Allroad Air Suspension Compressor strip & repair

[ertatta]

Aaron,
very curious as to what exactly involved fixing your level sensor? I suspect I could also have an issue there as well, but how did u determine this and how was it resolved?

[bagpipingandy]

Oh for a crystal ball Andy, eh?

If you'd negotiated £1 a view for this thread before you started it, you'd be sitting on a beach in the Bahamas sipping Dairaquis at the moment

Hee, hee if only we had thought of that!! no bahamas though it still wouldnt cover the cost of running an allroad!!

Aaron,
very curious as to what exactly involved fixing your level sensor? I suspect I could also have an issue there as well, but how did u determine this and how was it resolved?

Ertatta, i assume you still get the level sensor error code?, you could swap it with another sensor from another corner to see if the fault moves with it if so then replacing it would be the only solution

regards

Andy

[ertatta]

andy, i've finally had the time to get the replacement arnott air spring installed but haven't got around to the compressor rebuild kit u sent a while back. so how do i go about getting out of this "failed" ride height calibration state that i am locked into. the orange up arrow is still displayed on the dash and when i try to enter values for the different channels, i get "error" for the various channels. not sure why the arnott tech guy had me do this procedure when he knew i had the front wheel off and the car sitting on bump stops. this led to not being able to complete the calibration, which is why i believe everything is locked up and not responding.
where do i go from here in resolving this with my vagcom? thanku for your support andy!

[bagpipingandy]

Hi Ertatta,
confirm is the error light on constantly and what are the fault codes on module 34 Today?

to do the calibration you need no existing faults (appart from maybe your 01437 - Control Position not Learned)

also check module 55 as it last told you you have a faulty level sensor (00776 - Level Control System Sensor; Left Front (G78) )
EVERYTHING needs to work before caryinging out the calibration,

when you have tried to start the calibration previously what happens? the compressor should run and it should try to lift to level 2 does it do this? does the compressor run?

if the compressor runs ok but it does not get to level 2 this would be a suspect weak compressor which the kit will fix, but i recommend dont fit it until you confirm there are no other problems, level sensors and so on, 1 step at a time? if no errors we then want to clarify if the compressor is actually runnning.

so:

check for faults in 34 and 55, if no codes other than 01437 then try calibration procedure WITH wheels on the ground!!
when you start the procedure the compressor should run it should try to lift to level 2, if the compressor runs ok but it does not get to level 2 it will time out and lock the procedure, ONLY if the comrpessor does run but no level 2 i would then fit the kit and try the procedure again.

if no compressor running then we are looking at fuses, relay, compressor motor, or wiring to get it working

best regards

Andy

[ertatta]

hi ertatta,
confirm is the error light on constantly and what are the fault codes on module 34 today?

-error light is constant
-address 34: Level control labels: 4z7-907-553.lbl part no: 4z7 907 553 b
component: - 2c1a1 x031
coding: 25500
shop #: Wsc 09999
vcid: 449980cc54587f3ef0b-515a
3 faults found:
01400 - suspension level control
53-10 - supply voltage too low - intermittent
01400 - suspension level control
08-10 - control limit surpassed - intermittent
01437 - control position not learned
35-00 - -


to do the calibration you need no existing faults (appart from maybe your 01437 - control position not learned)

also check module 55 as it last told you you have a faulty level sensor (00776 - level control system sensor; left front (g78) )
everything needs to work before caryinging out the calibration,

-address 55: Xenon range labels: 4z7-907-357.lbl part no: 4z7 907 357
component: Dynamische lwr d05
coding: 00030
shop #: Wsc 02325
vcid: 041940cc14d8bf3eb0b-4b64
2 faults found:
00776 - level control system sensor; left front (g78)
28-10 - short to plus - intermittent
00532 - supply voltage b+
07-10 - signal too low - intermittent

when you have tried to start the calibration previously what happens? The compressor should run and it should try to lift to level 2 does it do this? Does the compressor run?

-unfornuately yesterday i tried this procedure twice and the compressor is not running in response. It did run a couple weeks ago before i tried this calibration procedure and the rear bags were filled. Did this procedure somehow lock it out from running? The level buttons do flash for 15 sec but i don't here compressor or any change of level.

