Greetings,

Reaching out to get guidance on multiple issues. My car is a 2005 XJR currently with 95K miles on the odometer. Purchased in 2015 with 80K. So far, I consider my ownership experience as 50%/50%.

Love the styling. The looks of these cars embarrass many current autos. Not a clone

Interior styling is a beautiful combination of wood and leather.

The performance is surprisingly good. 390 HP in an 18’ sedan is solid. It rocks 30mph to 120mph.

However, there are aspects of this Jaguar that just suck.

Stereo is terrible.

Nav & touchscreen is beyond a joke. The upgrade solutions are difficult.

The headliner and sun visor fabric is coming down.

The sunroof track is broken.

The rear sunshade is stuck open.

No driver heat. Heater core blocked.

Replaced the air suspension with Arnott coil overs. Air shock blew, made the change, my choice.

Replaced front suspension components.

Replaced rear suspension components.

Replaced all cooling hoses. Valley hose sprung a leak, decided to preventively replace aged rubber.

Purchased ICarSoft V2.0 OBD reader. Not sure if this was a good idea. Doesn’t seem to read TCM.

Here is the issue I need help with. My partner was driving the Jag and she said it started to sound funny. So, she turned the car off at a light, hoping to restart and all would be well. Could not get it started back up. She had it towed to our driveway and here it sits.

When I turn the key, the dash lights up, radio works but zero start. No starter clicking, no turnover, nothing. Dash message says: Restricted Performance and Transmission fault. Jumped into our forum, the Euro Jag forum, fired up the Google found a zillion possibilities. Looking for some guidance on a systematic trouble shooting approach.

Reading through solutions a faulty battery came up frequently as a simple solution. I replaced the battery once in 3 years so that’s a possibility. Took the current battery to O’Rileys for a check. It read 12.5v, I asked them to charge it up as much as they could. Reinstalled, nothing. OK, so 3-year-old battery may need replacing, bought a new AGM battery (I am finding this may not have been the best choice). Installed new battery, nothing.

Bought an ICarSoft V2.0 OBD reader, (I can still return this if you recommend something better). I scanned the car and must have gotten 50 codes. Read further on the forum and the interweb and decided to do an electrical reset and clear as many codes as I could. The rational here is that the car may have never been reset, I could clear old codes and if new ones persisted the car would continue to throw current fault codes. I disconnected the black, positive, ground from the battery and touched it with the red, negative battery terminal, being extremely careful not to touch POS to NEG, we all know this. Left it together for half hour, had other stuff to do, reconnected the battery. The same dash message appeared, restricted performance, transmission fault, no start.

Looking for a systematic approach to solve these issues. Suggestions? Common sense says to scan the car again, pick up the fault codes and try and decifer whats going on. I don't really know what I'm doing so I am going to impose on the forum to help.

Thanks much,

Cheers,

Griff

 

Sorry to hear. I had a similar scare once. Check the ECU connection under the cabin filter. Make sure the connection is tight and inspect for water leaks/damage.

 

You could check the ground studs behind the headlights. They deteriorate with age.

Or maybe the starter has gone bad?

 

The ground studs behind the headlights can cause all sorts of issues. When one of mine failed the engine would cut out if I used the wipers. Clean solid contact and it’s back to normal.

 

After the reset, how many codes do you have? You should post the list here, someone might recognize a particular combination.

The electrical schematics for the X350 are floating around on the web. One approach would to be go code by code identifying the systems impacted / underlying each code. For example, P2135 (I don't know if you have this code) is a throttle body position sensor code, so this code encompasses: (a) the TPS, (b) the ECU connector, and (c) the ECU. Do that excise for each code, and then look to see if there is a common component.

Skipping that work for a moment, to generate that many codes my gut is the ECU harness and/or ECU would be involved. You could try cleaning the ECU connector with electrical contact cleaner. You need to remove the (a) wiper blades, (b) windshield lower cowling, (c) cabin air filter box and air filter to get access to the ECU connector. You will need a 5-point security bit to remove the center bolt of the ECU connector - these seem to be available only online, as the auto parts stores (at least in my experience) carry 6-point torx security bits but not the 5-point ones.

Good luck with it, keep us posted.

 

Have you tried to start in (N)eutral?

 

I can't help you troubleshoot your issue, but when you get it running again get a bluetooth module that plugs into the 12v cigar plug. Streaming music makes the Alpine system come alive. It doesn't compare with normal FM. CDs sound good as well. Also, turn the DSP to 'front' so you get all the bass. Also, go into the stereo settings and turn the subwoofer to full. This should help.

 

Hey guys!
Actually the XJR was the best car I ever owned. Lets not forget how old they are now. Maintenance is ever more important.
But to your issue. I went through that once. In my case the modules in the boot were ‘bumped’ by my returning the spare tire to the compartment. As a result, she wouldn’t start due to a loose module... Of course the codes gave me the hint of the issue.
Incidentally, I’m from the camp that prefers to connect nothing to the ODBII port unless I’m performing maintenance.

