So ... you've got air pressure, otherwise back wouldn't be extended, but the front and back are out of sync.
Try a hard-reset and see if it re-syncs?.
Dean
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2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
13th Sep 2023 1:49 pm
JohnnyWong
Member Since: 14 Sep 2021
Location: Weitefeld
Posts: 10
Click image to enlarge
That was my first try.
Obd throws
U0100-87
U0155-87
C1A00-53
C1A27-12
C1A11-64
Is it possible that Valve block got stuck? Or Ecu Error?
Click image to enlarge
13th Sep 2023 2:05 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10734
Search the C codes on here, see what the description says.
14th Sep 2023 6:42 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10734
Seams to point to compressor wiring.
Can you hear in running?
Have you been trying to calibrate it and caused this?
14th Sep 2023 6:50 am
JohnnyWong
Member Since: 14 Sep 2021
Location: Weitefeld
Posts: 10
Compressor gets no signal to start. I can bridge it and then it runs. I haven't tried to calibrate it.
14th Sep 2023 10:29 am
JohnnyWong
Member Since: 14 Sep 2021
Location: Weitefeld
Posts: 10
Pete K wrote:
Search the C codes on here, see what the description says.
The c codes say: control Modul, valve blocks
14th Sep 2023 10:30 am
Sidestick
Member Since: 22 Apr 2012
Location: Rome
Posts: 2326
Did You checked the 60 Amps compressor fuse in to the battery box?
The picture of the 4x4 info seems to indicate different height condition vs the car's one- Easy-Lift suspension module 4.0
- GoodWinch 9500 lb
- Full underbody protections
- Tree/Rock sidebars
- Prospeed roofrack & ladder
- Compressor guard
- Raised Air Intake
- Driving lights (2+4)
- 50 mm Waffle boards
- Altox Heater control
- Overland Rooftop Tent
- Rear seats entertainment
- Front & Rear camera
- GVIF
- Removable tow bar
- Cubby box fridge
- BFG KO2 265/65R17
- iidTool BT
14th Sep 2023 12:40 pm
JohnnyWong
Member Since: 14 Sep 2021
Location: Weitefeld
Posts: 10
Yes, fuse is ok. I jacked the car up. All sensors show values according to obd2. But ecu sends no signal to compressor for startup.
14th Sep 2023 9:08 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10734
C1A00-53 CONTROL MODULE, SYSTEM PROGRAMMING FAILURE, DEACTIVATED
Fault code is c1a27-12 compressor circuit
Click image to enlarge
C1A11-64. Pressure increases when system inactive
The last two sugguest the compressor is stuck on. If that is not the case, then wiring fault.
Monitor what the live value of the pressure sensor, to see if reasonable.
Maybe earth fault near the suspension ecu, if the system is reading rubbish data.
Check connectors in the left front wheel arch
15th Sep 2023 9:46 am
JohnnyWong
Member Since: 14 Sep 2021
Location: Weitefeld
Posts: 10
Do you mean connectors of the valve? My disco is LH and not RH.
15th Sep 2023 9:52 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10734
No. There are loom connectors. Still in left arch.
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... All LED interiors lights, DRLs, Spare Wheel protector.
