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Discussion Starter #1
Hi, I've had an issue for the last few weeks whereby I go to start my 62 plate Jaguar XF Sportbrake and I get a myriad of warnings.

At first it started with a single DSC Unavailable. hen the Par Brake and Emergency Parking brake warnings followed... soon the Gearbox, ABS, EBD , Blind SPot warnings joined the party !!!!

I spent some time on the forums reading through solutions. The majority pointed to a new battery, which I purchased and fitted...doesn't seem to have cleared the issue...

I'm awaiting a replacement brake pedal switch, but I honestly don't hold out hope on that.... Is there anything else I should be looking at, other than asking Jaguar to take a look ?

Regards

Richard
 

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Hi Richard

Are you certain your new battery is fully charged?

And do you have any voltage readings from it, both with engine off and when running (i.e. charging)?
 

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It’s generally battery related but I also get this when I update the FW on modules. I have to lock the car for an hour and come back. It could be CJB water damage. Have you check the connectors? Bear in mind the brake pedal switch is for brake lights. It’s not the one that senses you have pressed the pedal to start the engine.
 

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Yes, the OP's description of those symptoms just screams "battery". And if the new battery hasn't immediately cured the issue I'd agree about charging it, plus resetting the battery module.

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Hi @wilf , I put my new battery on charge overnight before fitting it... got 14.7V when connected it to the car :) Have read the battery / XF need to be "synced" by Jaguar but was hoping that wasn't necessary.

@hamedhbb, thanks too. Had the car locked overnight so can exclude that, will double check the connectors in the CJB

Yes, the OP's description of those symptoms just screams "battery". And if the new battery hasn't immediately cured the issue I'd agree about charging it, plus resetting the battery module.
Cheers @OBC John, can a lowly person with a spanner and some enthusiasm reset a battery module, or is that a Jaguar dealer skill ?
 

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Hi @wilf , I put my new battery on charge overnight before fitting it... got 14.7V when connected it to the car :) Have read the battery / XF need to be "synced" by Jaguar but was hoping that wasn't necessary.

@hamedhbb, thanks too. Had the car locked overnight so can exclude that, will double check the connectors in the CJB

Cheers @OBC John, can a lowly person with a spanner and some enthusiasm reset a battery module, or is that a Jaguar dealer skill ?
Hi Richard: A lowly person with an iCarsoft LR v2 can reset said module. If you don't have one, let us know where you are and perhaps a nearby FM can oblige.

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Discussion Starter #7 (Edited)
Hi John, I consider myself lucky my wife allows me the spanner! To have a functioning diagnostic tool, other than this forum, is the holy grail! I’m based in Kidderminster, Worcestershire if there was anyone close by?
 

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Hi John, I consider myself lucky my wife allows me the spanner! To have a functioning diagnostic tool, other than this forum, is the holy grail! I’m based in Kidderminster, Worcestershire if there was anyone close by?
Well, as it happens, I live in Halesowen and do possess such an instrument. If you'd like to PM me your address, perhaps I can pop over and we can see what we can see.
 
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Fitting a new battery is only part of the job unfortunately.

You need to make sure the new battery is fully charged before fitting it. I left mine on charge overnight before fitting it. You also need to reset the BMS (Battery Monitoring System) on the car once the new battery has been fitted. I didn't and was getting spurious errors until the BMS was reset.

David.
 
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Hi, I've had an issue for the last few weeks whereby I go to start my 62 plate Jaguar XF Sportbrake and I get a myriad of warnings.

At first it started with a single DSC Unavailable. hen the Par Brake and Emergency Parking brake warnings followed... soon the Gearbox, ABS, EBD , Blind SPot warnings joined the party !!!!

I spent some time on the forums reading through solutions. The majority pointed to a new battery, which I purchased and fitted...doesn't seem to have cleared the issue...

I'm awaiting a replacement brake pedal switch, but I honestly don't hold out hope on that.... Is there anything else I should be looking at, other than asking Jaguar to take a look ?

Regards

Richard
Hi Richard, is it anything like this:

If so have a look here: Gear Box Fault, Parking Break Problem, DSC not working.

Mine however only does it when it is or has been raining recently, a couple of dry days and the problems disappear, are you aware of the windscreen washer pump issue and the resultant damage to the CJB/BCM? I don't think it's that though as mine was replaced and the problem persists.. it is worth changing the washer pump though and splicing the electrical cables to it to make sure you don't get the problem, CJB's aren't cheap.

I discovered last week that turning off the heating/cooling stopped the problems after a restart of the car even though heavy rain persisted, I suspect that I have water ingress from a bad seal along the bottom edge of the windscreen, it's now been sealed and the atrocious weather we are going to have tomorrow will prove whether I'm correct...
 

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Hi Richard, if you decide to disconnect, then reconnect the the EPB/M (Electric park Brake Module) to clean the connectors in the hope that it might help, then make sure you've read the attached first.. I have no idea how much of an issue it is if you don't.. I've just followed the procedure for myself after replacing that module and I merely had to reset the parking brake by following the instructions on the dash, "Press brake and apply handbrake" or something very similar, nothing too taxing... :D
 

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Discussion Starter #12
Thanks for the replies, @PeteA it does look like the same issue. I will have a look at the module, hunt it down in the rear panel and see what the connections look like :)
 

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Hi Richard, my contacts were clean and dry.. and a new module made no difference, hopefully you'll have more joy than I though, good luck and do keep reporting back on how you get on.. (y)
 
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Discussion Starter #14
Hi Richard, my contacts were clean and dry.. and a new module made no difference, hopefully you'll have more joy than I though, good luck and do keep reporting back on how you get on.. (y)
Hi Pete. Finally got the card off after third attempt. I was being too cautious !

The connectors all look good too

Now trying to get the third nut off the back to remove the module ! It wasn’t designed to make it easy !
The version of the module is Rev 2



But I really dont hold out much hope of it being the module. There is no sign of water ingress…


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Hi Richard, yes they are a struggle to get off the first time, after that you just become brutal with them!!

Don't bother trying to get the third nut off, it doesn't exist!! or at least it didn't on mine, the black cover above 'just' lifts up, when I say 'just', I mean with a loft of effort and some carefully timed profanity It isn't secured in any way except awkwardness...

Do remember the connector connecting sequence in the PDF above.
 
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Discussion Starter #16
Update. Bought a replacement parking module off eBay. Same revision number but from a 15 plate so, in theory, 3 years less wear and tear!
Fitted it, replaced battery that I’ve had on charge to top it back up and ….. made no difference whatsoever, grrrrrr.
Only other thing someone mentioned was a possible bad earth. Will look into this, else it will be off to specialists to diagnose !


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Please keep us updated Richard.. (y)
 

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Update. Bought a replacement parking module off eBay. Same revision number but from a 15 plate so, in theory, 3 years less wear and tear!
Fitted it, replaced battery that I’ve had on charge to top it back up and ….. made no difference whatsoever, grrrrrr.
Only other thing someone mentioned was a possible bad earth. Will look into this, else it will be off to specialists to diagnose !


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Sorry to hear that Richard. I do think you're going to have to bite the bullet and get it lifted to a Jag dealer (or good indy) and get the issue definitively diagnosed. Anything you think of that I could help, please say. It took me 25 minutes to get to you!
 
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Sorry to hear that Richard. I do think you're going to have to bite the bullet and get it lifted to a Jag dealer (or good indy) and get the issue definitively diagnosed. Anything you think of that I could help, please say. It took me 25 minutes to get to you!
Thanks for the offer John. Will keep you posted


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