A common fault on the VW Golf MK4 is that the ASR or ESP Light can show a fault and display warning light on the dashboard after driving for about 10 minutes. This is normally due to a wiring fault. The ASR/ESP module is waiting for a signal for the alternator load and if this isn't found after 10 minutes then the system shows a fault and error code on the dashboard light.
![VW Golf MK4 ESP/ASR Light Fault Warning after 10 minutes VW Golf MK4 ESP/ASR Light Fault Warning after 10 minutes](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpEHb-hBauwA_wOtXkXY8V3Lt-9d5vtSoioHgF610QxlBE6YHeUGkUDaXNHMgOj1CG2JhK-QpDmi0zH-xFhyphenhyphenEI2QzZlKvZ9xpDhu2fX23sj_L5F68hW926asxlSI7k0pUd_oSjONvEh8x1/s280/vw-golf-asr-light-fault0003.JPG) |
VW Golf MK4 ESP/ASR Light Fault Warning after 10 minutes |
The most common place for the wiring to break is just above the gearbox where there is a connector with 4 wires coming from the alternator and disappearing under the battery tray.
![VW Golf MK4 ESP/ASR wiring broken VW Golf MK4 ESP/ASR wiring broken](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtnoBdpd6y0by0vlX65S-yNw6iulhKcSpZHb13WWY4FCai0iBLfKRcTyFbJTE3-9EIfWFtWLyosAHdq1xB3spTckyZfM_w0bb7e64m7TPtDlCdtq0tRzJh3Tukh7zkJzkKszAc13qRgh42/s280/vw-golf-asr-light-fault0006.JPG) |
VW Golf MK4 ESP/ASR wiring broken |
The connector plug has the wires and terminals in it, the part number is 1J0
4 wires come into the connector plug and often break.
The order of the wire ASR socket colours and plug numbers is:
1 - Yellow
2 - Blue
3- Green
4 - Brown