Fault overview · General information

911 Carrera (996) Tiptronic diagnosis Fault overview General information -Never pull off or push on the control module connector with the ignition switched on. -Stored faults can be erased only with the Porsche System Tester 2. -Faults may be stored under certain circumstancesif, for troubleshootingpurposes, electrical connections are loosened or disconnectedwith the ignition switched on. -If terminal 15 (pin 54/55) fails, the "Reduceddriving program" will be activated. It is not possible to start diagnosis in this case. -Erase the fault memory with the Porsche System Tester 2 and perform a test drive each time after performing troubleshootingor repairs. During the test drive, drive the vehicle under different loads and at different speeds so that all shift operations(manualand automatic programs) take place at least once. -After the test drive, read out the fault memory with the Porsche System Tester 2. Fault, DTC Possible causes, elimination, notes Test point 1 Faultycontrol module Faulteffect: (short to B+ in supply Reduceddrivingprogram. to solenoid valve/pressure regulatorI relay sticks 1. Check supplywires (pin 52/53) for or cannot pick up) solenoidvalve/pressure regulator DTC 43 for short circuit to B+. If O.K. = Replacecontrolmodule. Test point 2 Faultycontrol module Faulteffect: (watchdog) Reduceddrivingprogram. DTC 44 Replacecontrol module. 37 01 DiagnosisjTroubleshooting, Tiptronic 37 -D 21 Printed in Germany -8, 1998 99637D21