Can you please let me know which one is the fuse for the Heated Steering Wheel on the 2008 Jag XKR? I have checked the fuse diagram available on line and it is NOT mentioned anywhere...

 

I don't believe there is one. The heated steering is powered directly from the central junction box internal power distribution which would be the 175 amp fuse.

 

Steering Wheel Heater
The steering wheel heater has 1 heat setting and can be turned on and off by pressing the soft button located on the seat heater TSD screen. The on/off status of the steering wheel heater is relayed to the vehicle occupants through the TSD. When the ignition is switched off, the heater will
reset to off.
Power for the heater element is supplied by the CJB (central junction box) on receipt of a request from the ATC (automatic temperature control) module over the medium speed CAN (controller area network) bus. Temperature control for the heater element is provided by the steering wheel heater control module which receives a temperature feedback signal from a NTC (negative temperature coefficient) thermistor located within the steering wheel.

 

the steering wheel control module is number 7 in this diagram. There is a slip ring connection between it and the touch screen control. the slip ring is on the column.

the heating element itself is of course in the wheel.

 

It sure is nice that everything is still simple in all the modern cars.

 

Indeed Cee Jay.

To access steering column, remove drivers seat.
Climb into vehicle in prone position.
While lying flat, cross legs in yoga fashion and slide buttocks toward rear of vehicle propping your rear end on back seat.
Using Jaguar special tool JJJ34598, remove the only screw of its type in the world.
Said tool can be purchased from Jaguar for $499.99.

Once removed, reinstall front seat.
Next, using a flat chisel and a 12 lb maul hammer, carefully prise the column cover away.
Take the round ring thingy and check for any defects.
For this you will need Jaguar special tool JJJ78639a, superseded by jaguar part number c2p47823423e3e3e. You will also need the North American adapter. Attach meter to ring using tool and read resistance. Is resistance => 1 ohm? yes - Replace part. No - Is resistance =< 1 ohm? yes - Replace part. No - replace part.

Remove seat again.
Climb into vehicle in prone position.
While lying flat, cross legs in yoga fashion and slide buttocks toward rear of vehicle propping your rear end on back seat.
Using color matched duct tape, hold together column with right hand.
carefully wrap tape around column, as the screw originally installed in the vehicle cannot be reused as it may disable the passenger airbag system.

 

 

Thank you for all the replies! I believe the steering wheel is not heating up properly (like my seats do). Is there anything I could check/do my self without "trusting" the car to a technician?

 

Sounds like a pair of gloves would be easier

Put them on your Xmas list!!!

 

How I wish the steering wheel in my car was NOT heated...

 

It depends on your skill set. You can check the wiring in the steering column using the diagrams attached using a multimeter. But if you've never used one and that sort of do it yourself isn't in your wheelhouse, then no, you need a technician.

Alternatively, you could swap parts but not something I recommend. Part number 7 in the diagram I posted should be easily recognizable once you have the column cover off, as is the slip ring. (just google images of automative slip ring and you'll see what they look like.) You can also make sure the parts are clean and the contacts are making clean connections.

I believe I read once on the X350 forum that the wheel heats to 86 degrees Fahrenheit FWIW. It's either on of off. The parts in the column are the likely culprits if you have heated seats and the steering wheel soft key on the touch screen is lighting up.

 

Laughed so hard my eyes were watering! Thanks Sean W!

OP
I've had the CJB replaced in my '07, so they do fail. Mine was for a faulty steering wheel switch.

Expect about $1300 for dealership repair if the CJB is bad. My receipt says there was programming involved, so it's not a DIY.

I heard of slip rings going bad, but an educated guess is that all wheel controls would be dead if that happened.

BOL

(BTW, it's in the 20s(f) outside, and I LOVE my heated wheel!)

 

DrG did you get this sorted through?

 

I haven't figured out if the steering wheel gets slightly warm by the heating element or by my hands holding on it!

 

If its heating, I think you'll know it, mine gets pretty darn toasty if I'm not wearing gloves.

 

Used mine today for the first time (it was 18 deg F). Toasty! Warmed up in about 1 minute.

 

Sorry for your troubles. You should definitely feel it. I'd begin by starting the car, leave the heat off and turn on the steering wheel heat only. let the car run for a minute or two. upon entry, the only thing warm in the car should be the steering wheel. As I mentioned, it gets to about 86 degrees.

 

It is definately not working....I thought it could bean an easy fix (fuse replacement) but apparently there is no fuse related to the heated steering wheel. I am certainly not taking it to the garage and having inexperienced technicians experimenting with what seems a not so common issue in a garage....

 

Yeah, one can buy pretty nice gloves for $500 *******!