Yup, sounds like the typical CJB issue that several people have reported here.

 

Sounds like they didn’t follow the proper procedure when disconnecting your battery? If so i’d say it’s up to them to fix not you?

 

It's always the battery.

 

There are 2 issues with the facelift xf. I have attached the 2 TSB's for your info.

Jaguar-TSB-XF-Loss-Of-Central-Locking hosted at ImgBB

Image Jaguar-TSB-XF-Loss-Of-Central-Locking in Johnw777's images album

ibb.co

X250-2012-2015-Washer-Bottle-water-ingress-into-CJB-Service-Bulletin hosted at ImgBB

Image X250-2012-2015-Washer-Bottle-water-ingress-into-CJB-Service-Bulletin in Johnw777's images album

ibb.co

You can overcome the lock issue with programming, but the issue will return the next time the battery is disconnected.

 

The garage broke your car by not following the correct process of disconnecting the battery, as published by Jaguar, therefore it is their cost to fix.

 

Do you by any chance have that procedure available to share?

 

Is that really the issue here? Isn't that procedure just there as a workaround to the root cause of the issue, which is a faulty CJB?

I don't think I've ever knowingly followed a Jaguar procedure to swap my battery over. I've had it off the car several times this year when I was diagnosing my battery drain issue.

 

Did Jaguar actually publish a procedure for disconnecting a battery?? I think this was just generated by people in the many forums to overcome the faulty fuseboxes used by jag. Nothing like this was needed for the pre-facelift or the late cars like the x260. I don't blame any garage who disconnects a battery as part of working on a car. Lets face it we are told to disconnect batteries before working on certain areas of the car.

 

Yes, not following the procedure befere disconnecting the battery does seem only erratically to affect some computer modules on the car.
But following it is pretty simple: shut down the car, open the boot/trunk, shut all doors and then take the key fob several meters away from the car (or put it in a metal tin or faraday pouch). Then wait for around 30 minutes before disconnecting the battery.
I accept that this may not always (or often) be required but, since it is a pretty simple procedure, I think it is worth following "just in case".

 

Can't locate it now but pretty sure I've seen Jaguar publication of the process and time to allow for various models to shut down?

 

Yes I have seen something that shows how long it takes for the car to shut fully down, but that would apply to the early x250 but you have no issues when pulling the earth off on that car. That chart was just to tell you when not to see power draw, if you were say chasing a battery drain issue ie wait 30mins before taking notice of any drain.
The facelift car has an issue with it's fuseboxes eprom not retaining it's information & replacing the fusebox overcomes this fault in the componants used, that previous models never suffered. Cost cutting gone wrong again, just like the washer pump failure on the facelift cars.

 

Hi again,

Thanks for all your input! 🙏

A few thoughts / questions:

Is it normal practice to disconnect battery when performing body work / repair?

Since it’s only the pump that’s not working all other systems running from CJB is okey, can CJB be rebooted / reset?? (When measuring voltage the CJB is feeding the pump with constant 6v when ignition is on)

Does anyone have the proper procedure for disconnecting the battery from Jaguar to share?

As you may understand I’m not about to buy a part that cost the same as the value of the car😅 I’m really trying and hoping for a solution that is kinder to my wallet.

Thanks again for all your help and support🙏

 

In the meantime keep a squeezy bottle of screenwash in the car. This worked for me as a lad in my old banger.

 

This is what to look for if you have the washer issue..... xf-fusebox hosted at ImgBB

You can pull out the top left plug from the fusebox without disconnecting the battery.

 

Unfortunately not, it was something I read online, somewhere, possibly a TSB. It also didn't as far as I can recall, explicitly say "Don't disconnect the battery because.....".

 

Thanks, 🙏
I’m actually pretty desperate and also frustrated of the ridiculous price JAG wants for a new part. Seems like a programming glitch and my hope is for a reset / reboot possibility…

 

It's not that simple, it needs a certain process running via SDD and should that not work then the CJB needs to be erased and reprogrammed. A dealer cannot (or rather will not) do this, it needs a knowledgeable independent Jaguar specialist. Loads has been covered on this, search the forum.

 

Again, a sticking plaster for a bigger problem with the design of the electronics.

 

Hi all fantastic Jaguar enthusiasts!!

PLEASE HELP ME 😅

Pushing the button, wipers work but no fluid.

Trouble shooting, my own and repair shop:
Pump is okey
Fluid tube free of obstruction
Faulty code: U3002-81

This actually happened when the car was in for body repair. They changed head lamp front passenger side, the whole bumper and front passenger body plate over wheel. I thought they had done something since the pump sits behind on that side of Polaris RZR PRO XP Accessories.

Now they tell me that I need to change, buy a new CJB/BCM. This cost here in Sweden around 14 000 Eur!!!

