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  7. 01400 - Suspension Level Control

01400 - Suspension Level Control

Audi Q7 1 (4L)
Themenstarteram 24. Januar 2020 um 7:48

Hello, I have recently had a problem with my air suspension, I get three error codes, 1577.1400.2250. As soon as I start driving, the yellow light starts flashing. I have VCDS. Can someone help me how I can identify the problem?

In the meanwhile I have read out with VCDS:01577 - Turn-Off due to Over-Temp

001 - Upper Limit Exceeded - Intermittent

Freeze Frame:

Fault Status: 00100001

Fault Priority: 6

Fault Frequency: 1

Reset counter: 59

Mileage: 232898 km

Time Indication: 0

Date: 2020.01.20

Time: 08:12:59

Freeze Frame:

Error Code: 68

-----------------------------------------------

01400 - Suspension Level Control

001 - Upper Limit Exceeded - Intermittent

Freeze Frame:

Fault Status: 00100001

Fault Priority: 2

Fault Frequency: 4

Reset counter: 63

Mileage: 232938 km

Time Indication: 0

Date: 2020.01.21

Time: 17:07:36

Freeze Frame:

Error Code: 66

------------------------------------------

02250 - Function Deactivation; Valve Duty Cycle

001 - Upper Limit Exceeded - Intermittent

Freeze Frame:

Fault Status: 00100001

Fault Priority: 6

Fault Frequency: 4

Reset counter: 63

Mileage: 232933 km

Time Indication: 0

Date: 2020.01.21

Time: 16:57:01

Freeze Frame:

Error Code: 46

Anyone some hints?

Last edited by yofatim; Today at 08:30 AM.

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20 Antworten

Hallo.

Problems with „over temp“ is coming up cause your compressor is not working that effectiv —> dischargevalve get slightly broken—> temp raise over 130 degrees celcius.

Suspension level exceed —> one or more valves to hold min-pressure in the airspring are defect. —> valve duty cicle limit exceeds

Sorry for my rather bad english...

Themenstarteram 24. Januar 2020 um 11:34

Hello, Thanks you for your feedback.

In order to solve the problem, should I replace the compressor?

Or is there a kind of repairkit I can buy to fix the compressor?

Themenstarteram 24. Januar 2020 um 11:38

I add some pictures and logfiles from VCDS

Address 34: Level Control (4L0 910 553 C)

18:40:38 Group 001: General

11.23 V voltage (terminal 15)

11.95 V voltage (terminal 30)

0.0 km/h Vehicle Speed

Term 50 Off Status Terminal 50

18:40:38 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

18:40:38 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

----------------------------------------------------------------------------

Address 34: Level Control (4L0 910 553 C)

18:50:34

105.0 vehicle height front left

108.0 vehicle height front right

163.0 vehicle height rear left

145.0 Vehicle height rear right

7.0°C compressor temperature

0.00 bar pressure sensor

OFF Discharge solenoid valve

OFF pressure accumulator solenoid valve

OFF air spring valve front left

OFF air spring valve front right

OFF air spring valve rear left

OFF air spring valve rear right

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

18:52:23

104.0 vehicle height front left

108.0 vehicle height front right

163.0 vehicle height rear left

OFF air spring valve rear left

0.048 A damper valve flow front left

0.048 A damper valve flow front right

0.048 A damper valve flow rear left

0.048 A damper valve current rear right

-221.38° steering angle sensor (G85)

0.0 damper speed front left

0.0 damper speed rear left

1.0 damper speed rear right

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

18:52:26

105.0 vehicle height front left

108.0 vehicle height front right

162.0 vehicle height rear left

OFF air spring valve rear left

0.048 A damper valve flow front left

0.048 A damper valve flow front right

0.048 A damper valve flow rear left

0.048 A damper valve current rear right

-221.38° steering angle sensor (G85)

-1.0 damper speed front left

0.0 damper speed rear left

-1.0 damper speed rear right

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

18:52:27

105.0 vehicle height front left

108.0 vehicle height front right

163.0 vehicle height rear left

OFF air spring valve rear left

0.064 A damper valve flow front left

0.048 A damper valve flow front right

0.040 A damper valve flow rear left

0.040 A damper valve current rear right

-221.38° steering angle sensor (G85)

0.0 damper speed front left

0.0 damper speed rear left

0.0 damper speed rear right

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: DTCs cleared

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:07:25 Group 023

7.81 bar Pressure

0.0 (no units)

