[chrisjp]

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".

 

[ChrisSB]

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

 

[geteh]

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!

 

[Horlicks]

Has the battery been disconnected recently?

 

[xf_phil]

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.

 

[ipodyu23]

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!

 

[ipodyu23]

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!

 

[xf_phil]

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

 

[ipodyu23]

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

 

[xf_phil]

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.

 

[sandmaennle]

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

 

[ipodyu23]

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

 

[Gav]

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

 

[sandmaennle]

Not one of "my patients"

SDD nicht SSD 😊 Jaguars eigene Diagnosesoftware System Driven Diagnostics

uuuhh...Gav....speaking German Cool

Thanks @ipodyu23 for your mobile phone number. I will call you later on.

Cheers
Dirk

 

[Gav]

Not one of "my patients"


uuuhh...Gav....speaking German Cool

Thanks @ipodyu23 for your mobile phone number. I will call you later on.

Cheers
Dirk

Nur mit Google Translate Hilfe, Dirk, sorry!

 

[Ralf]

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

 

[Ralf]

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?

 

[sandmaennle]

Not yet @Ralf .
@ipodyu23 is trying to check with the previous owner, if he had any engine start issue after changing the batteries.
Afterwards he will decide if it's worth to travel 600 km to me and give the BCM reflash or reconfig a try.

Hi @xf_phil, did you ever had or heard about a facelift XF with a washer pump issue without having all the other issues like "Lost keys" or "Central locking not working" ?
Me, no. Always had "No cranking" and "Smart key not found" before the washer pump issue.

Cheers
Dirk

 

[xf_phil]

Hi @xf_phil, did you ever had or heard about a facelift XF with a washer pump issue without having all the other issues like "Lost keys" or "Central locking not working" ?
Me, no. Always had "No cranking" and "Smart key not found" before the washer pump issue.

Cheers
Dirk

My car came back from it's timing belt change, would run fine but no washers/rear wiper. (No central locking too, but I think that may be something to do with door modules as seems really much more common than bcm issues ). Strange thing was I could disconnect and reconnect the battery without change (I was expecting smart key not found, as I figured they had quietly attempted to fix with sdd in the extra few hours they kept my car), so that makes me suspect they might not have done a fix. I recovered eee from dflash, so know it wasn't that it had been written with a saloon image.

 

[sandmaennle]

OK. Thanks Phil.
So very mysterious. Since all other stuff is working with his XF. Looks like we will just have to try it with recovering or a virgin file to see if the pump will be working afterwards.

Cheers
Dirk