Hi all.

After putting the XKR away in the garage over the winter suprise it has an issue with being unable to start.

Originally the alarm would go off every time I tried so after some diagnostic I changed the drivers door latch and window module plus swapped out some relays and she fired straight up.

Problem is now I have lots of warning massages:
Boot open - it's not open.
Bulb fail rear- the only bulbs not working are the internal ones which did work but no longer do.
Suspension faut.
Restricted performance.

Other issues.
After unlocking the central locking handles open and close several times.
Boot/fuel cap release button not working but did.
Alarm does not go long off, full stop.
Roof open/close switch is dead. Did work fine
Airbag light is flashing but fixed this last year.

Codes showing
P0507

I have checked the SCLM connections and noticed it has a clip slot free, should something be plugged in here?



I'm guessing all of these issues are related so any advice would be most appreciated?

Thanks in advance

 

P0507 Idle rpm higher than expected

Engine and transmission at normal
operating temperature; IAT > 18 °F
(-8 °C); gear “N“; idle > 30 seconds
(no electrical load, A/C compressor,
radiator fans, brake pedal switching
during period)
Surface elevation < 8,000 ft (2,438 m)

Possible Causes
Intake air leak between MAFS and
throttle
Intake air leak between throttle and
engine
Engine breather leak
Throttle valve stuck open
Throttle assembly failure

I would check ALL the DTCs in all the modules on the CAN bus.

 

Thanks for the advise Motorcarman.

Can you advise where the CAN bus is and what it looks like?

Cheers

 

The CAN bus is one of the networks for modules to communicate.

 

Hi,
from a hardware perspective, I would look towards the throttle body and vacuum leaks.

Regards, Wili

 

Before doing anything else check your battery is fully charged - in particular "After unlocking the central locking handles open and close several times." is typical behaviour when you have a flat battery.

As Motorcarman says, read the fault codes (DTCs) once you have checked your battery. An OBD dongle and the Torque app is the cheapest/easiest way of doing this.

And finally a warning: don't fiddle about with the wiring or any modules before you have done the above - old wiring is like a sleeping dog..

 

What I'm about to say might not be correct or accurate. Where you've stored it, could an animal get in? It's possible a wire might be chewed through, but there are too many problems at once for it to be a foreseeable issue. My daughter had a problem with the heating module (in a Peugeot), and it was a broken wire under the seat. The culprit? The dog. Check the battery first.

 

Thanks for the advise all.

I charged the battery over night which is reading 13.26 v which I think is okay but the central looking is still doing the same and the error messages are still the same, the boot lights are working again though.

Using my Icarsoft reader the only codes I have are related to the Dampers and are:

C1427
C1432
C1422
C1516

When I have time in the week I will check the connections to the Throttle body too.

 

Hello,
what voltage does the battery have after the charging cable has been disconnected for a few hours?
The 13.26V reading was immediately after disconnecting it?

Regards, Willi

 

Even though the battery shows a high voltage, it might not have enough power to start the car (although it could start a smaller engine). The battery charger might be charging, indicating the battery is fine, but used batteries may not reach a high percentage of their Ah capacity. If you have a vehicle nearby with a large, reliable battery, try swapping it with the XK8. First, try a battery that has been able to start a large engine (or a new, freshly charged battery). If it still doesn't start, then it's time to investigate further.

 

Sorry, I didn't ask if the engine turns over but doesn't start. If that's the case, I didn't mention it before.

 

Battery voltage should be 12.6v minimum after sitting overnight, and not connected to any charger for that time period.

less than that points to bad battery or sub standard charging rate.

Z

 

The car does start and run now but it has lots of error messages displaying.

It's now been over 12 hours since in was charged, the battery is reading:

13.16 v disconnected from the car
12.45v when the car is running.

Might just replace the battery anyway as it's about 3 years old now, any recommendations?

 

Sorry again, it does start, although it shows errors, it's not too bad. Is your XK8 equipped with CATS suspension?

 

Yes it does jhuertas.

 

when the car is running you should see a charging voltage of 14.0 to 14.

I’ve had good service from my NAPA AGM battery, going on 8.5 years so far.

Z

 

For the top & boot lid/fuel cap issues, check F#1 (5A) in the trunk/boot fusebox.

It may also clear the 'bulb fail rear' message


Jeez I wish IB would leave this editor alone. No way to change fonts now...

 

I don't have a CATS suspension, but I think the errors you're describing are related to that suspension. I would check for continuity from all four components to the controller. But I'm sure someone on the forum can help you more. Also, since the motor is "moving," I would try taking it for a short drive to move the car and the suspension components. This "feline" is still asleep.

 

Thanks for the advise Michael but unfortunately changing the fuse didn't clear anything, I have checked all of the fuses in the car which again hasn't found any problems.

All the lights on the car are working so maybe the issue is to do with the bulb fault, has anyone had that issue before?

Also how do I check a relay with a multimeter? So I can check all of those on the car

 

OK - can you also control the passenger mirror and window from the driver switchpack?