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Air suspension ECU failing again and again

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Air suspension ECU failing again and again

  #1  
Old 05-06-2013, 04:56 AM
dtopland's Avatar
1st Gear
Thread Starter
Join Date: May 2013
Posts: 1
Default Air suspension ECU failing again and again

Hi Audi folks.

I have a Audi Allroad 2003 where the ECU for the air suspension fails again and again.

The local Audi dealer have replaced four ECU and all ride height sensors including wiring to the sensors. Still no improvement. The Audi dealer want to continue troubleshoot but want us to pay for every ECU failing, "This is out of our control" they say and can not carry the cost. At $1000 each ECU this quickly add to the cost of buying the car. Being an electrical engineer I try to solve this myself.

It seems like the ECU fails after the doors have been locked. The Audi dealer say it works fine with a new ECU but when picking up the car at the parking lot outside the shop the ECU is not working.

I have bought a used ECU and installed. IT worked partly when installing but when continue troubleshooting the next day the box was damaged. (yes, I locked the doors)

Even with a defect box I am able to read several parameters like air pressure, temperature and all four height sensors. This tells me the CPU inside the box is OK and the internal communication over the SPI bus is working as the input can be read.

When I installed the used box I was able to run the test using the WAGCOM and Ross-Tech diagnostic with OK as the result for the box

When running tests the following faults re-appear after cleaning error codes.

01575 Control Switched OFF 35-00 Permanent
65535 Internal Module Memory Error 00-00 Permanent
01777 Redundant signal path from controls for vehicle leveling (E281) 30-00 open or short to +

After cleaning error messages the green lights indicating level 2 appears on the switches on the instrument panel A green LED is also pressent on both the up and down switch. Pressing down is OK but pressing up turns all the LEDs off and lots of faults is stored in the system.

01575 Control Switched OFF 35-00 Permanent
I assume this is just because other faults caus ethe control to be disabled.

65535 Internal Module Memory Error 00-00 Permanent
I am afraid this is a permanent damage to the control module. Does anybody out there know if it is possible to flash the memory with fresh firmware? Maybe using JTAG or other tools for flashing.

01777 Redundant signal path from controls for vehicle leveling (E281) 30-00 open or short to +
This is the one I would like to know more about. There is supposed to be a redundant signal but I am not able to find any connection that appears to be redundant. The only wire I can think about is the one hard-wired to the "UP" switch but removing this does not make any difference.

Under is a full fault code report for the vehicle. Please note that the instrument panel is partly dismounted and some faults, like the fan, is a result of removed components.

Regards
Dagfinn Topland



VCDS Version: Release 11.11.5
Data version: 20121222

Thursday,02,May,2013,14:58:43:17644

Chassis Type: 4B - Audi A6 C5
Scan: 01 02 03 06 08 15 16 17 18 22 34 35 36 37 45 55 56 57 65 67
75 76 77

VIN: WAUZZZ4B83N045530 Mileage: 237240km/147414miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 059-907-401-AKE.clb
Part No: 4Z7 907 401 B
Component: 2.5l/4VTEDC G000AG D09
Coding: 01016
Shop #: WSC 36510
VCID: 3C7D921A2C2F4BF83D4
WAUZZZ4B83N045530 AUZ7Z0B2212216

1 Fault Found:
01375 - Valves for Engine Mounting; Stage 1
38-10 - Output won't Switch or Short to Plus - Intermittent
Readiness: N/A

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 01V-927-156.lbl
Part No: 4Z7 927 156 H
Component: AG5 01V 2.5lTDI RdW 2121
Coding: 00001
Shop #: WSC 00000
VCID: 4B9FC1C67981FC4084E

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8D0-907-389.lbl
Part No: 4Z7 907 389 A
Component: ABS/ESP allrad D55
Coding: 06457
Shop #: WSC 00110
VCID: 4A91C4C276FBE548BF8

1 Fault Found:
01310 - Level Control System Control Module (J197)
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 4B0-820-043-MY2.lbl
Part No: 4B0 820 043 AM
Component: A6-Klimavollautomat 0105
Coding: 00003
Shop #: WSC 02325
VCID: 65CB177EFF252A30B2A

