Hello everyone
thanks for the input
Well I have tried multiple scanners today
from friends
Ok
Have checked all Fuses and relays they all good
I have got the same results from different scanners
here gos

ENGINE CONTROL MODULE
no link failed to communicate

GENERAL CONTROL MODULE
no link failed to communicate

REAR CONTROL MODULE
no link failed to communicate

TRANSMISSION CONTROL MODULE
p1797 can transmission control unit to engine control unit Malfunction

INSTRUMENT PACK
u2522 can message timeout from transmission control unit
U2523 can message timeout to engine control unit

ABS
B2141 non volatile memory configuration failure

Re tested my two batteries one purchased in June one yesterday
with my quicklyinks battery tester
Result
State of health 98% & 100%
Charge 100%

Left car battery disconnected over night
still made no difference

Hopefully tomorrow i can get engine control module out
Then try to test to see if its getting power

Thanking you
Darrol

 

I googled a bit around - maybe this helps - it's a collection of various suggestions:

A physical fault, such as a damaged ground cable connected to an engine mount bracket after an impact like hitting a pothole, can disrupt the CAN bus and cause multiple modules (e.g., ABS, PCM, TCM, gear shift module, power steering) to lose communication.

For instance, a scan on an I-PACE revealed widespread communication faults across the PCM, ABS, RCM, BBM, BECM, and Gateway Module, indicating a network-wide problem. In some cases, the issue might be software-related, such as a control module calibration failure or an invalid configuration, which may require reprogramming or reconfiguration using the manufacturer's approved diagnostic system.

The battery terminals may be dirty. / Check battery cables and ground cables.

The communication to the ECM would be through the diagnostics port, by your left knee. This port is powered, and protected by a fuse. You can check on this fuse yourself.

ECU Problem solvedHello; Solved my ECU problem. I called Foreign Auto Computer (800-241-6689) asked if they had a remanufactured one in stock. Which they did. So I shipped mine down to them. They transferred the info for my car to the new unit and sent it back. I plugged it in and car runs great. Comes with a 5 year warranty. $275 for my car plus two day shipping $50. Return shipping is included in price. They received my unit on Fri morning and I had new unit back at noon on Mon. Excellent people to deal with. You can look them up on Ebay (facr_inc) or their web page just type in Foreign Auto Computer Inc. Their web page lists ECU numbers for many brands and models. I believe it was less expensive to do than any dealer. The new unit corrected a couple of problems I had with restarting engine after driving it.
Address: 176 Private Rd, Hawkins, TX 75765.

Did you check that none of the many pins on the car's PBDII connector are bent?

A critical step in diagnosing this issue is to verify the integrity of the CAN bus wiring. The resistance between the CAN High (pin 6) and CAN Low (pin 14) on the OBD2 connector should be approximately 60 ohms.If the measured resistance is significantly higher, such as 110 or 112 ohms, it suggests an open circuit or a problem with the network termination.This can be caused by a faulty or damaged wiring harness, a loose connection, or a problem with the J-gate shifter, which has been identified as a common culprit for such communication faults.

 

look at the wiring diagram and figure it out. someone probably popped a couple fuses

 

if you have the owners manual or the electrical diagram look for can related fuses. Xalty idea is good

 

Wiring (Electrical Guide) is on JagRepair.com - Jaguar Repair Information Resource

(Also lots of detail in the workshop manual.)