Fault, DTC Possible causes, elimination, notes · Test point 8

911 Carrera (996) Tiptronic diagnosis Fault, DTC Possible causes, elimination, notes Test point 8 Speed signal Faulteffect: front right;left No manual program. Signal implausible Upshiftingis not prevented during braking. DTC's 55, 62 No downshiftingduring braking. Substitutevalue for transverse acceleration. Note The wheel speeds can be checked with Porsche System Tester 2 (Actualvalues/Speedsignal FR/FL). To do this, raise the vehicle and spin the right or left front wheel by hand. 1. Checkwheelspeedwiththe tester. 2. Read out fault memory of the ABS/TC control module and remedy the fault according to the ABS test plan. 3. Check wiring from the Tiptronic control module connector pin 38 (or 39) to the ABSjTC control module connector pin 25 (or 26) for open circuit, short to ground and short to B+. 15 20 31 27 19 16 ABS/TC control module connector 540_96 37 01 DiagnosisjTroubleshooting, Tiptronic 37 -D 25 Printed in Germany. 8, 1998 99637D21