Losing esp abs when exceeding 2000 rpm

[ilyes Les]

Hi everyone..
my car is a4 b5 2001, when on road and exceeding approximately 2000 rpm, esp and abs lights come on and stay on.
stopping the vehicle, ignition off... then ignition on, inst-cluster shows "OK"... engine on and running... esp and abs lights back again when over 2000 rpm

Got this fault code when scanning the vehicle...
Address 03: ABS Brakes Labels: 8D0-907-389.LBL
Controller: 8D0 907 389 D
Component: ABS/ESP front D56
Coding: 04255
Shop #: WSC 00000
VCID: 341B9FD31723
2 Faults Found:
01435 - Brake Pressure Sensor 1 (G201)
27-10 - Implausible Signal - Intermittent
18265 - Load Signal: Error Message from ECU
P1857 - 35-10 - - - Intermittent

I did the measuring of the brake pressure with vcds, it measures pressure up to >100 bar when pedal is fully pressed, and it gives -0.33 bar when depressed... is sensor good?

I also checked the pedal switch with vcds measuring block ... the switch seems ok, i mean it shows 000 when, and then 111 when pressed.

when i don't exceed that fxxx 2000 rpm, abs is activated and fully functional.

Any thoughts ?

[ametlib]

Hi,
you are maybe scanning the wrong control unit, check the ECU for faultcodes as it looks like the timing can be retarded

[ilyes Les]

I did check the ecu ... and found this :

Address 01: Engine Labels: 038-906-019-AJM.LBL
Controller: 038 906 019 AN
Component: 1,9l R4 EDC 0000SG 1301
Coding: 00002
Shop #: WSC 63251
VCID: 63B92C8FE24D
1 Fault Found:
17911 - Load Signal from Alternator Term. DF: Implausible Signal
P1503 - 35-00 - -
Readiness: N/A

i then checked alternator voltage with voltmeter and found 14.26v (engine on at 2500rpm)... then 13.94v (radio, headlights, wipers on)..

i noticed however some noise and vibrations due to the serpentine belt.. these get worse when i turn the steering wheel left or right.

[agronni]

Dear ilyes Les please can you help me this problem. I have the same problem but i didn't resolve them anymore. What do you suggest me please.