I installed the Advance Auto H8 AGM in my XJR. In 2014. Still works fine. Seven years.
I looked at the date installed this week while swapping a rear strut.
Turning the front rotors today. Slight shimmy while lightly breaking .

 

Hi Chris,

Is the 5 minute limit something you found in the Jaguar documentation, or something you measured on your own vehicle? If the latter, what was the state of charge of your battery when the charging voltage went high? Was the charging system heavily loaded (e.g. high-beam headlamps on, climate system blower fan on high), or unloaded? Just curious if you found any clues as to when and why the voltage goes high, and why it might do so for a maximum of 5 minutes.

If I recall correctly, the description of the charging system in the documentation is rather cryptic on details.

Cheers,

Don

 

Hi Don,
"5 minutes" of high charge is the time period I've always measured. (at benign temperatures)
The fact that there is a time period (actually 3 possible ones) was in some documentation kindly supplied by you.
Still Available?? Exide Global Extreme - Jaguar Forums - Jaguar Enthusiasts Forum (#14)

Those cunning brits never mention actual times in the documentation, they just say that there are, and that way they can't be caught out!
The page is from "page 148 of the Technical Guide" apparently. Is this in the sticky's? All I know is it took me forever to find the correct "Owners Handbook" for my model, though I did eventually from the sticky's.

Cheers, Chris

P.S. Varta is sold here, but trying to find something with "silver" in it is a mission worthy of NASA.

To answer another question, my battery is always fully charged, as on a charger. I think I have seen the charging switch back to "high voltage" whilst driving, but of course I'm not really paying attention by then. I have a permanent voltage display plugged into the cig lighter.

 

SOLVED: It was the RR air suspension unit (strut).

Because I had a spare strut, I decided to replace it without spending more time in diagnosis. While in there, if I had found something obvious, like a cut hose, I would have addressed it, but in the absence of anything substantive, I would just swap out the strut and see what would happen. It worked.

Except for aligning the strut to bolt in the top, it was a very easy job to unbolt (13mm) four nuts on the top, remove the air hose (10mm) and sensor, unbolt the bottom bracket (20mm) and stabiliser arm (either 13 or 15mm, can't recall) and drop the old unit out. Inserting the new unit is best done with two people, one on top with a small diameter pipe or rod (I used a 3/8" drive socket extension) to align the sensor hole with the middle of the strut opening in the boot (trunk), while the person below is told to rotate the strut until the four bolts come through (tighten to 25 Nm/18 ft-bs). I used a bottle jack to compress the strut so the bracket bolt would slide in. Then bolt on the nuts, bolts, hose and sensor, and with the usual turning on and off, parking brake reset, etc., the system resets itself. I had watched the Arnott's video so I disconnected the battery, but in hindsight the video seemed to be a bit laced with lawyer labels; not sure why the battery should be disconnected as the only electrical item is the sensor - and it talked about specialised tools when basic sockets and wrenches was all I needed (although for the bottom bracket I used a socket wrench with an 500mm arm to get leverage for removal). Also see https://www.partinfo.co.uk/files/AS-2888.pdf

Question: Does anyone know what the factory torque settings should be for the bottom bracket, stabiliser arm and air hose? I set to what felt right, but would feel more comfortable using the factory-recommended settings.

All four struts returned to correct height, test drive returned the XJ6 to its magic carpet ride quality, and since I had the right parts (the person who sold me the car threw in one new front strut and two used but good rear struts) and a bit of time, it only cost me a new pair of pants and a shirt, since I had forgotten I was supposed to go to a party, and my wife was already on the ferry. Memo to self: include change of clothes in the boot.

Afterwards I did a google search on fault code C2303 and found this thread that contains a wealth of knowledge, but requires reading 4 pages.

Question: Does anyone know of a Wikipedia type website where we can enter the title as a Jaguar fault code and then we can add our own experience or postings found on this forum? The benefit of that type of format is immediate access to the key information in one place with the best practice emerging as it is edited, rather than layered as with a forum.

On a late model car, the problems will be what the code books say, like faulty strut or air leaking, but once cars get old, it can be weird stuff like posting 18 in the link "the hose going into the air tank... was totally disconnected" but he only discovered this by accidentally bumping it.

 

Congratulations x350, and thank you for posting your resolution! I'm glad it was something common and easily resolved.

The trick I came up with is to use vinyl tube with an inside diameter that will just slip over the air spring/damper mounting studs (8 mm - 5/16 in.?). Cut two lengths of the tubing about 2 feet / 600 mm long. Fit the tubes onto the studs that will go through the two larger holes in the body. Fit the other ends of the tubes up through the larger holes in the body, and the tubes will guide the unit into position as you raise it. The job is definitely easier with two people, but the tubing method makes it possible with one.


All of the torque specifications you need are available in the Chassis section of the Workshop Manual. You can download the entire manual for free from this forum at the six links below. These are also available in the 'HOW TO' Quick Links thread on the home page of this X350 forum (lots of helpful info and links there):

Table Of Contents

General Information

Chassis

Powertrain

Electrical

Body


I don't know of a site as you describe - feel free to create one!

