Self Leveling Suspension InActive - Error code: Compressor Relay

[cuban_bmwx5]

and dark stranger hope that suspension compressor repair kit works for you

[Dark_stranger]

OK, fitted the compressor repair kit and directly tested the compressor by connecting to a car battery , by passing the relay, solenoids, etc. by cutting the compressor power cables (see white insulation tape) and connecting to battery. The compressor works fine.

Therefore connected the black air pipe to the compressor, but not the solenoid and air flowed through the black pipe, therefore connected free end of black air pipe to the solenoid and turned on the compressor. It fired into life, but the air was not flowing through/pass the solenoid!

So I guessed the solenoid needed a power supply and therefore took to car, connected to car power supply and nothing. The compressor did not rumble into life. I tried swapping relays, but still no life.

I doubt its a sensor as you would expect at least one to work. Does the air suspension only have a fuse in the rear? if so, what number fuse is it?

Any other ideas?

[joeboch348]

Check the battery area for WATER....When your tail gate drains clog (and they will) water follows the wires down to the battery box..ruins the modules, radio. Very costly even buying used. happened to me 2X.

I have sense filled the wire loom with silicone.

[Dark_stranger]

Originally Posted by joeboch348

Check the battery area for WATER....When your tail gate drains clog (and they will) water follows the wires down to the battery box..ruins the modules, radio. Very costly even buying used. happened to me 2X.

I have sense filled the wire loom with silicone.

Nope, all dry. I also just checked fuses in rear (2) and front (1) and all fine. I could try buying a whole new compressor unit with relay\solenoids or just new solenoids, but that doesn't guarantee it will fix the issue.

[Dark_stranger]

Is there a control module for the suspension.

[Dark_stranger]

Someone on another forum has posted the below diagram and it does look like the compressor and relays are powered by the control module and therefore that might be the next thing to swap out.

[Jleecare]

Hi, I just fix my last week by replaced the air suspension module in the battery compartment. It's item #13 in picture from the link below and part # 37142288993
RealOEM.com * BMW E53 X5 4.6is LEVELL.DEVICE, AIR SPRING AND CTRL UNIT

[Dark_stranger]

What symptoms where you having?

[Jleecare]

I got msg "suspension inactive" in the dash. Replaced the fuse. Didn't change anything, I did some research and found few people succeeded by replaced the module in the trunk. So I buy a used module ($150) and did a swapped. That fix the problem for me. Also it's cheap to replace the module instead some other expensive parts that you unsure going to fix the problem.

[Dark_stranger]

Someone loaned me a air suspension control module and therefore spent all last night dreaming about the air suspension pump magically bursting into life after I connected up the loan control module and at first light, out on the driveway fitting it. Fired up the car and nothing, no rumble of the pump! I therefore tested the wire connection block (car end) that the pump, etc plug into and it was kicking out 13.*v, not a car expect, but would say that power was flowing to the pump.

I really doubt that both sensors have gone at the same time, so what else could it be? would the solenoid be the cause? or the black part of the pump? that controls the pump?

All comments welcome.