Hi All
I have various issues that are so annoying!

1/ Restricted Performance without loss of Power Amber Warning (Poss Handbrake Issue?)

2/ When switching Lights or Washers to Auto this seems to make the DS Window work itself randomly down, switch will not work it?

3/ My Key Fob has just stopped Unlocking/Locking the Car? New Battery Fob a couple of months ago?

Any Suggestions or Cures please let Me know

 

#1 suspect - battery failing.

 

Thanks JagV8 but I fitted a New Vehicle Battery in March?

 

Could be flat or faulty. Still #1 suspect.

 

Does sound like battery or charging issue screwing with the moduals.
Test voltage befor you start the car , then test wile running ,
If its pumping around 14v in wile running ,then alternator is fine .
then trickle charge the battery and get it load tested ,
Also once it's fully charged perform a hard reset . Instructions for hard reset or reboot are all over the forum ! Good luck

 

OK Thanks Andy I'm going to try that

I looked at Part X'ing as would like a New Shape XJ 5.0 but was insulted that without seeing it a Guy said £2k !!

 

OK, So an update!
It turns out that Yes even My New lifetime Guaranteed battery was indeed FLAT!
Why? Well I can't properly see the Alternator Belt so can't access wear n tear and bearing in mind that the car is 14yo I'm thinking into Jaguar for a Replacement Alternator and Belt?
Would you guys agree?

 

No. Assuming it's this component or that will quickly drain your wallet without necessarily fixing the problem. Do some simple tests to see if the alternator is charging or if there's a drain after the engine is shut off.

If you don't DIY, find an indy that will do the test.

 

OK Thanks Mikey

 

If I put a Volt Meter across the battery then run the car what Amperage / Volt etc should I expect?

 

Volts well over 13, maybe up to 15.

Should start higher, then it is switched lower - you know you REALLY want to read this stuff in the free download JTIS workshop manual!

 

Excellent, 1st thing in the AM I will carry out test - Cheers

 

I'll look for the manual now

 

Near top of forum.