Happy new year everyone
i have a small problem with my 2004 s type 4.2 v8 had it for 3 years now
Car will not start due to faulty keys
Been to jaguar dealer and been told need new keys
But they need to come for jaguar uk and been advised not sure how long due to covid could be up to 3 months
also had a auto electrielectrician come out said the same thing but he was very expensive at $300.00
so have decided to install a push button start keyless entry instead

Which dose start at stop engine

so please this is what I need to find out

what i need to know is the door locks
Are they negative trigger
or positive trigger

boot release
Negative trigger or positive trigger

Also how do i remove steering wheel lock pin so steering wheel won't lock when driving or key out of ignition
New system has a fuel pump cut off so you cant start car without remote
as i want to keep ignition in place for when keys arrive and in case or emergency

Thanking you
Darrol

 

Sadly this may not be as easy as that as the lock motors are all controlled by the electronic control modules and not direct via any switches. There are three wires to each motor. The modules not only power the door lock motors but also monitor the power drain, the time needed to lock etc.

The boot/trunk release is just a solenoid not a motor, it has a positive trigger but again this is fed from the rear electronics module.

The global lock/unlock switch in the center consol is a switched earth.

But perhaps the full jaguar wiring diagrams will help you. Here is a link below, just download the one for your model year.

Please note that the years shown are model years. You need to check your vin number to make sure you have the correct model year.
This is the 10th digit:

4 = 04 model year. (All made in 2003)
5 = 05 model year (All made in 2004)
JagRepair.com - Jaguar Repair Information Resource

 

What is the fault with the keys?
Also how did the fault happen?
Mellow.

 

I would dump the idea of a button start and just reprogram the keys. How many keys do you have?
What changed as they don't really go bad?
Is the PATS light blinking? Do you have SDD so you can find what errors the car is throwing?
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hi we have had car on scanner no faults
two sets of keys wont lock or start car
No idea what happened were out for tea went to go home there was nothing
instrument cluster lights up thats all

 

Sounds like the "scanner" was not adequate.

+1 what is the PATS light doing?

 

hi everything else working great
hi what scanner would you recommend
i have a JLR-DOIP VIC SDD PATHFINDER INTERFACE SCANNER

also car has been to jaguar nz and they couldn't find any codes either
thanks

 

Does PATHFINDER fully support your car?

It's a bit boring to keep asking ... but what is the PATS light doing?

 

hi yes i did think scanner was the problem but unfortunately not
Even the jaguar dealer ship /work shop could not find any codes they said my scanner/laptop hardware was more than i needed
When i lock car with key the pats light will start flashing
but 5 seconds later car will unlock
and i can't lock it again for around one day
Then dose the same again
Thanking you
Darrol

 

That doesn't sound like a key problem. It sounds like an immobilizer/alarm control system fault. Sorry I don't know the jag system enough to tell you how to check it out properly. Someone on here might.
​​​​​​I would start by checking the inputs of the immobilizer, if you can get the data...
If not, it will be tricky.

You could probably try another immobilizer ECU but I would imagine it would need specialist programming to fit. And it may be something else, like a poor earth connection or a broken wire, hence the need to check wiring first.

 

It sounds perhaps like the central locking system thinks a door is ajar, You might want to check the door switches for an intermittently failing unit.

 

Which is probably wired to the alarm/immobilizer system. Sounds like a good thing to check.

 

I agree with the others. I don't think you have a key problem but a PATS problem. When you say it is flashing can you count the number of flashes?
This is very important as I think we might get a code from this that we can work on.

I would stop doing anything else until we can decode what the PATS light is telling us.
Since you apparently have SDD can you use it and go into the Immobilizer section to see if it tells us anything?

I still think there is a code somewhere and the flashing PATS light is indicating this.
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Sorry for being ignorant, buts what does PATS stand for?

 

PATS= Passive Anti Theft System
It's the immobilizer system as it is sometimes called too.
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Aha. Thanks for educating me.

 

The door unlocking could just be a faulty door lock actuator.

 

If you look in the stickies there is a PATS system diagnostic flow chart that may help you

 

You say your car is 2004.
Is it a facelift model with the ?
The facelift 05 model cars were built for january 2004 and have a '5' in the 10th digit in the vin number.
The reason I ask is that SDD only works on cars that are 05 model year or newer.
For an 04 model year (2003 built) car you need to use the older IDS software.

In addition I am not sure that the latest updated edition of SDD that the Jaguar dealers use will work with the S-type?
I think the the last version that did work fully was version 138? But I may be wrong.

Anyway this does not matter, the number of flashes of the PATS light is what you need first.

Mellow

 

My SDD will drop back to IDS if the car is too old for SDD. I currently have V163.xxx
I thought all versions of SDD will do this?
It surprised me the first time as I hooked up a 2004 XJ and the software said wait a minute while I load IDS.
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