Hello
I am very sorry to open an Air Suspension Post. This is my Second post at this Forum.
I bought a beautiful CA 70K mils Clean car fax 2004 XJR. I wanted to daily drive it I changed a lot of grate parts just like front and rear ceramic brakes+ parking brake and other parts. Changed a new front drivers Air Suspension and it worked fine for a few days. But still my car didn't passed the MD inspection because the rear tern signals where acting funny It was giving revers and hazard!!... I read a lot and a lot and know that maybe the fuse box or rear model. Took the 2004 XJR a good Jag mechanic at Hunt Valley changed the fuse box and the rear tern signals work fine. But after a day the whole front is down!.. It was a very bad experience with my two year old daughter in the 695 High Way air suspension fault vehicle too low stopped on the side turned of the car for a few minuets and prayed, I went back and started the car and it raised back the red went off and only the yellow was on so it was only the Air suspension fault was there the car was drivable. Now I tried the car for a few times.

1.some times the nose go down turn the car for a few munities start it again and it raises.
2. some times I see a yellow on the dash air suspension fault BUT the car is fine!!.?

I need the cheapest solution because I am planning to sell the car this month for leaving USA and I know I will not get my money back. I all ready paid a $1000 in parts. I will tell the new owner abut every thing that I know about the car and what did I fixed.
Trust me if I was keeping the XJR I would convert it to coil spring suspension Suncore Industries and save my self.

https://www.ebay.com/itm/Air-to-Coil...wh1paS8WJ#rwid

Question
1. Is it a leak
2. Is it the fuse box that I changed?
Pleas Help If you can
Thank You

 

Info for you. (TSBs are your friend)

bob

 

Thanks

 

Hi ariba,

However unlikely it may seem that the front suspension dropping is the result of changing the Rear Power Distribution Fuse Box (RPDFB), it is possible. The Air Suspension Control Module (ASM) receives its constant battery B+ power via Fuse 52 in the RPDFB, and ignition-switched power via Fuse 12 in the RPDFB, so if there were intermittent interruptions in the power supply to the ASM you could have problems.

The most common cause of the front end dropping is a leak, either at an air hose fitting, in the top seal of an air spring, or in an air spring bladder.

The most common cause of the suspension taking too long to raise is a worn piston ring/seal in the air compressor. The piston ring can be easily replaced with a kit from our member bagpipingandy.com.

The diagnosis may be accelerated if you can have the car scanned for stored diagnostic trouble codes (DTCs). Some suspension problems will trigger codes that can only be read by systems capable of scanning proprietary Jaguar DTCs, including codes that begin with B (for Body), C (for Chassis) and U (for Undefined, but mostly Network-related codes). If your mechanic has a system that can read Jaguar B, C and U codes, it may be very helpful to know if any of those codes are flagged.

Cheers,

Don

 

Thank You