Hello everyone,

My Jaguar S-Type R has suddenly become immobile. The vehicle is unable to establish communication with the transmission. During diagnostic inspection at the service center, it was identified that the vehicle’s ECU carries a different VIN compared to the rest of the electronic control modules.

When the IDS system connects using the last six digits of the VIN (M67543), it fails to communicate with the ECU and the transmission, while it successfully communicates with most of the other modules. Conversely, when connecting using the alternate VIN (M55737), communication is established with the ECU and transmission, but not with the remaining modules.

I would appreciate any guidance on how this issue might be resolved.

To clarify, the engine starts normally; however, the transmission remains non-functional, even when attempting to operate it in manual mode.

Thank you in advance,
Mike

 

Cross-check with the physical VIN badges - which if either is being reported correctly?

If one is, you may need to reprogram the others but I suppose first make sure it's not some sort of weird power/battery problem (though I doubt it is).

Never heard of this before - lucky you?

 

Mike, I have to ask the obvious . . . despite reading "suddenly" . . .
You haven't changed the ECU and now struggling with the mis-match?
Not to be "smarty-pants" or obtuse, but some OPs hold back embarrassing info.
What we have not seen, as John says, is such a bizarre and "unprovoked" fault.

They pulled two VIN trying to talk to ECU, but were both used to see what codes were pulled?
If so, what were those codes for each VIN?

Cheers and best wishes,

 

While the original BIN is M67543, when you tell it to read the car, it reads it as M55737, so it does not communicate with the other systems, while when you give it the original VIN it reads everything else except the engine. I bought it second hand, without knowing if the previous owner has made any changes to the engine computer. Is there any way to marry the two VINs?

 

Check the VIN badges - what is the correct one?

In theory yes can reprogram using IDS. Not trivial and not cheap as you WILL need a hefty power supply for it.

 

Hi
All the modules are linked via can bus, if you lose the loop any where the modules wont talk together and you get lots of problems
and most of the time wont start, for example unplug the abs module and the car wont start, link out the 4 connection on the connector for canbus and it will start ( linking out the connector just bypassing the wiring on the module you have just unplugged just continue the loop. cant be done on ecu. tcu and dash)
go on JagRepair.com - Jaguar Repair Information Resource and download the electrical manuals for your car free, at the end of the wiring diagrams are all the can bus loops, disconnect each module and check the wiring is ok
its very common for the wiring harness to get damaged behind the front wings and where it goes over the front bumper impact foam blocks and brackets, behind the front bumper.
a couple of hours of unplugging modules, check wiring continuity and bridging each module connector and you will find it.
cheers
Joe

 

Hello Mike,

Can you please elaborate on the timeline of the problem? I'm curious if the car had been behaving normally until recently, even with the mismatched VIN programming. If so, that would point towards a problem not related to the mismatch.

I'm not well versed with the system, but thought it all had to match. Or did this new problem ("suddenly become immobile") occur immediately after a module was replaced or reprogrammed?