Drove my 2008 XKR convertible 2 days ago. Ran fine. New battery 3 months ago. I keep it on a battery tender because it has had all of the XKR top issues that relate to low battery voltage. Got in it this morning. Stepped on the brake and hit the start button. Start button lit up, but nothing else happened. No dash warning lights or "dinging" or anything. I tried about 10 times. NOTHING. The car didn't go into "run" mode. I tried sticking the key in the emergency slot in the console and it didn't help. But the key is locked in the slot now and won't come out. I got out of the car and the running lights came on and won't shut off. The start button is on. The horn will blow, but nothing else will come on. No headlights, no wipers, nothing. Just for the heck of it I hooked a jump box up to the terminals in the trunk and it made no difference. Three hours later and nothing has changed. The running lights (rear tail lights and daytime front lights) are still on. Key won't come out of the slot in the console. Unfortunately the top is down, so getting at the battery is pretty much impossible. I guess if needed I'll try the manual top thing to try to get the top up enough to access the battery. HELP!!!!!! The nearest Jag dealer is 2 hours away, and the only place that will work on Jags in my area is a rip off joint! I've been searching for a solution online, but don't see anything that matches my problem. Thanks in advance for ANY help!

 

If you press the keyfob down will it release from the console emergency slot? If it does then try locking the car by pressing the lock button on the fob twice. The car should beep on the second press. See if that clears anything.

If not, and nobody has a better solution, I would start by getting the top up and disconnect the battery for a few minutes. AFTER it is disconnected you can hold the two leads from the car together for 15 seconds or so to drain any capacitors in the power supplies. Then reconnect and see what happens.

 

I have just gone thru. a similar thing with my 08 XKR , look up my recent post ( My car won't start and is stuck in park ) I just got it back yesterday from the dealer with a $1000 bill . pluss I put in a new Batt. but that was not the cause . they found the problem in the wireing harness in the engine bay , right side , they say it was a bad connection where the harness connects together. I sent them an email to give me more info , the mech. had left when I pick up the car . Bernie

 

Bernie: please let us know exactly (I emphasize this: exactly) what and where the fault is, that is, where the connector is- because this could be very valuable information if this proves to be the cure to this rare problem. Thanks! And was it MCL or ? dealer that found the problem?

 

Here is a possibly related symptom and I wonder if anyone has ever experienced it: occasionally you press the starter button (with or without pressing the brake pedal - in other words this is related to the activation by the button, not the brake), the driver's display lights up as normal but very briefly, and then goes dark - which means that the starting sequence cannot be completed. It does not matter whether you press the brake first or press the button first. A second attempt almost always completes the starting sequence and the engine starts normally.
This is not in any way related to the battery -which is kept on a CTEK unit and is fully charged - and there are absolutely no other symptoms.
I doubt that it is related to the starter button itself (this is a low-km car). Because the car always starts it is a minor issue and I have heard of this behaviour on other cars. Any comments?

 

IT WAS THE DEALER IN KELOWNA. I have ph them and sent three emails but they dont responed. I cant see anything that looks like a repair. I told them I need to know for chance it happens again.
I will keep at them . I live 150k away I will call in there next time we go to Cosco . Will ph again tomorrow. Bernie

 

Thanks Bernie. A phone call to the service advisor would probably be more effective than email. Your problem may have been as simple as a connector not tightly connected (but they generally have a clip that holds them securely) .

 

I both sent a email and ph. them as promised but was put off again the mechanic was on a rd test and would get back to me ,again which did not happen, so I filled in a contact report on their web page direct to the manager of the dealership , this time I received a acknowledgement to get back to me next day which as its a holiday here will be Tue . Sorry for the delay. Bernie

 

Safe to assume the OP solved his problem. Hasn't been on the forum since posting this.

 

I experienced the exact same problem with my 2007 XKR Convertible in April 2016. I started a forum thread back then which gave me many battery related suggestions but did not identify or resolve the real problem. After some unsuccessful work by a jaguar specialist the system simply came back to life during his checks on the instrument panel. No apparent faults were found. The car ran well for a couple of weeks and then the fault returned. I resolved it by firmly tapping the top of the instrument panel a couple of times with the palm of my hand. There is clearly a connector or wiring loom issue behind the instrument cluster which could not be pinpointed. The problem returned very regularly over a period of a year which I resolved with the "firm taps procedure" every time. In May this year I had cause to replace the trim that raises and lowers as the steering column is adjusted. While changing out the part I "wiggled" the connecters and wiring behind the instrument cluster. The problem has not occurred since then. I don't believe I have resolved the problem permanently but it seems I can always get the car home....and it hasn't cost me anything so far as the specialist would not take a payment for the work he did! If anyone comes up with a root cause and solution to this problem I would be grateful to hear it.

 

SORRY FOR THE LATE REPLY. The dealership have been replying to the wrong address .

 

The problem received today.

High speed communication network was down between modules not talking to each other .traced back to connection behind right side kick panel not connected . ( connector . 1POO3 ).
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How this would happen from one min. to the next beats me . Hope this helps others. Bernie

 

[QUOTE=sherbercars;1756361]
High speed communication network was down between modules not talking to each other .traced back to connection behind right side kick panel not connected . ( connector . 1POO3 ).


This connector is on the CAN High Speed Bus, see highlighted area in attached, which if it comes disconnected breaks the CANBus communication to many modules including ECM and instrument cluster. This would explain why the problem surfaced but I don't know why it would be disconnected or partially disconnected to begin with

 

FYI connector is IP003

 

I too find it odd that the connector just disconnected . Time will tell. Good luck

 

[QUOTE=hafren;1777529]I dont seem to be able to bring up your att. BL.

 

[QUOTE=sherbercars;1783976]Just the wiring diagram Fig. 21.1

 

[QUOTE=sherbercars;I dont seem to be able to bring up your att. BL. QUOTE]

What do you mean by "att. BL." ? Are you unable to open the attachment to post #13? Sean W has reposted it.

Fig 21.1 shows the location of connector IP003, highlighted, which if disconnected will break communication on the CanBus which would explain the issue you experienced.

 

Had this same situation today with my 07 XK coupe. Put key in console in attempt to start.
No success. Then alarm engaged,horn lights etc. Key fob locked in console and would not eject. I opened the door and the alarm stopped. (at least that was good). I read this thread and attempted to disconnect battery(which is 6 months old). Only got the positive terminal off. Waited about a minute and reconnected.
Car ejected console key. Dash instruments lit as they should. Car started as if there had never been an issue. I'm confused but simple battery disconnect seemed to reset and solve (I hope) the problem.

 

Same here.