Hello everybody.
My name is Jorge from Portugal and I've a XJ 3.0D. After an accident, the engine never started again.
The diagnostic software detect this failures:PCM (Powertrain Control Module) (2 DTC)
TCM (Transmission Control Module) ( 1 DTC )
What can I do, to resolve this failure?
Many thanks

Jorge

 

What scanner are you using?
Were the air bags deployed?
There is a SRS module that stores "Crash Events" depending on how severe the crash was. Generally the module must be replaced if it can't be cleared and re-programmed. The concept of clearing crash data also comes up as it's an entire system so not just the SRS module is involved.
Also the seat belts have an explosive pretensioner that go off during a crash and need to be replaced/repaired.

I don't see any of these types of codes so not sure if they are not being read by your scanner or if they are even there.
I am afraid without using the Jaguar SDD system we don't know what the car thinks is wrong.
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Adding what Clubairth1 wrote; The engine is only possible to start when gear is in neutral or park position and brake pedal pressed.
Because you have error of gear indication circuit: I would check the wiring of transmission and gear selector.
For brake pedal test: When you press a brake pedal your brake lights shoult lid, even no ignition is On.
If any of your airback have went off, you need to replace SRS module (and airbacks what have been launched), like Clubairth1 wrote.