Jaguar xf 2.2 td 2012...can somebody please tell me we're the fuel inertial switch is(engine cut of & "how t o reset it") off the road for 3weeks now..

Question edited for clarity and toss in some CAPS.
Question moved to model category.

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ECONOLINE OR CLUB WAGON.?
99% OF ALL POSTS HERE IS OWNER FAILS TO SCAN THE PCM.
AND GOES BROKE GUESSING ENDLESSLY.
21 YEARS OLD ,TROUBLE IS 100% EXPECTED, EVEN 2 O PROBLEMS !!!
ALL FUSES GOOD. F.1.17 MUST BE GOOD OR PUMP IS DEAD
WARNING THIS FORD HAS AN INERTIAL FUEL CUT OFF SWITCH AND TRIPPED NO POWER GETS TO THE PUMP.

there are 50 causes of cranks but will not start or starts and stalls
and up to 20 tests and 20 tools used to find the cause.
a real shop has all those tools and skills. be hard to tell you them all in this tiny text box.
no engine told and is the topic here. 4.2,4.6,5.4l??????????????
I TOSS COIN LAND 4.2L, I MUST GUESS.?
will run how long on fluid, 3 seconds , 10seconds, 10minutes or one long trip?
???? GUESS 3 SECONDS AS TEST FUEL IS EXPENDED FAST.


the PCM controls fuel (EFI it is)
and the PCM will cut fuel if it wants to for many reasons. 5 or less.
what you failed to do is check fuel pressure to spec.
cranking fuel pressure.
if too low PSI or dead we check pump cranking voltage next. 2 man test.
it will be 11vdc at least cranking if low
we check voltage out of k4 fuel pump relay, if good there wires from here to pump are bad.
if bad here, all pins of K4 are checked for voltage, for sure F-1.17
for sure coil of K4 is hot 12vdc once side and zero on other side of k4 coil
if 12vdc missing there that is power loss from k163 pcm relay
if low side of k4 coil is stuck 12vdc that means the PCM is CUTTING FUEL ON PURPOSE. told below. (why not scan the PCM and see why it does?0
all tests are cranking tests, 2 mean tests. 1 at key , 2nd meter in hand
DMM set to volts.


causes, of dead fuel pressure, cranking, not just the pump,.
1: PCM FAILING FOR IMMO LAMP GLOWING AND IGNORED,
2: PCM SEES BAD SPARK (DETECTED SO) EVEN IF IT SEEMS OK.
3:PCM SEES CMP/CKP ERRORS. , NOT USING A SCAN TOOL HERE MEANS YOU WILL NEVER FIND OUT WHY IT CUT FUEL.
3: TPS SENSOR STUCK HIGH, IS WOT CUT FUEL MODE TO SUPER SECRET UNFLOOD MODE. TPS GROUND CUT , TOP CAUSE.
4: INERTIAL TRIP SWITCH


NO ENGINE TOLD E150
there are lots of other causes, above is fuel cut.
IMMO key failing
MAF DEAD.
EGR VALVE STUCK WIDE OPEN
ENGINE COMPRESSION TEST FAILING
MELTED CATS BLOCKING EXH ,PATH.


MY GUESS IS.
CHECK ALL FUSES
CHECK INERTIAL SWITCH
SCAN THE PCM


I BET FUEL PRESSURE IS ZERO, CRANKED

Question edited for clarity, MAKER.
Question moved to Jaguar XF.

There is a lot going on back there. It appears to have a rear body control module. You need an auto-electrician with a pro grade scan tool computer to look for issues or computer network connectibility with the module.

https://www.google.com/search?q=2012+Jaguar+XF.+trunk+control+module

..

please visit a trasmission shop for a complete diagnost

Switch off engine and it will reset as mine has done. Also my XF, got stuck in park and would not move with engine on. Remembered what I did with my first car ( Austin seven ruby) and got out and rocked the car front and back and the control knob just popped up. Am in Spain with my XF so am still worried about the sticking of the control knob problem.Have to get home at end of the month to UK and will wait until my return before contacting the [email protected]

Some cars, like ford and Jaguar have an inertial fuel pump cut off. I don't think Saab has one, but relies on the alternator instead. The fuel pump relay is only energized for a few seconds, unless the alternator has output. So a bad alternator will cut out the fuel pump relay. This is the way all Bosch fuel injected cars work.

You can tell how to put a jumper across the relay primary by looking at the diagram on the side of the relay. But your problem is probably the fuel pump safety cut off. It is different on different cars, and I don't know where it is on a Saab. But I can tell you some cars use an oil pressure switch for this, and you can tell because it will have more than 1 wire then. Some cars like VW use the alternator, and a bad alternator will do it. Others, like Jaguar, use an inertial switch. It can be behind a kick panel, in the engine compartment, or even in the trunk on Ford.
The idea is you want the fuel pump to cut off in an accident.

Jaguar has an inertial sensing fuel pump cut off relay. It is supposed to be behind one of the panels next to your feet, in the front seat. It has a rod that sticks out, that has to be depressed back in. But sometimes there is also a complex procedure you have to do with the ignition switch as well. The dealer will give you the details for free if you call them.