XJ40 ( XJ81 ) 1986 - 1994

Limp mode

 
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Old 05-08-2019, 05:50 PM
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Default Limp mode

Hi all, I had issues the other day with rewiring a stereo in my 91 vanden plas, i now have that completed and when I started the car I had a lightning bolt and a circle through the transmission, neither of these were present before the stereo job but now the vlco says fuse 2 and the car is stuck in what I believe to be limp mode as it doesnt shift nor will it let me shift in j mode. The only thing I can think is that I broke the sport mode button, however I didnt break the actual harness only the peice that engages it but I have no clue what is going on with it, thanks in advance.
 
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Old 05-08-2019, 05:53 PM
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Default Limp mode

Even if that button is the problem and I can temporarily jumper it out as I am leaving for a little trip in the morning and obviously dont want to drive 3 hours on the turnpike in limp mode
 
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Old 05-08-2019, 07:19 PM
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The lightning bolt usually means a blown fuse, which would correspond to your Fuse 2 warning, which if I recall correctly indicates a blown fuse in Fuse Box 2. I think I recall that Fuse Box 1 is at the base of the Right Hand A-pillar (U.K. driver's side). I think Fuse Box 2 is the one at the base of the Left Hand A-pillar, and Fuse Box 3 is the one in the center console.

There's a good chance you managed to blow a fuse related to the transmission or J-gate. Very easy to do if you're working in the center console with the battery still connected (a no-no).

The label inside the fuse box cover will help you identify the most likely suspects, but you may have to test all the fuses. The fastest way is to use an ohmmeter and touch the probes to the exposed terminals at the corners of each fuse.

Cheers,

Don
 
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Old 05-08-2019, 07:30 PM
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Default The lightning bolt usually means a blown fuse, which would correspond to your Fuse 2

Thank you very much, the only problem I have is that I was afraid that was where it was and some bozo removed the fuse description on the left pillar fuse panel cover......I tried to read the diagram but I pretty much just ended up with a headache when it cam to fuse descriptions.....I know for sure I blew the radio fuse on the passeneger side twice but I didnt realize I blew anything else, the sport button switch shouldnt be an issue though?
 
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Old 05-08-2019, 09:28 PM
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Originally Posted by Galaxie390 View Post
...the sport button switch shouldnt be an issue though?
A fuse related to Sport Mode could possibly contribute to Limp Home Mode, but I don't know if breaking the switch could cause LHM.

I believe the Driver's Handbook has charts for the fuse boxes. Unfortunately they don't seem to be available as free pdf downloads, but they do show up on eBay frequently.
 
 
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