Until you find time to create your Wikipedia, you can download one of the more complete versions of the DTC Summaries manual at the link below (it's 153 pages long). The manual lists definitions and possible causes for each diagnostic trouble code. Of course, in the years since it was published, owners and technicians have discovered possible causes that were unknown to the engineers at the time of publication. For example, a worn compressor piston ring can trigger C2302, which is now common knowledge among members of this forum. But overall, the DTC Summaries manual is incredibly helpful. For example, one of the possible causes it lists for C2302 is an "air leak," which is exactly what you discovered on your car.

See? The Jaguar factory documentation is really quite good (for those who bother to consult it ) !

Jaguar X350 DTC Summaries


Cheers,

Don

 

OK, I've created it on Wikipedia. See https://en.wikipedia.org/wiki/Jaguar_XJ_(X350) and scroll down to List of DTC Codes. I have no idea if it will survive the volunteer editors of Wikipedia.
If it does get removed, I would appreciate if members enrol with Wikipedia and then protest its removal. Demand they justify their action as it is appropriate for an encyclopedia to have references that can be looked up.

Note that I added a column "FIELD FINDINGS (AS CARS AGE)" where I inserted the 2011 XKR throttle body error code that turned out to be a corroded fuse box. If Wikipedia allows the list to stand, that is the column we would edit to add field notes that only pop up as the cars get older.

Also, Don, did you know that links to jaguarforums.com is blacklisted by Wikipedia? You should ask Wikipedia to explain why.

 

I didn't know that, but I'm just an unpaid volunteer here, so I leave those matters to others.

 

"Blacklisted" might be an exaggeration, in general the internet is not considered a "reliable source" by Wikipedia standards. Otherwise we'd all think the election was stolen!

I counted in the Wiki X350 (these counts are hard for me), 142 PgDn pages of which 137 pages was DTC codes or 94.5% of the article (and 7 pages of mainstream stuff).
Perhaps you might consider creating a separate wiki page and link to it from the main page.
Other than that, presumably I have to go through DonB-posted 153 official pages first, and then try and work out the difference? I think I need a computer to check the computer, and a robot to do the repair would be nice too.
Cheers!

Edit: might have been 145 pages, I see the maths is wrong but the % was correct last night!

 

Not an exaggeration, blacklist was the term used by Wikipedia when I went to post the data and it gave me a error message. I then searched for another source of the same data and it accepted it. It does have a process where a blacklist can be appealed.

I then joined the automotive group on Wikipedia and propose a formal repository of proprietary DTC codes for older cars when the manufacturers stop supporting older cars in the dealer systems. Someone responded that it would never happen, the manufacturers jealously guard such data. No surprise there, this was the usual negative response so typical of Wikipedia gatekeepers.

So, in playing the chess game, I next wrote Jaguar in the UK to ask if they would consider formally releasing DTC codes for cars older than 10 years - open source (copyleft) them and they post them on Wikipedia. If anyone is in the UK and has some connections within Jaguar, or likes to talk themselves into head office, my sense is that this is the way to get it done. If I were in the UK, I would do it myself; it's often quite fun as it is out of the ordinary for middle-level management in car companies, and often it results in a new friendship.

I think this would be a worthwhile effort, and from the company's perspective, seeing older models of their cars on the road is great PR. Jaguar is especially suitable for this, as the English cherish their heritage. The fact is since the turn of the century, cars are becoming more like computers, thus they require a different understanding to keep them on the road... and the DTC codes, with footnotes added by mechanics and DIY owners addressing the aging issues not anticipated in the original code probably causes, is an important reference library to keep them running.

 

Your enthusiasm is very worthy. I was merely saying that 137 pages of DTC codes does not belong on the main X350 page (and suggested a solution). You need to step back a bit to see this from a neutral perspective (on Wikipedia). (For example, I might want to lookup Bristol cars, and don't expect to be confronted with what amounts to part of a technical manual)
Cheers

 

The official Jaguar DTC Summaries document I linked to earlier is easily searched using the Adobe Acrobat Reader search function (Ctrl+F or Cmd+F). Enter any code or other search term and you can find all instances in the document quickly and easily. I haven't tried that yet on the Wikipedia page x350 has added the DTC list to, but I would assume the same type of search functionality exists.

I service many of the modern Jaguars in our local British car club, so I use the DTC Summaries quite frequently, and I would say that the published possible causes are applicable to more than 95% of the malfunctions I encounter. That doesn't make them all easy to diagnose or resolve, but it certainly helps narrow down the diagnosis. My point is, don't disregard the Jaguar documentation. A complete library is readily available for download from this forum and other resources, and the Jaguar documents are actually far better than those from many other automakers. The more familiar you become with the available resources, the better equipped you will be to maintain and repair your Jag.

On the other hand, I find that many of the anecdotal resolutions posted or suggested in forums and on YouTube are a crapshoot. Maybe 50-60% of the time they help resolve an issue I am diagnosing, and 40-50% of the time they do not. So anecdotal resolutions can be helpful, but are no substitute for sound diagnostic practices.

Cheers,

Don