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