Passat B7 ABS retrofit on Passat B6 Issues

   #41  

dieseltje

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Well Brake fluid has been changed and the ABS error regarding defective valve did not come back.
But the Follow to Stop issue still is not resolved completely. I have some situations that car not completely stops.
Can this be due to the age and mileage of my car. (430000 km) that my brake booster should be loosing some brake force?
Car slows down to crawling speed and applies brake. At the point that car should stop completely, it some how release the brake and car starts crawling forward. Front Assist warning starts screaming but car will not stop. So I have to stop the car.
any suggustions?
 
   #42  

dieseltje

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This issue is still not solved. In the mean time I turned of the auto resume setting ( adaptation channel 12&13)
After doing this, the follow to stop is functioning halve of the time.

If I want to log to see what signals are good/bad
What channels should I log in the ACC and/or ABS?
 
   #43  

dieseltje

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Well, more then 6 months ferther, but still the same problem. In the meantime, engine has been replace by "fresh" 2010 engine as my oilpump gave up.
But still the follow to stop funciton is not allways stopping completely. When the car in front of me is braking frimly and stops, my follow to stop is working. (higher pressure in system) when the car in front of me is stopping slowly like in trafic jam, the follow to stop is not stopping my car completely. Could this point out that my brakebooster has vacuum leak, so my brake pressure is not high enough?
 
   #44  

dieseltje

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Could this be an brakebooster issue, with a tiny leak, only when engine is ideling or with less rpm, not enough brake pressure ?
 
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Does your brake booster have the G483 Sensor?
 
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sers77

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It´s just a vacuum sensor for brake booster..
Sits behind the battery, in brake booster
But it might be needed for 3AA ABS!?!?
 
   #50  

dieseltje

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Just checked with a friend of me who has Elsa and looks like I don’t have that sensor.
That should also be the case as my adaption channel 061 of my ABS has value 0
 
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   #51  

dieseltje

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But on the otherside, my ABS block came from Passat CC with factors ACC/DSG. As I recall I did not have to change adaption channel 061
 
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