1 Fault Found:
01273 - Fresh Air Blower (V2)
17-00 - Control Difference

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 4B0-959-655-AI84.lbl
Part No: 4Z7 959 655 H
Component: Airbag 8.4EP 2000
Coding: 0000706
Shop #: WSC 02325 785 00200
VCID: 54ADDABAF4BFA3B8D54

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 4B0-907-487.lbl
Part No: 4B0 907 487 H
Component: Lenkradelektronik D01
Coding: 01011
Shop #: WSC 02325
VCID: 3163B32EFB6DB6909E2

1 Fault Found:
01304 - Radio
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 4B0-920-xxx-17.lbl
Part No: 4B0 920 933 GX
Component: KOMBI+WEGFAHRS. VDO D17
Coding: 04060
Shop #: WSC 00120
VCID: 7F07A5167DB990E0586
WAUZZZ4B83N045530 AUZ7Z0B2212216

No fault code found.

-------------------------------------------------------------------------------
Address 18: Aux. Heat Labels: None
Part No: 4D0 265 105 J
Component: Standheizung Diesel D52
Coding: 00011
Shop #: WSC 02325
VCID: 254B577EBFA5EA3072A

1 Fault Found:
01444 - Under-Voltage Shut-Off (Automatic)
35-10 - - - Intermittent

-------------------------------------------------------------------------------
Address 34: Level Control Labels: 4Z7-907-553.lbl
Part No: 4Z7 907 553 A
Component: - 2C1A1 X019
Coding: 25500
Shop #: WSC 09999
VCID: 438FE9E651D134007CE

4 Faults Found:
01575 - Control Switched Off
35-00 - -
65535 - Internal Control Module Memory Error
00-00 - -
01777 - Redundant Signal Path from Controls for Vehicle Leveling (E281)
30-00 - Open or Short to Plus
01776 - Control Head for Vehicle Leveling System (E281)
57-10 - Electric Circuit Failure - Intermittent

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 4B0-962-258.lbl
Part No: 4B0 962 258 N
Component: Zentralverrieg.,DWA D37
Coding: 06987
Shop #: WSC 00120
VCID: 346DBA3A047F83B8F54

2 Faults Found:
01370 - Alarm triggered by Interior Monitoring
35-00 - -
00955 - Key 1
09-00 - Adaptation Limit Surpassed

-------------------------------------------------------------------------------
Address 37: Navigation Labels: 4B0-035-192-RNSD-37.lbl
Part No: 4B0 035 192 K
Component: RNS 4.2 H06 BNO 0105
VCID: 254B577EBFA5EA3072A

No fault code found.

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-178.lbl
Part No: 4B0 951 178 A
Component: Innenraumueberw. D04
Coding: 00102
Shop #: WSC 02325
VCID: 26495072C2A3E1287B0

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4Z7-907-357.lbl
Part No: 4Z7 907 357
Component: dynamische LWR D08
Coding: 00030
Shop #: WSC 02325
VCID: 040D2AFA145FF338054

No fault code found.
 
  #2  
Old 07-02-2013, 02:52 PM
1st Gear
Join Date: Jul 2013
Posts: 2
Default reply..

The rear suspension to my 59 plate C4 GP has just failed! Have contacted several garages who have indicated citroen are currently not allowing the air bags to be supplied! The garages have never heard of a manufacturee doing this before. This leavea me with an unusable car sat on my drive I have contacted citroen and asked for a response to this mattee I will also be contacting watchdog and motoring papers etc as there appears to be a major desogn fault with this part and citroen appear to be doing nothing about it. Can i ask that anyone who has or knows of someone with the same problem register it with citroen. This will mean they cant bury their heads and pretend theirs not a problem.

2013 MERCEDES BENZ SL-CLASS
 
  #3  
Old 08-27-2013, 10:31 AM
Join Date: Aug 2013
Posts: 1
Default

i have a 2003 allroad and the front air ride is at 0psi and wont fill sounds like air hissing in front wheel well cant really feel where? Could that be the same problem or is it a bad bag seal i cant see or feel? My car is ripping through axles!
 
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