T-Roc R ACC Problems

[jyoung8607]

The ACC stops working when it slows down, weird is that the fault is related to ESP but in the ABS/ESP module there isnt any fault stored.

Another way the TSK can end up faulted is if the ECU asks the ESP for some friction braking and it doesn't get confirmation that braking is being applied. I strongly suspect that's what's happening here. Not sure of the cause. Could be as simple as the ESP not being coded for ACC, but I would have thought that would fault at startup.

My main point in mentioning the ACC radar SW version was to say this car has definitely been changed from factory. Think about someone screwing around trying to enable SnG on a FtS car or similar, which would also involve ESP. Or maybe this is a used radar from a collision repair.

 

[Vdub]

So now we discover after many posts that the car has been tuned ! Who knows what they did to screwup / upset the ACC system.

The St2 tune was months before the ACC problem and the St1, at the same tuner in 09-2024.. and got the problems after the wrap..

 

[Vdub]

Another way the TSK can end up faulted is if the ECU asks the ESP for some friction braking and it doesn't get confirmation that braking is being applied. I strongly suspect that's what's happening here. Not sure of the cause. Could be as simple as the ESP not being coded for ACC, but I would have thought that would fault at startup.

My main point in mentioning the ACC radar SW version was to say this car has definitely been changed from factory. Think about someone screwing around trying to enable SnG on a FtS car or similar, which would also involve ESP. Or maybe this is a used radar from a collision repair.

The customer is not aware of any damage but he is the second owner in the NL and therefore in Germany one

 

[downtime]

Again, calibrate the radar. TSK, like jyoung already described, is general error in drivetrain components associated to that module and those count in also ACC, ACC buttons etc etc. Not just engine ECU and ABS.

 

[Vdub]

Again, calibrate the radar. TSK, like jyoung already described, is general error in drivetrain components associated to that module and those count in also ACC, ACC buttons etc etc. Not just engine ECU and ABS.

I did calibrate the radar, it completed succesfully but the same problem is still there

 

[downtime]

Ok. Sorry I missed that point.

 

[RGH0]

The St2 tune was months before the ACC problem and the St1, at the same tuner in 09-2024.. and got the problems after the wrap..

Who knows if the condition causing the problem was present but just not observed in those months?. Who knows if the wrap caused a problem that cant be fixed now due to the tune ?

 

[Vdub]

Who knows if the condition causing the problem was present but just not observed in those months?. Who knows if the wrap caused a problem that cant be fixed now due to the tune ?

i can make the car original, that is not a problem