Test Point 29 - Combi-Instrument Input

TEST POINT 29 - Combi-instrument input - Fault code 56

Possible Causes, Elimination, Remarks

No display.

Detectable faults: Open circuit/short to ground, short to positive

1) Turn manual program on and off.
- Check display on instrument

2) Pull off Tiptronic control unit connector. Connect pin 13 to ground.
Display o.k.: Tiptronic control unit faulty

3) Check wiring of Tiptronic control unit pin 13 to combi-instrument connector X4 pin 4.
Wiring o.k. Speedometer faulty