1.0 (no units)

0.0 (no units)

19:07:25 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:07:25 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:07:32 Group 024

672 Count

324 Count

1192 Count

832 Count

19:07:32 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:07:32 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:07:38 Group 025

312 Count

984 Count

84 Count

2620 Count

19:07:38 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:07:38 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:07:43 Group 026

ON

678 /min RPM

Term 15 On

No

19:07:43 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:07:43 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:07:53 Group 028

0.00 V Voltage

13.18 V Voltage

ON

OFF

19:07:53 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:07:53 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:08:16 Group 034

104.0 (no units)

147.0 (no units)

162.0 (no units)

110.0 (no units)

19:08:16 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:08:16 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:08:26 Group 036

6.18 bar Pressure

6.18 bar Pressure

6.18 bar Pressure

6.18 bar Pressure

19:08:26 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:08:26 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:08:34 Group 037

233 Error Code

233 Error Code

Trailer: No

19:08:34 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:08:34 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

 

Address 34: Level Control (4L0 910 553 C)

19:08:37 Group 037

233 Error Code

233 Error Code

Trailer: No

19:08:37 Group 002

Door Closed doors

Lid close tailgate

4.95 V Level Sensor Right Supply Voltage

4.95 V Level Sensor Left Supply Voltage

19:08:37 Group 003

0.00 m/s*2 longitudinal fitting adjustment

0.00 m/s^2 transverse adjustment adjustment

Relay OFF compressor relay value range: Relay ON / Relay OFF

 

First of all i would change the valves on the airsprings. As an VCDS-User you can depressure each airspring to proove it. maybe you can see it where the level of your car is too high. This the seriuos problem.

Sometimes an error „over temp“ is in case of the mileage „normal“. But it shows the compressor is running out of lifetime. Sooner or later. As far as the car levels correct and the error appears not that much it will be not really serious. You understand?

It seems to be the valve on the left rear airspring.

Yes, you can try it and overhaul the compressor.

https://rover.ebay.com/.../0?...

Picture 10 shows the dischargevalve...

https://rover.ebay.com/.../0?...

The right valves...

Themenstarteram 24. Januar 2020 um 13:50

Hello White-head666: when a valve is broken or defective, is there vizual sign? Leakage of oil, or other ?

Themenstarteram 24. Januar 2020 um 13:56

because I think it wil be cheaper if I start with replacing the discharge valves? According to your link: https://rover.ebay.com/.../0?...

they cost 34,79 euros?

I found a movie on the inetrnet, this person have replaced the same? vaalvesn right?

https://youtu.be/gCI-b4F6BZE

 

Then you also mentioned above "It seems to be the valve on the left rear airspring.", can you please explain why you think that?

Themenstarteram 24. Januar 2020 um 16:07

Some additional information, on the picture you can see that te car is quite heigh in the rear. Yesterday I tried to lower the suspension rear left , rear right, front left , front rear with VCDS, but is doesn't work.

Zitat:

@yofatim schrieb am 24. Januar 2020 um 14:50:32 Uhr:

Hello White-head666: when a valve is broken or defective, is there vizual sign? Leakage of oil, or other ?

No

Zitat:

@yofatim schrieb am 24. Januar 2020 um 14:56:02 Uhr:

because I think it wil be cheaper if I start with replacing the discharge valves? According to your link: https://rover.ebay.com/.../0?...

they cost 34,79 euros?

I found a movie on the inetrnet, this person have replaced the same? vaalvesn right?

https://youtu.be/gCI-b4F6BZE

 

Then you also mentioned above "It seems to be the valve on the left rear airspring.", can you please explain why you think that?

Look on your posted VCDS-Picture no. 4. The value „rear left“ is to much. So i would change this first.

Zitat:

@yofatim schrieb am 24. Januar 2020 um 14:56:02 Uhr:

because I think it wil be cheaper if I start with replacing the discharge valves? According to your link: https://rover.ebay.com/.../0?...

they cost 34,79 euros?

I found a movie on the inetrnet, this person have replaced the same? vaalvesn right?

https://youtu.be/gCI-b4F6BZE

 

Then you also mentioned above "It seems to be the valve on the left rear airspring.", can you please explain why you think that?

These are two different problems. The „serious“ Problem is the valve for pressure-hold on the airspring.

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  3. Auto
  4. Audi
  5. Q7 4L & Q8 4M
  6. Q7 4L
  7. 01400 - Suspension Level Control