I have previously encountered another fault where the car and the keys dropped communication when the car had been without battery, this they managed to fix with computer. I have a suspicion that something similar have happened now. When the keys fell out they where talking about changing the fuse box in the boot…

is there anyone her that have some input that can help me?

Kind Regards
Philip

My wife is a nurse and needs her car daily. We thought it was the icy cold weather and the windscreen washers had frozen up, but the washer fluid was ok and still fluid in the reservoir, not frozen. But even today, the front washer jets are not working and it's 6 degs C today. The wipers are wiping as expected when the wiper switch lever is on, but pulling back to make it wash the windows does nothing and the wipers just mess up the screen! How do I begin to even diagnose such a problem? Need you Help please all! It's rather odd this because the rear washer and wiper works perfectly!

 

Has the battery been disconnected recently?

 

I presume it's a sportbrake given rear washer is working, and the same two wires connect for forward and reverse from the BCM to the pump, I'd suspect a blockage in the front pipework, a defective pump, or dodgy non return valve.

If you can hear the pump run, and get a tiny amount of washer fluid if you hold the control for a few seconds, I'd definitely think the non return valve, ( it's a t-piece type, and is under the "trap door" for the brake fluid, a few threads on it if you search )

BTW the official jaguar pump for the sportbrake ( £116 ) is no longer available, I've been using a Febi 34863 ( < £14 ) see https://www.amazon.co.uk/dp/B006DHVYVI for near 2 years now without issue.

 

Hi everyone, I’m currently troubleshooting an issue with my Jaguar XF Sportbrake (2013) and hoping someone here might have some insight. The headlight washer system is working fine (it activates on every third press as expected), but the windscreen washer pump doesn’t run at all. Here’s what I’ve done so far:

• ✅ Washer switch on the stalk: tested and working correctly
• ✅ Windscreen washer pump itself: tested independently and fully functional
• ✅ Wiring from BCM to the pump: continuity tested and no faults found
• ❌ BCM output: no 12V + or ground being sent to the pump during activation

So, everything from the switch to the pump is working – the problem seems to be that the BCM doesn’t activate the pump circuit at all. Has anyone had this issue before? Is there something in the coding, a relay inside the BCM, or a known fault that could cause this? Thanks in advance for any help or advice!

 

Hallo, ich habe das gleiche Problem. Wie hast Du es behoben?

 

Hi everyone,



I’m currently troubleshooting an issue with my Jaguar XF Sportbrake (2013) and hoping someone here might have some insight.



The headlight washer system is working fine (it activates on every third press as expected), but the windscreen washer pump doesn’t run at all.



Here’s what I’ve done so far:

• ✅ Washer switch on the stalk: tested and working correctly
• ✅ Windscreen washer pump itself: tested independently and fully functional
• ✅ Wiring from BCM to the pump: continuity tested and no faults found
• ❌ BCM output: no 12V + or ground being sent to the pump during activation

So, everything from the switch to the pump is working – the problem seems to be that the BCM doesn’t activate the pump circuit at all.



Has anyone had this issue before? Is there something in the coding, a relay inside the BCM, or a known fault that could cause this?



Thanks in advance for any help or advice!

 

Has rear wiper stopped working as well?
Did it happen after a battery disconnect or low battery?

 

The battery was replaced by the previous owner. The rear wiper does not work.

 

Ok this will be because of corruption of the emulated eeprom in the BCM, I suggest you attempt recovery from the dflash, but you may still need it reprogramming with SDD afterwards depending what the previous owner did.

The following post explains / links to posts explaining what needs doing.

Car won't start after new EGR installation - Jaguar Forums - Jaguar Enthusiasts Forum

XF and XFR ( X250 ) - Car won't start after new EGR installation - Good morning all. This is my first post. I am seeking help with my XF 2.2 X250 2013 Sportbrake. 1. My EGR was leaking coolant in front of the metal gasket. 2. I have bought EGR unit, second hand, perfect condtion. Did inspect it...

www.jaguarforums.com

If you don't fancy doing it yourself and would rather pay someone to do it, I suggest you get in touch with Dirk (@sandmaennle ) as he's done a few and is also in Germany.

 

Hi @ipodyu23
I just saw your PM. It really looks like a corrupted BCM. Can you just post the last 6 digits of your VIN? I just want to check, if your XF is one of my "patients" .
Where are you living in Germany?
Do you have SDD and know how to use it?

Cheers
Dirk

 

Ja ich komme aus Deutschland. Ssd? Kenne ich nicht bzw. nur als Festplatte. S84406 sind die letzen 6

 

SDD nicht SSD 😊 Jaguars eigene Diagnosesoftware System Driven Diagnostics

 

Hallo, ich habe genau das gleiche Problem. Wie hast Du es behoben?