Gus,

AFAIK They went over to the single returnless pump MY2003

 

No, that is wrong. 4.2 only have one pump.

 

Well back to square one. New ECM did not do the trick. Once again checked all wiring and there is nothing wrong with it.
The sensors are not that important. The car will still run even if you disconnect fuel pressure/temperature sensors.

SOMETHING is telling the ECM to shut down pump, but what it is I can not figure out...

Fuel gauge is ok and even if it would fail that would not shut down the engine. The XKR 4.2 only have one pump.

 

Have you tested the wiring from the fuel pump module to the fuel pump drive circuit for open circuit, short circuit or high resistance.

Just one possibility with the code you have.

 

Starting to sound like a security problem
If the key is turned to the ignition Run position, the instrument cluster will start the CAN
data exchange and start transmitting the idle status. If the key status is valid, and the
subsequent challenge / response is verified by the ECM, the ECM will allow the engine to
start. Otherwise, starting of the engine is disabled. The ECM controls the following outputs:
starter relay, fuel injectors, ignition coils and fuel pump.
BUT you said the engine would start with the pump jumped.
I don't know what else would cause this. I'll ask for some expert advice.

 

I found out that on pin 92 on the BPM there is a signal via inertia switch that is called "OK TO FUEL". I have tested it and I have 12V there. If this is correct I dont know!

I have also recoded all keys and transponders. SOMETHING is telling the damn thing to shut off pump, but what?!

 

If there's a security problem the ECM will log DTC P1260

Your pin 92 OK to fuel is an encoded signal from the key transponder to the BPM
The BPM then tells the ECM that all's well.
I doubt it would be 12V but I don't know.
If the key transponder isn't sending an OK to fuel then that could be your problem

 

The line you refer to is a serial and encoded data line from the key transponder module. I may be wrong, but I wouldn't have thought you would have 12v on that line.

Suggest you look at the key transponder module next.

 

Jim, see my comment above

 

Sorry Steve, beat me to it and with more info.

 

Actually I misread the post - OP did say BPM + I thought he'd said ECM; Doh!
As I read it the engine will still crank without the 'OK to fuel signal'.
Here's an interesting thread
https://www.jaguarforums.com/forum/x...er-inop-70029/

 

I was talking about the pin 92 on the BPM. I supose that signal has to be correct to BMP who will then pass it on to transponder module and then on to ECM. Question is still if there should be 12V on Pin 92/BPM or not.

When I crank the engine with car connected to IDS/VCM the fulepump module sends 75% with ignition on and that means "turn off". All is well so far. When I then crank the engine it sends 50%, and if that is correct I´m not sure off. Tride on another XKR and it send 16% when cranking...

 

Read the thread about the transponder module - try the window open test.
Try another key.
With IDS I'd think you could extract some security info.
The KTM signals the BPM which in turn tells the ECM to turn on the pump.

 

Ok, so lets try the key transponder module.....but I can not locate it! It supposed to be front left somewhere around the intertia switch but I don´t find it. Anyone knows?!

 

Location is in the thread I posted

 

Found it. Not a very friendly position.....and I really don´t know what to do with it if I´m honest. Absolutely no more ideas on what to do now.

 

Try the key test, another key and hope someone who knows IDS comes along - see Bob's first post in that thread..
AFAIK if it was the exciter ring or power to the KTM you would't crank.

 

Well this is not the same problem at all. My engine cranks. I also have spark. All 3 keys can be used for arming/disarming the car. The abolutely only thing that is not working on my car is engaging of the fuel pump. I also swaaped the ECU and coded the keys/transponders without any problem...

From what I can see there is no relay in this configuration to anything concerning the fuelpump. Relays are only for ignition - yes?

Only thing now I can think of is the BPM, but it feels very unlikely.

Fuses I have checked and from what I can see no problems. Anyone hve the manual and can have a look exactly what fuses could be involved in this?
I could change them just in case anyway to eliminate them as a problem.

 

Descrition from JTIS: I have 75% on the FPDM....

"FUEL PUMP MODULE MONITOR: PWM, 1 Hz, 50% POSITIVE DUTY CYCLE = NORMAL, 25% POSITIVE DUTY CYCLE = NO CONTROL SIGNAL, 75% POSITIVE DUTY CYCLE = FUEL PUMP INOPERATIVE"

 

The electrical diagrams are in JTIS, 4th icon from the left on top of the screen. Fuse numbers are in there.