Allroad, basic height settings. Help please.

[Paulouk]

My AR is giving me 'Height not learned' fault 01437 and hence a permanent yellow warning light.

Have been useing my Ross-Tech VCDS to do the basic (402) setting via 'adaption'.

I seem to be able to do first wheel (Chan 1) and sometime second wheel (chan 2) but not channels 3 & 4 as it gives me error and of course because I cannot finish the process I cannot save in channel 5.

I do this with engine running to make sure I dont run out of air (new compressor anyway)

Is there anything I can do to teach AR the basic heights? Any help or advice would be much appreciated.

[Crasher]

Is this a registered version of VCDS?

[Paulouk]

Is this s registered version of VCDS?

Yes this is a fully paid-up, registered version.

[bagpipingandy]

That error is common with cars with weak compressors, they cannot achieve level 2 properly which can show channel 3 & 4 don't work and so car suspension is not learned. if it is a brand new compressor, check the 4mm airline connection for leaks, if you have no other fault codes, I would be thinkjng low compression

Andy

[Crasher]

Four-wheel self-levelling suspension system: Self-diagnosis
Basic settings
If the control unit, the vehicle level sender or the entire unit is replaced, the basic setting procedure (Adaption) must be performed. The tolerance for the set point specification (normal level 402 mm) is specified at +/- 5 mm on the axle side.
If the new control system does not stabilize, the engine must be started (it is possible that the pressure in the pressure accumulator is no longer sufficient) and all doors must be closed.
The following values are then learned:
◆ Measured height distance at front left (Channel 01)
◆ Measured height distance at front right (Channel 02)
◆ Measured height distance at rear left (Channel 03)
◆ Measured height distance at rear right (Channel 04)
Test preconditions:
◆ Power supply and fuses for the respective system O.K.
◆ Connect fault reader
Working procedure
‒ Position the vehicle on a level surface.
‒ Switch the ignition on.
‒ The basic setting is performed via Function 11 "Log-in".
Perform Function "11 - Log-in"
11 - Log-in procedure
‒ Confirm the entry using the Q button.
Enter code number 31564
‒ Confirm the entry using the Q button.
Entry of the measured height values is performed using Function 10 "Adaption".
10- Adaption
‒ Confirm the entry using the Q button.
enter channel number 01
‒ Confirm the entry using the Q button.
Display: Channel 1 Adaption 402 ⇒
Wait
Wait, the vehicle will now be raised automatically to two different height levels.
The following is displayed after completion of adjustment:
Display: Channel 1 Adaption 402 ⇒
Enter value for wheel fl
‒ Press the ⇒button.
→ Display: Channel 1 Adaption 402
Enter adaption word 00410
‒ Measure: Value entered = Bodywork reference point relative to wheel centre point in mm e.g.: distance measured: 410 mm
◆ For performance of the measurement see
=> Running gear, front- and 4-wheel drive; Repair Group 43
→ Display: Channel 1 Adaption 402
Enter adaption word 00410
‒ Confirm the entry using the Q button.
→ Display: Channel 1 Adaption 402 Q
Value permissible
‒ Confirm the entry using the Q button.
→ Display: Channel 1 Adaption 402 Q
Store changed value?
‒ Confirm the entry using the Q button.
→ Display: Channel 1 Adaption 402 ⇒
Changed value has been stored
Press the ⇒button.
→ Display: Fast data transfer HELP
Select function XX
‒ Continue adaption for the remaining three wheels.
‒ Channel 02 - Wheel fr
‒ Channel 03 - Wheel rl
‒ Channel 04 - Wheel rr
‒ Always measure the bodywork height on the corresponding wheel.
After entry of the four measured values the entry must be confirmed using Function 10 "Adaption".
Select function XX
‒ Press Buttons -1- and -0-.
10 - Adaption
‒ Confirm the entry using the Q button.
→ Display: Adaption Q
Enter channel number 05
‒ Confirm the entry using the Q button.
→ Display: Channel 5 Adaption 1
Enter Value 1
‒ Press the ⇒button.
→ Display:: Channel 5 Adaption 1
Enter adaption word 00001
Note:
Press Buttons 0, 0, 0, 0 and 0 if you wish to terminate adaption
‒ Confirm the entry using the Q button.
→ Display: Channel 5 Adaption 1 Q
Confirm the entry using the Q button.
The following is now displayed:
→ Display: Channel 5 Adaption 1 Q
No calibration possible
‒ Abort using the C button and repeat the calibration.
Display after successful calibration:
→ Display: Channel 5 Adaption 1 Q
Store changed value?
Confirm the entry using the Q button.
→ Display: Channel 1 Adaption 0 ⇒
Changed value has been stored
Press the ⇒button.
→ Display: Fast data transfer HELP
Select function XX
‒ Basic setting is then completed.
The indicator light goes off.

[Paulouk]

That error is common with cars with weak compressors, they cannot achieve level 2 properly which can show channel 3 & 4 don't work and so car suspension is not learned. if it is a brand new compressor, check the 4mm airline connection for leaks, if you have no other fault codes, I would be thinkjng low compression

Andy

Thanks for that Andy. Fitted a new compressor a few weeks ago. I have monitored the running of the compressor and it seems minimal (not running a lot). I dont think I am running out of air because, as you are no doubt aware, once the 'adaption' proceedure is entered the AR going down to level 1 and then returns to level 2 before you can enter new values into ch 1,2,3 & 4. The AR seems to be attaining L2 ok.

[Paulouk]

Thanks Crasher. I am happy with the proceedure it just that I cannot complete channels 3 & 5, so cannot save in channel 5.