Not intending to sound derogatory... but if you don’t have the learned skills to manage this situation you may cause more harm than good... or spend more time and money than its worth. (by arbitrarily replacing unnecessary parts). I’m sure there’s a retired jag mechanic available... ask the guys at the dealer?? or the local Jag club??

Cheers All.

 

This is just a guess... All things point to a loss of comm with the TCM. Your messages say there is a fault with TCM - your iCarsoft will not talk to the TCM - car won't start because it cannot talk to the TCM. Check the TCM connector on the transmission. It may be leaking and full of fluid shorting out the CAN Bus. There may also be shorts internally in the TCM. OR IT MAY BE SOMETHING ELSE ALL TOGETHER!

 

Good Afternoon,
I wanted to thank everyone that took the time to respond here. I was called out of country for work shortly after posting this and was unable to follow up until now.

I will check each of these suggestions and let you know how they worked out. Guy, I agree with you, not negative at all. I am looking for some assistance locally. If anyone has a contact please let me know or forward my info to them.

The weird thing is, even with communication issues, wouldn't the car at least turn over?

Talk soon,
Griff

 

There is no direct key to starter connection. It is the various computers that have to agree to let the starter run. Lack of comm prevents all of the handshaking taking place.

 

Understood, the hunt is on!
Griff

 

I have written down the initial codes that I pulled when first scanned with the ICarSoft as has been suggested, just to be safe. i tried to look up each code but not 100% sure the descriptions are accurate. A few codes I could not find and no TCM codes. Any ideas?
Thanks,
Griff

ECM Engine Control module

B1685 Lamp Dome Input Circuit Failure

B1643 Mirror Passenger Right Circuit Failure

B1582 Vehicle Speed Sensor (VSS) Out of Self-Test Range

B1672 Seat Driver Occupied Input Circuit Failure

C1396 ?

C1316 Changeover Solenoid Malfunction SMC2

C3216 ?

C2053 ?

U1134 Invalid or missing data for ignition switch

P0560 System voltage malfunction

P1643 CAN link engine control module.

P1582 Flight recorder data stored.

ABS Automatic Braking System

U2509 Torque reduction request cannot be fulfilled by engine.

U2523 CAN message time out from engine control module.

GMC General Control Module

B2319 Mirror Passenger Vertical Feedback Potentiometer Circuit Short to Ground

B2496 Anti-Theft Horn ground fault

B2370 Rear Seat Heaters LH rear seat heater drive circuit fault

B2493 Exterior Lighting: Front LH front side lamp drive circuit fault

B2491 Exterior Lighting: Front RH front side lamp drive circuit fault

B1987 Pedal Adjust Pedal adjust motor fault

B1458 Wash / Wipe System Windshield washer pump drive circuit failure

C1755 FEM right seat heater power down

EPB Electronic Parking Brake

U1134 Invalid or missing data for ignition switch or starter

 

yes, nothing

 

I would guess at low voltage due to battery being bad or just discharged or a bad connection in the +ve distribution network. See what your reader indicates for voltage at the OBD connector, with power being drawn by as many items as you ca turn on.

 

The noise it made before she turned it off should point you in the right direction. See if you can get a better description of the “new” noise can get

 

I'm going to venture a wild guess that the inhibit switch has tripped somehow - cutting off fuel and ignition. From there you probably have ground issues and blown fuses.

With the air to coil-over change, you probably need to disable some suspension control module functions

What is the car history, what state did it come from and what is its sale history? If it came from an auction or was sold after a few months after any US or state flood event, all bets are off.

That long list of codes is probably due to low battery / low voltage then triggering a laundry list of issues from missing/low/no electrical power. That will need a systematic troubleshooting to make sure fuses and relays are performing starting with the ECM and Ignition controlled circuits and relays.

You really cannot perform any reliable diagnostics without first attaching a maintenance style fixed output power supply - not a battery charger, and then have a proper diagnostic interface. OBDII is good for basic, but you need software and interface that recognizes and communicate properly with all the various modules.

All the rest is pissing into the wind until the basics are properly diagnosed and restored.

 

Griff, check your PM

 

Responded, thanks

 

Greetings,
I have some updated information on this dead XJR. My ICarsoft code reader had an update so I brought the software current and re-scanned the car. First, I cleared all the codes and then manually scanned each module available. Some of the modules would not connect. The TCM is the one that I had hoped that the software update would allow communication but no dice, grrrrrr! Now I realize that this information may be incomplete because I am unable to start the car but here is what came up. I agree with Glenn that the diagnostic is very "take a guess" at this point nut if you have any thoughts please feel free to assist. I am stuck.
Best,
Griff

Codes:
ECM
P0560 System Voltage
P1643 CAN link/transmission control unit circuit network malfunction
P1582 Flight recorder
P1696 Speed control input switch fault

ABS
U2509 Torque reduction request cannot be fulfilled by the engine management system
U2523 CAN message time out from ECM

GCM
B2319 Passenger exterior potentiometer mirror low