Lumbar Support

sinlessUK

sinlessUK

Member
Driver side lumbar support has stopped working, was only using it a couple of minutes ago. Connections under seat look ok. Is there a fuse or something? Tried the passenger side and that works fine.

Any ideas appreciated.
 
Is there no noise? You should JUST be able to hear the electric motor spinning.
Try listening to the passenger side first.
If there is a noise ftom the motor then there is no need to check the fuses. The unit would need to be remived to repair / replace it.

Steve B
 
Passenger side ain't working now? But I heard the motors spinning...

Just out of curiosity where's the fuse for these?
 
Forgive me for saying this, but I have to mention it.

The movement on the lumbar support is so small that it is easy to think that it is not working when it is.

So are you 100% sure it is not working?

Steve B
 
Just been out to the car and the passenger side is NOW working and the motor is spinning BUT the drivers side isn't spinning.
I did a VDCS scan and this came up. So I decided to clear it, run the car and hasn't come back. Still no motor spinning on the driver side though.

Address 46: Central Conv. Labels: None
Controller: 8Z0 959 433 AF
Component: Komfortgerát TBD 1210
Coding: 07931
Shop #: WSC 02138
VCID: 8A67A12BA527
1 Fault Found:
00532 - Supply Voltage B+
37-10 - Faulty - Intermittent
 
sinlessUK said:
Just been out to the car and the passenger side is NOW working and the motor is spinning BUT the drivers side isn't spinning.
I did a VDCS scan and this came up. So I decided to clear it, run the car and hasn't come back. Still no motor spinning on the driver side though.

Address 46: Central Conv. Labels: None
Controller: 8Z0 959 433 AF
Component: Komfortgerát TBD 1210
Coding: 07931
Shop #: WSC 02138
VCID: 8A67A12BA527
1 Fault Found:
00532 - Supply Voltage B+
37-10 - Faulty - Intermittent
Click to expand...

I have this code but my lumbar works. ImageUploadedByTapatalk1428246977.728205.jpg
 
Since the lumbar feed is live even with the ignition off I am not sure that the CCCU would play any part in its operation.

Tom (Timmus) would know the answer to this for sure, he has wired Lumbar on several occasions I am sure.

Errors like the ones above can be triggered by disconnecting the battery or running it flat in recent months. So it might be a "Red Herring?"

Steve B
 
Can I disconnect the leads underneath the seat for further investigation without activating the airbag? Don't fancy it going off!
 
Last edited:
sinlessUK said:
Can I disconnect the leads underneath the seat for further investigation with activating the airbag? Don't fancy it going off!
Click to expand...

You will be ok. Just dont switch the ignition on or off when its disconnected as the airbag light will come on and vcds is needed to switch it off
 
Don't disconnect the yellow one, unless you have to, that is the airbag one.

Steve B
 
Hi folks,

I've just read this thread...

The lumbar support fuse is located at the base of the left-hand-side A-pillar. You have to remove the sill trim in order to access it.
At the base of the A-pillar, you'll see a whole raft of connector blocks. Piggybacked onto the connector blocks you're likely to find two fuses. One is large (30A, if I remember correctly) and another is small (10A). The smaller one (10A) is the fuse for lumbar support.
Both seats are protected by the same fuse, so if one seat is working and the other isn't, then the fuse is unlikely to be the problem.

The lumbar support system is an electrical island; it is in no way connected to the CCCU nor the car's diagnostics system.

The lumbar support connectors beneath the seats (red) have 6 pins, of which only two are used. There should be ~12V between the red and brown wires irrespective of whether the ignition is on or off.

All the best,

Tom
 
Last edited:
Thank you timmus, I shall investigate & thank you to everyone else :mad:)

timmus said:
Hi folks,

I've just read this thread...

The lumbar support fuse is located at the base of the left-hand-side A-pillar. You have to remove the sill trim in order to access it.
At the base of the A-pillar, you'll see a whole raft of connector blocks. Piggybacked onto the connector blocks you're likely to find two fuses. One is large (30A, if I remember correctly) and another is small (10A). The smaller one (10A) is the fuse for lumbar support.
Both seats are protected by the same fuse, so if one seat is working and the other isn't, then the fuse is unlikely to be the problem.

The lumbar support system is an electrical island; it is in no way connected to the CCCU nor the car's diagnostics system.

The lumbar support connectors beneath the seats (red) have 6 pins, of which only two are used. There should be ~12V between the red and brown wires irrespective of whether the ignition is on or off.

All the best,

Tom
Click to expand...
 
It is great to have people like Tom on our forum, if he is not sure, then he says so, if he is sure (as he states here and as he normally is) then it removes any doubt!


He is human of course, but his A2 electronics knowledge, in particular, is second to none.

I better stop now or may be accused of being biased!!! (I am not, of course, I am just speaking from first-hand experiences of his work)

Steve B
 
You must log in or register to reply here.
Back
Top