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

Fault, fault code Possible causes, elimination, remarks

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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