Upshifting is not prevented no manual program

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

2) Check signal with Tester 9288, raising vehicle and rotating right-hand front wheel manually.

3) Check wiring according to wiring diagram.

Check for continuity: Pin 12 Tiptronic control unit connector to ABS control unit connector pin 23

Check pin 12 for short to ground.

Check pin 12 for short to positive.

4) Check signal with oscilloscope (Tiptronic control unit connector pin 12) (Ignition on)

Speed signal

Signal present:

Tiptronic control unit faulty

No signal: ABS faulty

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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