Quote Originally Posted by MartinsX View Post
I would say ESP warning light comes on because ESP module receives via CAN that ECU has fault code stored. And fault code in ECU is stored because one of those two:
Code:
Address 61: Battery Regul.        Labels: 4F0-910-181.lbl
   Part No SW: 4F0 910 181 E    HW: 4F0 915 181 A
   Component: J0644 BEM       H12 0590  
   Revision: 00000000    Serial number: 00000000137969
   Shop #: WSC 00838 210 00659
   VCID: 23061A6AE2AAD252E0-8076

   Subsystem 1 - Part No: 4F0 915 105 C
   Component: von VA0  0595402080       
   Coding: 344630393135313035432056413030353935343032303830
   Shop #: WSC 12345 123 02022

2 Faults Found:
02254 - Interface to Generator 
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 48
                    Mileage: 216324 km
                    Time Indication: 0
                    Date: 2007.03.20
                    Time: 19:59:02

02479 - Partial Consumer Shut-Off Active 
            000 -  -  - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 7
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 216332 km
                    Time Indication: 0
                    Date: 2007.03.20
                    Time: 20:04:07
I think this:
Code:
02254 - Interface to Generator 
            004 - No Signal/Communication - Intermittent
I suggest to check module 61 itself (they use to have some water ingress) and LIN wire from it to alternator (it use to be damaged in engine compartment area), load test it (disconnected in both ends, of course). If no faults found, repair or replace alternator.
Hello Martin,

I checked the blue wire that comes from alternator to the 61 Module and it didn't have continuity.
I re cable a new wire from alternator to the Module and i receive the same error. (measuring the blue wire it gives me the voltage that the alternator charges 13.8-14v).
I replace also the alternator with a new one but the error still there.

Any other idea from your side?