If the compressor runs ok but it does not get to level 2 this would be a suspect weak compressor which the kit will fix, but i recommend dont fit it until you confirm there are no other problems, level sensors and so on, 1 step at a time? if no errors we then want to clarify if the compressor is actually runnning.

-would the failing air spring cause damage to the level sensors or other electronics that are showing up in the vagcom scan?
so:

Check for faults in 34 and 55, if no codes other than 01437 then try calibration procedure with wheels on the ground!!
when you start the procedure the compressor should run it should try to lift to level 2, if the compressor runs ok but it does not get to level 2 it will time out and lock the procedure, only if the comrpessor does run but no level 2 i would then fit the kit and try the procedure again.

-sadly i'm not even getting to this point, so where might u suggest i start in resolving these errors?

If no compressor running then we are looking at fuses, relay, compressor motor, or wiring to get it working

best regards

andy

[bagpipingandy]

Hi Ertatta,

STEP 1:
are these codes cleared and then re-read today? your post earlier shows Open or short codes now they say intermittent? I would expect some to go away if they were cleared today, if not please clear codes and then re-read them and post them up

STEP 2:
is the battery weak lower than 12V? why the low voltage errors, may be a red herring but, again try clearing and reading codes with the car running?

STEP 3:
the 00776 code in module 55 points to a level sensor issue, clear the codes if it comes back then
see link: 00776 - Ross-Tech Wiki

to have a look at the level sensor go to module 34 go to measuring blocks and go to group 004 what do the level sensor values show? looking for a bad reading on the front LH,

Lift the car (slightly) on each corner to see if the values move +ve when lifting the corner up. if the front Left doesn't behave it needs fixing, either the sensor or the wiring to it.

a failing air spring should not damage the level sensor but someone replacing an airspring may damaged it accidentaly, check the level sensors function as per step 3 above.

I would hope/expect only to be left with the 01437 code

report back what you find then we can try the next steps!!


regards

Andy

[ertatta]

hi ertatta,

step 1:
Are these codes cleared and then re-read today? Your post earlier shows open or short codes now they say intermittent? I would expect some to go away if they were cleared today, if not please clear codes and then re-read them and post them up

-this was the 1st scan from yesterday without engine running. And yes the battery has been comprised over the course of a month without much usage. The scan i posted earlier today was done 2 hrs later after the car had been running for 30 min or so. Should i purchase a new battery?

address 34: Level control labels: 4z7-907-553.lbl
part no: 4z7 907 553 b
component: - 2c1a1 x031
coding: 25500
shop #: Wsc 09999
vcid: 449980cc54587f3ef0b-51d0
3 faults found:
01400 - suspension level control
53-10 - supply voltage too low - intermittent
01400 - suspension level control
08-00 - control limit surpassed
01437 - control position not learned
35-00 - -

step 2:
Is the battery weak lower than 12v? Why the low voltage errors, may be a red herring but, again try clearing and reading codes with the car running?

Step 3:
The 00776 code in module 55 points to a level sensor issue, clear the codes if it comes back then
see link: 00776 - ross-tech wiki

to have a look at the level sensor go to module 34 go to measuring blocks and go to group 004 what do the level sensor values show? Looking for a bad reading on the front lh,

lift the car (slightly) on each corner to see if the values move +ve when lifting the corner up. If the front left doesn't behave it needs fixing, either the sensor or the wiring to it.

A failing air spring should not damage the level sensor but someone replacing an airspring may damaged it accidentaly, check the level sensors function as per step 3 above.

I would hope/expect only to be left with the 01437 code

report back what you find then we can try the next steps!!

- i'll go out and try this and report back in the next hour or so. Thanku!


Regards

andy

[ertatta]

andy,
vag sans from yesterday evening and this morning come up with the same results. the same 3 faults under module 34. where do i start in regards to checking out the wiring related to the ride height sensors or whatever else might be causing this?
thanku

[ertatta]

photo-4.jpg

[bagpipingandy]

andy,
vag sans from yesterday evening and this morning come up with the same results. the same 3 faults under module 34. where do i start in regards to checking out the wiring related to the ride height sensors or whatever else might be causing this?
thanku

read and follow STEP 3 Above

regards

Andy