Hi all
I have a 97 xk8 convertible with a LJA1410AH ecu that had the capacitors leak on the board and damaged the tracing as well,
I am looking for another unit if any one has one
I did find a LJA1410Ak and installed it and car fired right up no problem, i would still like to find a LJA1410AH to have the right one.
I have looked everywhere to try and find out what the difference is between a LJA1410AH and a LJA1410Ak or LJA1410AN wondering if anyone knows or could point me in the right direction
Or if anyone has a an AH unit collecting dust lol

Cheers all great forum

 

Hi Dave,
Neither Heritage nor the parts catalogue have reference to any of those part numbers. I suspect they (AH, AK, AN) just represent minor progressions/modifications.

If you've got a working one I'd stick with it - although I'd replace all the capacitors in it as preventative maintenance.
It might be worth letting an old-skool tv/radio repair man take a look at the damaged one - it may be recoverable and the '97 modules are getting scarce.

 

Yes I already did on the AK unit, I am going to attempt to repair the board, since I intend on keeping this car I wanted to find another unit as a backup lol if I am not successful
I found this car it cas been sitting for 10 years I picked it up from the original owner, it quit on him and he tried a couple of shops 10 years ago who couldn't fix it( im guessing they were not very good) so he parked it and never got back to it. I cleaned it up changed the gas and fluids, I knew about the ecu issues in these cars plugged in my scanner no communication and knew, pulled the ecu, put the one I found and she fired right up. So got a low mileage xk8 for 3k Canadian.

 

Hello,
Doesn't the ECU need to be programmed? Does it just work by replacing it (with the same part number)?

Best regards, Willi

 

It did not need programing I just put it in

 

Am I right in thinking those early cars don't have an immobiliser with the chip in the key?

 

That is correct my car is north American no immobilizer in the key

 

97 US cars didn't have a chip in the key so plug & play. 97 ROW did so will/may need IMMO SETUP

98-2002 everywhere need IMMO SETUP, although some have reported plug & play.

MY2003 (4.2L) is rather more complicated. See attached

Dave, motorcarman kindly sent me this explanation for the very early cars:

"Many modules were replaced by Jaguar until the engineers figured a way to include the configuration software and a procedure to 'reflash' the existing modules for updates etc.

SOME modules can be configured after it leaves the manufacturer and some are just 'LOCKED' as is and must be replaced if something is changed.

That is my thinking on the logic of why some can be reconfigured and some just need replacement. (PROMS vs EPROMS?)"

This may explain why there were so many seemingly undocumented ECM part # variations for that year?

 

That makes sense my car is a very early car vin number is in low 5000 at the end with a manufactured date Oct 96, I may do an experiment the car being so early I may put in one of the LNC1410BB UNITS from a 98 and see what it does I think your right the early cars are generic

 

It might be possible to persuade it to run, but there are several differences that prevent its being a replacement (see attached)

97 almost, although see the attached re EGR delete.

 

This is perfect thankyou this is what I needed my car is a non egr car so everything up to the LJA1410AH to CA will function in the car after that it has the immobilizer, if I have the right exhaust cam shafts. Makes me think if down the road I needed to change to the 98 ones changing the body, security, dash cluster, key locks and misc modules from a wrecked donor car that would work as well.
just thinking in the future when these cars even become more rare