Mudplugger
Registered User
I've been leaving my Allroad parked on Level 3 (L3) for the last few days as the extra clearance has been useful around town, and it has happily dropped to Level 2 (L2) at the first sign of a fast road. As intented by Audi, so all good.
Yesterday morning however it refused to drop down to L2 on the motorway, and insisted on covering 50 miles on L3. I stopped a couple of times during that, turned the ignition off, waited a few seconds, and turned it back on again. This did no good and I reached my destination stuck on L3.
But worse was to come.
Yesterday evening the car decided, at about 70mph, to jack itself up from L3 onto L4. I did the normal things of pulling over, turning off the ignition etc. None did any good (except parking on a steep sideways slope which momentarily showed L3 and then went straight back up to L4) and I completed my motorway journey, at motorway speeds, stuck on L4. Occasionally on the motorway the L3 & L4 LEDs flashed together, 4 times, presumably to show that they knew where the suspension should be, and then went out again as the car couldn't get it down there.
The warning light on the revcounter, with the up & down arrows, illuminated dimly but constantly.
There is now basically no give in the suspension and the car is very bouncy to drive. It's exactly what I don't want on a slippery surface!
So today I have used VCDS to log all fault codes present, just in case, and then clear them.
Then I fired the engine up and tried, once again, to lower the suspension from L4 down to L3 by pressing the down button; I did this in my drive, without moving the car. After blinking the L4 LED 64 times (I think) the car stopped trying. Pressing the down button again did nothing, so the system had clearly given up trying.
I turned the ignition off, tried again, failed again (still without moving the car), and then used VCDS to extract the fault vodes. Here's what it said:
-------------------------------------------------------------------------------
Address 34: Level Control Labels: 4Z7-907-553.lbl
Part No: 4Z7 907 553 F
Component: - 2C1A1 D060
Coding: 25500
Shop #: WSC 00539
VCID: 4895ABBB42C1
1 Fault Found:
01400 - Suspension Level Control
08-10 - Control Limit Surpassed - Intermittent
-------------------------------------------------------------------------------
So, frankly, I'm at a bit of a loss here!
Recent problems with my compressor (see http://www.audi-sport.net/vb/a6-s6-...108538-a6-allroad-suspension-frozen-cold.html ) would lead me to suspect it's at fault. But surely that would stop the car going up (as it did before I added the tool oil) not down?
I don't believe the fault lies with the level sensors (even though one was featured in the list of faults I cleared with VCDS before repeating the problem) because they knew I should be at L2 on the motorway, but wasn't, and none are shown in the VCDS fault log now.
I'm wondering if there is a relay or similar that controls the dump valves that could be at fault, and refusing to open thyem to let the car down? Or some water somehow frozen in there? But even that doesn't explain what made the car decide to jack itself UP from L3 to L4, when it should really have been trying to lower itself DOWN from L3 to L2.
So I'm stumped.
Any ideas anyone?
Yesterday morning however it refused to drop down to L2 on the motorway, and insisted on covering 50 miles on L3. I stopped a couple of times during that, turned the ignition off, waited a few seconds, and turned it back on again. This did no good and I reached my destination stuck on L3.
But worse was to come.
Yesterday evening the car decided, at about 70mph, to jack itself up from L3 onto L4. I did the normal things of pulling over, turning off the ignition etc. None did any good (except parking on a steep sideways slope which momentarily showed L3 and then went straight back up to L4) and I completed my motorway journey, at motorway speeds, stuck on L4. Occasionally on the motorway the L3 & L4 LEDs flashed together, 4 times, presumably to show that they knew where the suspension should be, and then went out again as the car couldn't get it down there.
The warning light on the revcounter, with the up & down arrows, illuminated dimly but constantly.
There is now basically no give in the suspension and the car is very bouncy to drive. It's exactly what I don't want on a slippery surface!
So today I have used VCDS to log all fault codes present, just in case, and then clear them.
Then I fired the engine up and tried, once again, to lower the suspension from L4 down to L3 by pressing the down button; I did this in my drive, without moving the car. After blinking the L4 LED 64 times (I think) the car stopped trying. Pressing the down button again did nothing, so the system had clearly given up trying.
I turned the ignition off, tried again, failed again (still without moving the car), and then used VCDS to extract the fault vodes. Here's what it said:
-------------------------------------------------------------------------------
Address 34: Level Control Labels: 4Z7-907-553.lbl
Part No: 4Z7 907 553 F
Component: - 2C1A1 D060
Coding: 25500
Shop #: WSC 00539
VCID: 4895ABBB42C1
1 Fault Found:
01400 - Suspension Level Control
08-10 - Control Limit Surpassed - Intermittent
-------------------------------------------------------------------------------
So, frankly, I'm at a bit of a loss here!
Recent problems with my compressor (see http://www.audi-sport.net/vb/a6-s6-...108538-a6-allroad-suspension-frozen-cold.html ) would lead me to suspect it's at fault. But surely that would stop the car going up (as it did before I added the tool oil) not down?
I don't believe the fault lies with the level sensors (even though one was featured in the list of faults I cleared with VCDS before repeating the problem) because they knew I should be at L2 on the motorway, but wasn't, and none are shown in the VCDS fault log now.
I'm wondering if there is a relay or similar that controls the dump valves that could be at fault, and refusing to open thyem to let the car down? Or some water somehow frozen in there? But even that doesn't explain what made the car decide to jack itself UP from L3 to L4, when it should really have been trying to lower itself DOWN from L3 to L2.
So I'm stumped.
Any ideas anyone?