Thread: Air suspension.

Originally Posted by V8Ian

Is the ride height sensor halfway along the trailing arm, or is that the ACE sensor?
Which fuses and relays are relivant to the compressor?
TIA.

Those are the ride height sensors for the SLS.

ACE is G-sensors in the roof and floor.

Originally Posted by V8Ian

1. Is the ride height sensor halfway along the trailing arm?
2. Which fuses and relays are relivant to the compressor?
TIA.

1. Yes
2. Fusible link FL9 and relay R5 engine bay fusebox

SITUATION: Right hand airbag not inflating.

PRELUDE: Everything normal, drove 20 km to town, parked and ran an errand. Returned 5~10 minutes later to find RH bag deflated. Started car, compressor kicked in drove 1.5 km to get fuel. At service station both bags were deflated. Cleared the forecourt and engaged off road height. LH reinflated, RH not. Drove the 20km home and at one stage the RH seemed to partiality inflate but was totally exhausted on arrival.

AIM: Confirm the issue and rectify. I have jacked the chassis 12~15", extending the suspension (to gain room for access). I have jacked the RH axle with barely enough clearance to remove wheel. Wheel removed and ride height sensor disconnected from trailing arm.

RESULT: All doors and bonnet closed, manipulation of the RH sensor fails to activate the compressor. Check fuse, OK. Swap relays, same result, no compressor engagement.

Are my tests and methods flawed? Is it a compressor failure? Has the compressor failured secondarily to the airbag?
The LH bag is totally deflated, RH partiality.

This will be hard to diagnose without nanocom or similar cos it seems that a bag leak appeared and the compressor exceeded the duty cycle by compensating for it and then it will not kick in again untill the specific faut code is cleared unless it gave up the ghost before the ECU got to protect it... a simple test would be to remove the relay and bridge the perpendicular cavities in the fusebox(where te relay's contact goes) with a piece of wire for a second, if the compresor is OK you'll hear it working, it will not inflate the bags cos the valves are closed(those are managed directly by the ECU)...now:
1. if you can't hear the compressor with bridged relay and the fuse is 100% good then most probably the compressor is gone as result of the leak which made it to overwork.
2. if you hear the compressor then you definitely need a diagnostoc tool

I have a nanocom, I'll go and see what I can blow up.
Stay close to your computer, Sierrafery!

I didn't blow anything up with the Nanocom.
I managed to get the compressor to make a noise, but it has recorded no faults.
I'm baffled.

Order a set of coils.....

Originally Posted by scarry

Order a set of coils.....

Is someone up the back mumbling?