Hi, I have a 2006 S type which started showing random rear light faults, I traced it to faulty Rear Electronic Module.
I sourced a secondhand unit from a breakers, fitted it and rear lights all perfect. BUT the car would not start. I believe this is because the REM controls the fuel pump and was not programmed to my car.
Does anyone know someone with a mongoose or similar who could reprogram the module to match my old one?
Thanks in advance, Max

 

It may be part of thee immobiliser. Probably IDS/SDD can redo it.

 

Working from potentially faulty memory, but I think other forum members have replaced an RECM without the need for any reprogramming. The catch, however, was the entire part number must match, down to the last digit.

Did your numbers match? If so, by chance did your car sit idle for an extended period? The fuel pump is prone to seizing if it sits too long. If your RECM numbers matched, or maybe even if close, it might be worthwhile to run some basic troubleshooting steps, such as checking power to the pump. Might save you some grief and money.

 

Thanks for that, I know there is nothing wrong with the fuel pump because upon putting the original module back the car runs fine.
Yes the part numbers on the modules match exactly, even the serial numbers are not very far apart.
One thing I suspect may be different is that the new module is probably from a diesel (seeing as 95% of S types sold after 2005 were probably diesels) whereas my car is a petrol. Of course this means there is very little chance of getting a recovered petrol REM，hence why I'm hoping reprogramming might solve the problem?

 

More like 50%.

Overall, about 10% of S-Types were diesels (about 31,000).

 

Several thoughts on the matter:

1) Both engines may have used the same RECM programming. But perhaps the new RECM is also defective, just in a different manner than the first. Your original suffered from Wonky Light Syndrome. Maybe the replacement has Fuel-Pump-Itis.

2) If the programming is different per engine type, eBay is your friend. You can search for an RECM from your exact model.

Consider the math, too. If you can find a local specialist, they might want $200 (strictly a guess) for reprogramming. Might be worth gambling $50 (another guess) on one from eBay.

 

Sorry, I was referring just to the UK, where sales of all S types to 2003 (when they were all petrol) were around 42,000. Then for 2004-2008 (after the diesel was launched) they were around 1600 petrol, 13000 diesel i.e. well over 90%. So late model petrol S types are as rare as hen's teeth in the UK (particularly after 2006, when they fell into a punitive road tax band).

 

I don't think I've seen that specific (UK only) break down.

Bear in mind this forum has hardly any diesel owners.

 

I follow both this forum and "jaguarforum.com"; there are a few of us who do. People on the "other" Jaguar forum often refer to this as the American Jaguar Forum... The lack of diesel content may be one factor in the distinction.

I will say this, however, if you are looking for lots of discussion on diesel related issues, the "UK" Jaguar forum, or "jaguarforum.com" is the place to go...