Annoying S-type problem, any ideas?

[il-mostro]

Hi everyone. I am posting this thread to see if anyone else has had a similar problem with their S-type Jaguar, and any possible solutions.

My father owns a '99 S-type 3.0 Exec out in Spain, bought 2nd hand a few months ago. The car runs fine, except for a very annoying fault with the locking system.
If the vehicle has been driven, parked up and then locked with the fob, you are only able to re-open the car with the fob for about 20 minutes afterwards. If you wait any longer than this, you can only open the car with the actual key. As soon as you then open the door having unlocked with the key, it sets the alarm off. I understand there should be between a 7-20 second delay between opening the door and the alarm going, but this isn't the case with his car, it goes off straight away!
The car has had new Key Fobs, has been into Jaguar numerous times in Spain, and no-one can work the problem out.
Has anyone had a similar problem to this, or can throw some light on how to rectify the problem?

There has also been problems with the two electric from seats, sometimes failing to move to their last position when the ignition is started, although this isn't as bigger problem as the alarm. Could this all be tied in together somehow?

Hope someone can make sense of this, as it is driving my father (and his neighbours) mad.

Regards

Mark

[melhook]

I know its in Spain, but any signs of water ingress to the boot ??

[Brink]

This sounds like a problem with the CAN shut-down protocol, usually handled by the dash ECU. After 20 minutes all ECUs are shutting down, including the fob receiver in the car. It may be that an ECU somewhere has an active fault, which is causing the dash ECU to act strangely and shut down the receiver after 20 minutes of waiting. Normal certain circuits are allowed to remain active.

The fault could be that the receiver is using to much current, so the dash kills it after 20 minutes to stop the battery discharging.

[il-mostro]

Hi Melhook

No signs of any water ingress, and as you said about it being in Spain, hasn't really been treated to much rain...

Thanks for the posting.

Hello Brink

If the suggestion you made was found to be the case, what would be the best way of fixing this issue? My father is 'building' a relationship with his local Jaguar dealer, so any suggestions would be welcome. Thanks for the posting too.

Mark

[GavinPearson]

S-Type from 99 is not on CAN, but SCP.

As the car isn't working after 20 minutes, this means that the electrical system has powered down waiting to be re-energised upon remote keyless entry activation. It isn't getting that signal. So the dealer needs to look for the signal. Get that and you will be rid of the problem.

[il-mostro]

To 'Gavin Pearson'

Thanks for the posting. Does what your saying point back towards a problem with the fob, and it not sending the correct kind of message after the 20 minute period? What is the 'SCP' you mentioned in the text?

Thanks for the great help.

Mark

[Brink]

Ahhh yes - Ford SCP.

SCP is the BUS type - the means by which ECU's talk to each other in the same car.

SCP is specific to Ford and Co. (Jag is part of Ford)

I'd forgotten about that damn thing! I must have blocked it from my memory...

Edited by Brink on Saturday 15th September 08:50

[Brink]

I would say it is NOT the fob.

The problem is likely to be in the car, related somehow to the receiver. In order to open the car the receiver must not be completely shut down, but in low current mode, waiting.






Let me think on it some more...

[il-mostro]

I do not use this forum much, although i have been a member for ages. What a helpful bunch of people you all are!!!

I won't lie, some (most) of what your saying is gobble-de-gook to me, be if i can pass this info on to Jag in Spain, hopefully someone there will have half a clue and we'll be able to sort this out!

Thanks again for all the posts.

Mark

[cptsideways]

A ford dealer might be able to assist too? or a friendly RAC man on hols if you know one

[il-mostro]

I somehow doubt i'll get the RAC, or AA for that matter to come over to Spain! Home call out might be a little stretched me thinks!!!

[GavinPearson]

il-mostro said:

To 'Gavin Pearson'

Thanks for the posting. Does what your saying point back towards a problem with the fob, and it not sending the correct kind of message after the 20 minute period? What is the 'SCP' you mentioned in the text?

Thanks for the great help.

Mark

The fobs are clearly fine because their signal is being received and acted upon at the 0 minute point, then all the way up until 20 minutes.

BUT the unit that is in the car and receives the signal is the root of where the problem is.

That unit needs to be diagnosed to find out what is going on when it puts the rest of the car to sleep - because it is putting itself to sleep as well. That would explain why you have to use the key, which then activates the alarm and wakes the module up again.

[Jasper Gilder]

I had this on an S type - I think it was eventually tracked down to a broken wire or bad connection in th edrivers door module.

[il-mostro]

Hello to all who replied to this thread. The information on this thread was given to Jaguar in Spain who have made progress with fixing the problems. The alarm is no longer sounding, and the key fob locks and unlocks the doors on damand. They have also made progress with the electric seats. They are working again but the memory functions are still not working. A part from the UK is currently on order which should, fingers crossed, resolve this.

I will always maintain that these sites are worth their weight in gold, because if you don´t know what the problem is, there is a good chance that someone else will.

Jaguar in Murcia have been very helpful, and i would recommend them to anyone in that part of the world to pay them a visit if they have any Jaguar problems, whether a new car or slightly older one like my fathers.