ABS & VDC failure - Alfa Romeo Forum
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(Post Link) post #1 of 10 Old 14-01-19 Thread Starter
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ABS & VDC failure

Hi All,
I'm getting the ABS & VDC failure message and the ASR light stays on, it's an intermittent problem as when I take the car after a couple of days sometimes the problem arise and sometimes it doesn't, my mechanic has tested the sensors and they seem fine so it might be the ABS module, he tells me it's common after a while as he's done quite a lot of them with the same problem, my car has been remapped but i doubt its that got anything to do with that and also have 330 brakes fitted would that have anything to do with it? My car is 16 year's old and m the only owner and always kept it properly maintained but due its age I'm kind of expecting some systems to fail due age but in any case any new information would be handy. thanks

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Check the two midi fuses (the big ones) in the fuse box in top of the battery. This is a classic sympton of one of them having a crack in it. They look fine, but may have a crack which causes the intermittent problem.

https://www.alfaowner.com/#/topics/106658
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Last edited by alfabeat; 14-01-19 at 05:33.
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(Post Link) post #3 of 10 Old 14-01-19 Thread Starter
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Quote:
Originally Posted by alfabeat View Post
Check the two midi fuses (the big ones) in the fuse box in top of the battery. This is a classic sympton of one of them having a crack in it. They look fine, but may have a crack which causes the intermittent problem.

https://www.alfaowner.com/#/topics/106658?page=4
Hi, thanks for that I drove the car tonight and no problem, I checked the fuses and they were dirty with grease(my fault I was greasing the terminals and my mechanic told me do not do that as it can cause problems) so I cleaned them all up no cracks that I can see but I'll have them looked at. I hate intermittent problems.
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Sounds like the park pedal switch may be playing up. My GT V6 did this when I first got it. The switch is behind the brake pedal and just twists out of its mounting. Only costs 10 - 15.
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Worth checking the battery is in good nick.
If it's not giving a good voltage at start-up it can flag up sensor errors.
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All of the above are good suggestions, but I'd add steering angle sensor to the list. They don't generally fail but they can end up being confused after years of the tracking being realigned.

You can reset it in multi ecu scan.

Also, if you have the sat nav unit in your GTA you can pic up the abs sensor readings though it;


Last edited by Chris155; 20-01-19 at 00:35.
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(Post Link) post #7 of 10 Old 30-01-19 Thread Starter
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Hi All,
I've put a used ABS module but I still get the ABS failure and the message I get is C1205 left wheel speed sensor, I'm sending my module to a place in Sydney specialising in Bosch module to see if I can repair it as they are hard to get, my mechanic tested the sensors and they seem ok it's an intermittent problem and it only happens on a very hot day, I still think its the speed sensor on the wheel, driving me nuts, but another question I got my car has had a remap, does the ECU talk to the ABS module or they are compleatly different systems? mind you the place I did the remap is very experienced and did a lot of GTA/GTs and other Alfas wjth no issues, and how hard it is to get a working Module if I can't repair mine, assuming mine is actually broken.
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I recently had the same error. Found that i only get the error after pressing the brake pedal (brake lights working intermittently) its likely to be the pedal switch. If it errors on start up then its could be something more sinister!
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(Post Link) post #9 of 10 Old 4 Weeks Ago
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Hi guys I come here with same problem 156 SW 2002 V6 with VDC, got c1205 - front left sensor, wiring error, changed ABS sensor as what I thought it could damage somehow, but it didn't help much.
The only thing that changed was error is disappearing after shuting off and switiching on car, this didn't happen on old sensor.
After some diagnosis I've done with friend and FES we came up to probably dirty magnetic ring, I came back home and cleaned it didn't help, error stoped disappearing.
Today in morning error disappeared, I went to wash and error popped up after it, lights of traction and abs didn't go out, came back home, shutted off car, switched again to igniton and poof lights went out...
I measured continuity from main connector from ABS controller, this short connection between sensor and controller is ok (sprayed clean also connector on pins) sensor is new, now I am thinking about changing bearing to have new magnetic ring....
any of you have found direct problem?
Also about voltage it doesn't drop below 11V (there's about 11.30 V with igniton on) alternator isn't too good but it holds charging on about 13.7-14.2V (it jumps, got another alternator will be renewing it and then fitting to car)
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(Post Link) post #10 of 10 Old 3 Weeks Ago
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I come with some answers for such problems like C1205 and replacing sensor doesn't change anything and you're sure that ABS ring in bearing is okay.
Answer for such situation is ABS controller and weak connection between main plug and main board (pic) you may try repair it by yourself but it's hard task without proper tools, I destroyed my controller now waiting for new-used one.
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