months ago i replaced the right rear wheel speed sensor. It had appearently went bad and caused all hell to break loose. This sensor effects everything, Trac Control, Cruise, Speedometer, Powersteering, Transmission Shifting even the Ride.... Well i replaced it, and everything went back to normal. Just after that i had the Park Brake malfunction when it engaged and woulndt disengage. (i had to maually cut the cable so i could get home)...... that was then, NOW i have all the same Symptoms as the first time. and the Codes are telling me that the Left Rear and Right Rear sensors are bad. I doubt the $300 sensor i baught from Jaguar has already went bad.... So my suspicion is thaT there is a problem somewhere down the line. Maybe with the wires that go to the sensors. Does anyone know if the wires for the sensors follow the same path as the Parkbrake? Im thinking that since the first Sensor malfuntion and the Parkbrake thing happened so close to each other maybe there is a pinched wire or something under the backseat? i have taken out and thoroughly cleaned the sensors and scrubbed the rings on each wheel so i know it isnt just dirt.
any ideas?

 

Hi Bobby,

I get random codes for that right rear sensor and I currently have a Park Brake Fault and have had Cruise Not Available since we bought our '04. I haven't been able to do a thorough investigation, but in case it helps you track down your issues, you can download the 2004 X350 Electrical Guide at the link below, which will answer your questions about common circuits, ground points, etc.:

http://www.jagrepair.com/images/Elec...al%20Guide.pdf


Please keep us informed.

Cheers,

Don

 

Hi
I too had the same problem with the rear offside sensor, spurious codes. I tracked the problem down to the sensor touching parts of the reluctor ring, this was obvious because the reluctor ring was polished, and eventually wearing through the sensor. New sensor arrived genuine Jaguar part and this too would have fouled on the reluctor ring, I had to shim using washers under the sensor to acheive 0.75 mm clearance about the same as the other side which has showed no issues. it has now ran perfect with no codes recurring.

2004 XJ 3.5 litre.
Alan