I am as Jaguar Owner (XF Sportsbrake,X250, 2015, 3lV6 Diesel) and used to to maintain and repair my cars (mostly Mercedes until now) and motorbikes by myself but very experienced in electronics until now - this Jaguar forced me to do that.
After battery disconnecting (had to replace the starter , installing a new timing belt and climate pipe) the car had many faults.
I made it to reprogram a non functional key and get all modules communicating with SDD/Mongoose but the car still not cranks.
Both keys are functional, the car locks (the rear right passenger door latch seems not working) and unlocks, also ignition gets on without any error messages in the instrument screen, but no crank.
SDD shows failed QCCM (Quiescent Current Control Module) test and zero Keys programed to ICCM (Instrument Cluster Control Module), also SDD does not find the Television Module, Navigation System and DAB Radio Modul whereas icarsoft device finds these and can read all numbers ( QCCM issue ?). So Sam for some help about that: Are all these failure related to " no crank" or just one ? How can i get the keys programmed to the Instrument Cluster Module ( remove both and install new ?). Where is the QCCM located ( part of Rear Junction box or Gateway Module or both, something else) ?

 

I'm no help on the electronics, sorry. There are some good threads in this forum addressing these issues so search around. Many people have troubles after disconnecting the battery.

When I first got my XF I could not get it to crank over or start either. Found the problem to be I was not pushing hard enough on the brake pedal. On my Subaru it takes very little effort but the Jag needs a solid push.

Hope that helps.

 

So did you not get any functioning keys when you bought the car?

 

Thanks for your reply. Brake pedal is not the problem. Pressure and pressure switch is ok. I had decided to send the RJB, ECM and the GWM for a check and if needed for repair to an electronics company, even if the SDD says that this modules are ok.

 

Thanks for your reply, both keys are functional, tested and also reprogrammed via SDD. I guess the problem is a non functional module even if SDD says all are OK.
My guess is the ECM and/or the RJB. I sendet both and the GWM for check and repair if needed to an electronics company.