Don't know where to startIt all started when one day it literally wouldn't do anythingI bought carsoftv3 jaguar diagnostic machine and when I read the codes just about every single module shows many many faults.If I disconnect the battery for an hour then sometimes it will start and other times it just turns over.I clear all the codes but they all come back. It literally throws many faults on just about every moduleAny help would be greatly appreciated

 

I won't be the last to advise replacing the battery. Unless you were struck by lightning, it's doubtful every module suddenly failed.

 

It is a new battery. All seemed to start after battery replacement

 

No new battery is fully charged. They sit for months unused in factories, warehouses, on trucks and on supply shelves.
CHARGE YOUR BATTERY using an actual charger, not a maintainer nor 'trickle' charger. Until then, no troubleshooting matters.

 

Yep same here brand new battery last year, had to charge it over night, plugged sdd in and cleared everything and it was very happy after that.

 

Good advice. Brought my VOM to auto parts store. Tested batteries and checked dates. Some were 12.4. Went home w 12.7 (recent date) and charged it overnight to 13.2

 

@John Silkstone , I agree with others that you should make certain you have more that 12.5 v on your resting battery, but simply disconnecting the battery may not be fully discharging all capacitors to perform a hard reset. You should touch the leads together. The following quote is from Jaguar's "Technical Training 688-JAG: Advanced Electrical Systems and Diagnostics", page 3-15, covering Control Module Programming:

 

John can you come back and fill us in?
As posted above a new battery does NOT guarantee you have a full charge. Jaguar wants to see around 12.6 VDC AFTER the car has sat all night.
Can you make that measurement and report back?

It is amazing what low battery voltage can cause.
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I went out a purchased another new battery and left it on charge overnight . No change.
1 time it might start
Another it just turns over
And sometimes it makes a loud beeping noise and brings every error message u can think of on the dash.
Still shows all codes on reader too

 

Ok. Please provide all codes and all error messages.

 

There are 100s of codes lol pretty much every module has multiple. Dash messages are things like gearbox failure, abs failure, can't apply brake, crash sensor, dsc error, bonnet open even when its not. Again there's loads and a loud beep beep beep.
the codes vary each time I disconnect and reconnect battery.
Some of codes are
Bcm
b10ff-11 permanent
​​B1100-11 permanent
Ecm
0616-11
0615-13
0054-00
​​​​

 

Sometimes I get none and it starts straight up

 

It is very difficult to discern what is the root cause without having all of the codes.

if you are absolutely certain the right sized battery is supplying 12.6 v, we can rule that one out.

 

Yeah 💯 proper battery. Ill post all the codes one day in the week when I get an early finish from work. I have done a video of the dash but don't know how to post it

 

great. The video of the dash is of no value to me. They are overly simplistic presentations that may point to any number of root causes. It is only the codes that help.

 

@John Silkstone Welcome to the Forum! You'll find lots of knowledgeable and helpful members here.

Please read the guidance for new members ( https://www.jaguarforums.com/forum/n...-up%2A-241802/ ) which answers many of the most frequent questions about getting started. Because you're a new member, you might be restricted before being allowed to post a new thread.

Since you're in the UK, you can post your video to YouTube UK, and then create a new thread in this Forum with a link to that video.

Cheers,

Stuart

 

Yes videos of flashing lights are of zero value.
Follow what guy is talking about. We need codes but first you need to give us what the car's voltage is after sitting all night. Jaguar wants 12.6 VDC after sitting all night. If you don't have at LEAST this your battery is suspect and should be replaced.

This is the third time we have asked for numbers? What is the voltage of the car after it's been sitting all night?
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The codes or full lights on the Christmas tree give no information except that there is no information. They show up due to either low voltage (now corrected with a charged battery?) or a connection problem in the cables. Look for signs of corrosion on battery area and grounding, and next a bad connection in the big cable CAN connectors under the hood. Just a bit of time and moisture can make a bad connection. Go for the large group connectors first. Thought I had a failing charger, but it was only a failure in a clean immaculate-looking connector combining the various sub-systems.

 

This intermittent situation screams a battery issue. Does the battery read 12.6v after sitting all night without a charger connected? Are the battery leads sound? Are the leads securely fastened at both ends?

 

I had similar issues twice, around 7 years apart, in the 12 years I owned my 2006 XJ8 (X350). The car would go into limp mode and throw up multiple warnings. After a few minutes stranded at the roadside (swearing and cursing) everything would come right for a few days.
Both times, having established the battery was good, the solution was to have the main electrical loom module connectors cleaned and re-connected. The second time around, the car was being serviced at a different place and they spent a whole day trying to convince me that multiple modules probably needed replacing: finally they just cleaned the connectors like I’d asked them to, and the problem went away!
Not sure where the actual bad connection was, but in my case the “unplug it, clean it, and plug it back in again” approach sucessfully drove the Gremlins back into hiding.

For the 4 months I’ve had my XK, replacing the battery and making sure I plug the car into a trickle charger if I’m not driving it for more than 4 days has (mostly) kept the Gremins away. From what I’ve read in other threads on this forum, I suspect a dead battery in the alarm chirper may be the cause of some battery drain and replacing this on the to-do list.