to what the problem is?
I am still not clear but do you have a BCM error code and can you post it?
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No .. the car is at a garage .. I was expecting to get it from them

 

OK post back if you can.
Hope it won't be too expensive!
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Thanks. I will as soon as Norton Ford respond

 

What tools do I need?

 

Horton Ford cannot locate it
It looks like a tow to Melbourne

 

Sorry I don't understand? Tools for doing what?
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It's fine. I've since made other arrangements. Sorry for the confusion