ACC error

[Daz Auto]

A girl at my work bought a nearly new Mk7 GT. She has had a lot of problems with her car. It turns out it was the ACC. The strange thing is the errors were not recorded by car. She did not buy locally and every time she took it to the dealer she bought it from, they could not find an error. I think she said 4 visits 70-80 miles away. So she started taking it to her local dealer when the error happened. Eventually, they detected an ACC error and said the unit was faulty and needed replaced. However, they said that they could not do it under warranty as the car was not bought there! So the matter is now with VW UK. As the car is still under warranty.

This all seems very strange. Does anyone know if the ECU can be set with the VCDS not to record errors?

[monkeyhanger]

Every instance of error was recorded, and in each case it was as though the sensor's field of view was obscured.

The local dealership were saying it isn't a warranty job, but the fact they confirmed it hadn't been working at multiple times and it has no physical damage says it is faulty or wasn't calibrated properly.

The rival dealership group to where I bought the car is closer to home and they're going to do a "non-warranty job" out of their own pocket to calibrate it seems ridiculously generous to me.

Seems that fixing the ACC unit to maintain proper operation of it is a warranty minefield.

[isleaiw]

A girl at my work bought a nearly new Mk7 GT. She has had a lot of problems with her car. It turns out it was the ACC. The strange thing is the errors were not recorded by car. She did not buy locally and every time she took it to the dealer she bought it from, they could not find an error. I think she said 4 visits 70-80 miles away. So she started taking it to her local dealer when the error happened. Eventually, they detected an ACC error and said the unit was faulty and needed replaced. However, they said that they could not do it under warranty as the car was not bought there! So the matter is now with VW UK. As the car is still under warranty.

This all seems very strange. Does anyone know if the ECU can be set with the VCDS not to record errors?

I've had some issues with ACC on my GTi although it is working properly currently, and both times I have been to different dealers they have said that any work wont be covered by warranty as the device needs all 4 wheels to be in perfect alignment and if it is not (and with the state of the roads that is unlikely) it becomes wear and tear not warranty....

No matter what I said they were not moving on that point so i told them its my last VW and I'd be going back to BMW.... and needless to say, it wont be getting fixed before it is part ex'd (although it seems to have fixed itself to help the dealers out!)

Ian

[monkeyhanger]

My warning came up again, same place as it has happened 2/3 of the time - exiting the Tyne Tunnel Northbound - a long sweeping left bend, around 1/2 a mile long. Will be interesting to see if Benfield manage to fix it with their "goodwill" on Friday as my holiday from work has been approved.

Mine has not worked properly since day 1 - the lack of <car>!<car> warning when tailgating other cars and lack of false alerts compared to the GTD is the giveaway.

I don't make a habit of tailgating as I try to avoid stone chip, but suspecting it wasn't working properly, I have tried to instigate the warning.

If VW can avoid fixing an item on the car that isn't working properly, without demonstrating misuse like kerbed wheels that could cause wheel misalignment then what else can they wriggle out of?

I suspect that isleaiw's dealership  is one of these ultra-cautious outfits that is in perpetual fear of doing work VW won't reimburse them for, usually without foundation. Had a similar issue years ago when Benfield wouldn't touch whitewormed alloys even though there was no scuffing or chipping - Pulman replaced them straight away.

[isleaiw]

I suspect that isleaiw's dealership  is one of these ultra-cautious outfits that is in perpetual fear of doing work VW won't reimburse them for, usually without foundation. Had a similar issue years ago when Benfield wouldn't touch whitewormed alloys even though there was no scuffing or chipping - Pulman replaced them straight away.

I suspect that you are right - although two different dealerships that belong to different national chains (JCT and Vertu) would suggest its a theme rather than a one off. My brother is a service manager and has grown up at main dealer franchises and he said he would have sorted it and claimed unless there was a specific reason (like a bulletin or prior irrecoverability) to suggest otherwise

Ian

[KyleB]

Mine has not worked properly since day 1 - the lack of <car>!<car> warning when tailgating other cars and lack of false alerts compared to the GTD is the giveaway.

Matt,

You sure this feature is turned on? I deactivated mine in my GTD, think it was in the MFD menus, something to do with ACC, can't remember off the top of my head. Wondering if maybe yours has been turned off by the dealer and that is why you're not getting the logo?

[monkeyhanger]

Mine has not worked properly since day 1 - the lack of <car>!<car> warning when tailgating other cars and lack of false alerts compared to the GTD is the giveaway.

Matt,

You sure this feature is turned on? I deactivated mine in my GTD, think it was in the MFD menus, something to do with ACC, can't remember off the top of my head. Wondering if maybe yours has been turned off by the dealer and that is why you're not getting the logo?

Kyle,

Definitely switched on. I sometimes get the <car>!<car> and red alerts, but probably 1/4 of the time I would've done in the GTD when driving the same way. I have tried narrowing and extending the intervention distance but it makes no odds. The warning to say the ACC sensor wasn't working yet again on the way home - long sweeping bend and low speed.

[DougL]

I have never had that warning, or anything similar in my GTI either. I frequently get the tailgating sign, but then I live in Northern Ireland, where we have, quite possibly, the worst drivers in the world. No one seems to realise that Lane 2 is purely for overtaking and you will quite often find someone sitting there, despite there being nothing else for miles around. When you do approach from behind, all that seems to happen is that they slow down. <rolls-eyes>

No-one seems to know that they have an indicator either and if you are following, the only sign that they are about to turn is a gradual loss of speed with engine braking, followed by a last-minute flicker of the brake-lights, then a bit of a veer in the opposite direction to an anticipated turn, finalised by sudden opposite lock into said turning. 

[fredgroves]

On my way to my client today, through some 50mph average speed camera motorway roadworks, ACC on...... I get a BONG, followed by an orange cruise control light on the MFD and the message "ACC: no clear view" and "ACC deactivated".

What did I think the problem was?

A road sweeper had pulled out of the site entrance, in front of me, did several hundred metres, screwed my ACC up, then drove into the roadworks and disappeared.

About 2 minutes later, error light goes out, ACC is fine.

I keep saying its jamming and its definitely some sort of radar unit on those road sweepers...

[monkeyhanger]

Hopefully i'll get my fix tomorrow morning - and hopefully the car will see what's in front of it a little more often and not throw up that error. The error came up again tonight, well after i'd passed the toll barrier at the Tyne tunnel.