Fault, DTC Possible causes, elimination, notes · Test point 24

911 Carrera (996) Tiptronic diagnosis Fault, DTC Possible causes, elimination, notes Test point 24 Manual program switch Faulteffect: Short to ground No manual program, DTC 51 Note The manualprogram switch can be checked with the Porsche System Tester 2 (Input signals/Manualprogram switch). 1. Check switch with the tester. 2. Check whether ground is connectedto control module connector pin 13. Nominalvalue: In the automatic gate = 00.Q In the manualgate = 0 ...5 .Q If display is OK = Control module faulty. 3. Check wire from control module connector pin 13 to the manual switch for short to ground. Test point 25 Transmission temperature Faulteffect: sensor Reduceddriving program. Open circuiVshort to B+ Substitutevalue of 80 °C for ATF temperature. DTC 37 No activation of the coolant switchover valve (transmissionalways cooled). Notes The ATF temperature can be checked with the Porsche System Tester 2 (ActualvaluesjTransmissiontemp.). -A fault is stored if an ATF temperature outside the limit range below -50 °C or above + 180 °C is detected. 37 01 DiagnosisjTroubleshooting, Tiptronic 37 -D 39 Printed in Germany -8, 1998 99637D21