Check with Tester 9288 (actual values). Store faults as of engine speed = 2800 rpm
1) Pull connector off Tiptronic control unit.
a) Measure resistance between pin 2 and pin 38. Nominal value approx. 1.1 kfi b) Check that pin 2 and pin 38 are free from shorts to ground.
2) Also pull off connector from speed sensor, transmission.
Check for continuity at Tiptronic control unit connector pin 2 to speed sensor connector pin 1
Check for continuity at Tiptronic control unit connector pin 38 to speed sensor connector pin 2
Short to ground pin 2 and pin 38 to pin 7 (ground)
Pin 2 and pin 38 to pin 20 (screening)
Short to positive pin 2 and pin 38 to pin 1 (positive)
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