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-   -   ABS/Gear Recognition Signal (https://forum.a8parts.co.uk/showthread.php?t=14740)

David's8 7th February 2019 03:41 PM

ABS/Gear Recognition Signal
 
Last couple of times i have taken the '8 out I have experienced an ABS alarm on the dash when pulling away in a "spirited" fashion. It first occurred when turning left or right onto the road but now occurs when taking off straight ahead. Just scanned the car and VCDS indicates the following:
-----------------------------------
Address 03: ABS Brakes Labels: 8D0-907-389.lbl
Part No: 4D0 907 389 E
Component: ABS/ESP allrad D57
Coding: 08397
Shop #: WSC 02313
VCID: 31620445FBE4C6C269-5102

1 Fault Found:
01119 - Gear Recognition Signal
35-10 - - - Intermittent

---------------
However the Transmission Module says:
Address 02: Auto Trans Labels: 01L-927-156.lbl
Part No: 4D0 927 156 EC
Component: AG5 01L 4.2l5V RdW 1010
Coding: 00111
Shop #: WSC 02314
VCID: 6ED8DF392A5A993A34-50E6

No fault code found.
----------------------------------------------
My first thought was ABS sensor. Any suggestions? (F125 was replaced with pukka unit Nov 2016)

MikkiJayne 7th February 2019 03:56 PM

F125 needs doing again then

Hmm I had another thought - is it down on power when the light comes on? Just wondering if its the brake light switch - that can cause some odd effects, but I can't remember which code it generates. I made a post about solving it in mine and how to adjust it properly but I have no idea which thread it was in :(

steamship 7th February 2019 04:27 PM

Quote:

Originally Posted by David's8 (Post 147981)
My first thought was ABS sensor. Any suggestions? (F125 was replaced with pukka unit Nov 2016)

Had a chat to Neil about something similar a while back, when I mentioned that my D2 had been SORNed since last May. He said that the F125 switch doesn't like sitting around doing nothing, and one he had replaced also caused problems.

David's8 7th February 2019 04:45 PM

Quote:

Originally Posted by steamship (Post 147984)
Had a chat to Neil about something similar a while back, when I mentioned that my D2 had been SORNed since last May. He said that the F125 switch doesn't like sitting around doing nothing, and one he had replaced also caused problems.

That was what I feared as i havent taken it out regularly lately. But, even so, its only been fixed 2 years ago and its a Audi part FFFS and its not exactly been left for months.

PS. Why does the code show up in the ABS module rather than (or as well as) the TCU?

David's8 7th February 2019 04:47 PM

Quote:

Originally Posted by MikkiJayne (Post 147983)
F125 needs doing again then

Hmm I had another thought - is it down on power when the light comes on? Just wondering if its the brake light switch - that can cause some odd effects, but I can't remember which code it generates. I made a post about solving it in mine and how to adjust it properly but I have no idea which thread it was in :(

There's no noticeable loss of power in the slightest.The red symbol appears, flashes/beeps 3 times and then goes off. I do so hope you are wrong MJ.

MikkiJayne 7th February 2019 05:13 PM

The red exclamation mark? That's an odd response. Usually it doesn't care about that code - it happens a lot on some cars when you use tiptronic - never really figured out why, although its probably the F125 on those too. I'd pull it apart and clean up the contacts then spray them with contact grease and bolt it back together. Mine is the original and has been fine since I did that 2 years ago.

I have a couple here that I've been meaning to refurb. I could do one on part ex if you like :D

The brake switch reduces power since it can't tell if you're braking or not so its not that.

Does that code definitely come back each time? Is it also showing the yellow fault light?

moltuae 7th February 2019 06:24 PM

I've just had a dig through my old fault code notes and garage invoices because I've had a number of different ABS faults over the years and that code sounded familiar ...


I have a record of exactly the same fault code, dated September 2013:

Quote:

VAG-COM Version: Release 311.2-N

Control Module Part Number: 4D0 907 389 E
Component and/or Version: ABS/ESP allrad D57
Software Coding: 08397
Work Shop Code: WSC 00640
1 Fault Found:
01119 - Gear Recognition Signal
35-10 - - - Intermittent
The next fault code record I have is from December the same year:
Quote:

VAG-COM Version: Release 311.2-N

Control Module Part Number: 4D0 907 389 E
Component and/or Version: ABS/ESP allrad D57
Software Coding: 08397
Work Shop Code: WSC 00640
3 Faults Found:
01119 - Gear Recognition Signal
35-10 - - - Intermittent
01422 - Hydraulic Pump for Electronic Stability Program (V156)
28-00 - Short to B+
18256 - Please check DTC Memory of Engine Controller
P1848 - 35-10 - - - Intermittent
I'm not 100% sure that the secondary faults were related to the first but, if I remember correctly, I had no work done to rectify the fault between September and December because it was a very intermittent fault initially. The fault got progressively more frequent, to the point that the ABS warning light would come on even on short journeys, which is when I booked it into the garage.

In my case it turned out to be a faulty ABS pump. Hopefully your fault might turn out to be something else David (because a new pump is a tad expensive, IIRC). I'm fairly certain I had no further work done after replacing the pump and that none of the above fault codes returned.

It's possible that some of the fault codes are common to different ABS faults of course and you may experience different symptoms. When my ABS pump started to fail, the symptoms I experienced were similar to that of an iffy ABS sensor, in that it would randomly trigger the ABS light, particularly during braking. Initially it was very infrequent and only after driving for a good 20 minutes or more. Whenever the fault occurred, I could immediately reset the ABS light (by stopping and turning the ignition off-on) and it would usually stay off for another 20mins or more.

David's8 7th February 2019 07:36 PM

Thanks for the comments and suggestions.
It is the large red "Fault in Brake System" (the red circle with "brake pads" and exclamation mark inside) warning that comes on. I've just taken the 8 out again to check a few things out.
1. The warning cuts in on acceleration when the revs hit around 3800/4000 (in Auto) but before it changed down a gear. It happens 8 or 9 times out of 10.
2. It happened less when i switched to Tiptronic - but still did occur 1 in 5 times.
3. There is no yellow fault light.
4. Due to my accelerating runs there were times when I had to brake a tad harshly and i'm not sure that ABS is actually working. A couple of times I locked one or more wheels and there was none of the usual ABS pedal feedback.

Not yet keen to get the F125 removed (I cannot do it on the driveway) and then drill it apart! It shouldn't have failed in two years..... but it does look like it may be the culprit :(

PS. having cleared the DTCs this afternoon I'll check tomorrow what they say after tonight's run..

HPsauce 7th February 2019 07:55 PM

Isn't the big red warning also caused by low brake fluid and won't necessarily generate a code? Time to RTFM?
You could easily have 2 different things going on at the same time, triggered by hard acceleration.

My F125 problems never ever generated any similar warning and only ever once or twice the limp mode, when reversing after a cold start.
My 01119 code has reappeared a couple of times in the last few months, found when doing normal regular scans. No symptoms though.
(And I think my brake pedal switch also needs adjusting a bit more as well...)

David's8 7th February 2019 08:06 PM

Quote:

Originally Posted by HPsauce (Post 147998)
Isn't the big red warning also caused by low brake fluid and won't necessarily generate a code?

......

Yes, low brake fluid will do the same. Will go and check that now +++

OK, Brake fluid is towards minimum but not low enough (I would have thought) to trigger the warning and, besides, but i wouldnt have thought that that would trigger a 01119 Gear recognition code. And, yes I have been reading the handbook :)


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