I'm sure this has been answered somewhere in this forum, but I'll ask here. I was re-flashing my 2004 xjr (X350) using Mongoose Pro (not a clone), and SDD v131.02, when the battery voltage dropped a little, now the car won't start. The SDD does not recognize the VIN and cannot communicate with the ECM. Is there a "simple" fix for this, or do I have to bite the bullet and visit the dealer? Any help is appreciated.


Thanks

 

https://www.jaguarforums.com/forum/x...ng-ecu-139181/

Read this thread.

 

Thanks, I'll read it. Another question is, do I try to re-flash as existing or new ECM?

 

Often repeated, but didn't you do the reflash with a stabilised voltage power supply?

 

I didn't, That's how I ended up in this situation. Now that that's established. Any solutions on how to recover from my error?

 

In one of the posts in that thread someone who apparently bricked the ECM used SDD to reflash something else, I forgot what right now, and it worked for him.

You really need a battery support system as Paydase mentions.

LOTS of horror stories with people not doing that when reflashing.

This is it.

"Re-configured the 'Generic Electronic Module' as 'SDD' called it and everything is back to where it was". Post #10

May or may not help you.

 

Thanks, I'm searching for a "battery support system" as we speak. Any suggestion? Will an ordinary battery charger work?

 

I do not think so. Others will have to chime in here.

 

NO!
You need a specific "stabilised" power supply, with a voltage that can be set at about 13.6 Volts.
A standard battery charger, even more the intelligent battery chargers, vary the voltage during the charging cycle, so this does not fit.
There are cheap chinese stabilised power supplies for 50-100 USD on ebay that can do the job in principle, Jaguar recommends a much more expensive (ca. 400 USD) quality device capable of 60 amps, you need at least 30 amps but better take a 50 amps.
Look for threads on the issue, there are many

 

Thanks Paydase, do you recommend a specific brand/model?

 

As you're in the US, you can have these ones, very good and cheaper than the Jag reommended one:
http://www.iotaengineering.com/pplib...duct_Guide.pdf

 

astron power supply ss-50. 13.8vdc 50a.

 

Yep, even better if you keep it in your garage (25 kgs...)
Probably many of them, used, can be found in the US.
I was lucky to source a used VS-50 in Belgium

 

I had a key programmed last week. Brutal had a large roll around power supply. It was big and heavy.
It looked more like a battery charger. I have used regulated supplies at work for years. This definately looked more like a charger.
Worked great, key was programmed in 20 minutes or so.
He is a Master Tech, if a charger would not be stable he would not use it.

 

I won't speak for Brutal as the man knows what he's doing but this is JLR's position

 

Thanks for the TSB, I"ll check around and price one

 

Thanks, I think I saw one of these at the pawn shop the other day. I check again tomorrow to see if it's still available and the price. You guys are a wealth of info and knowledge.

 

Hey guys, I'll find and purchase one of these and report back after I've tried it. Thanks for all of your very good input.

 

Have any idea what kind Brutal used?

 

I got this one and it has worked good the couple of times I have had to use it. They also make a 50 amp version as well. In retrospect I should have gotten the 50 as it does, in my opinion, push the limits of the 30 amp. This is on my 2004 VDP

MFJ-4230MV 30 amp variable switching power supply 0 - 13.8vdc