AYC fault

[cardiag]

I have AYC light on after slow driving :confused1:
AYC light is on and after 30 seconds ABS lamp is on :eek:
Problem is that i still not have tactrix cable to see fault in AYC but i found fault code number 33 in ABS : stop lamp SW :blink:
this can be the problem for AYC or not? :unsure:

[GrayW]

If the ABS has a fault the AYC is also effected, as it uses the same sensors.

[NINJA]

I have AYC light on after slow driving :confused1:
AYC light is on and after 30 seconds ABS lamp is on :eek:
Problem is that i still not have tactrix cable to see fault in AYC but i found fault code number 33 in ABS : stop lamp SW :blink:
this can be the problem for AYC or not? :unsure:


look at your switch on your brake pedal,maybe is faulty!:smile:

[cardiag]

look at your switch on your brake pedal,maybe is faulty!:smile:
i just check it in ABS live data and is ok stop lights also work :bored:
Now car is ok and this same is happen for second time before 4-5days :confused1:

[cardiag]

At live data in AYC ECU always is active fault code stop lamp switch but stop lamps is working . Maybe AYC ECU do not have connection for stop lamp sw at pedal .. Where is AYC ECU for E4 to check wires ???

[cardiag]

I found AYC ECU in center console but i need pinout foe evo4

[Mister H]

you can get all the diagrams you need from the MLR Web site.

cheers

[cardiag]

you can get all the diagrams you need from the MLR Web site.

cheers
I found wiring diagrams for ABS and for AYC and in both ECU's i just cut green/green wire for stop lamp switch and again on live data with 2 different tools tactrix and x431 there is status : ON . I dont know what other to do but is very strange . Stop lamp switch just give 12V from battery to both ECU's and wires is removed :bored: If i am sure that AYC is working before this fault appear after ~ 10min driving i will lieave it like that ...