911 Carrera Cabriolet (996) F6-3.4L (1999)
Diagnosis of Throttle Adjustment Device by DLR
Diagnosis of Throttle Body
The purpose of this function is to calibrate the Motronic to the car's throttle body (DV-E). Therefore, a return spring check is performed, so that the
lower mechanical throttle valve limit and mechanical default position are learned.
Return Spring Check
If the return of the throttle valve to it's mechanical default position by means of the return spring is not fast enough a DV-E malfunction is detected (max.
fault) and the system is in the "throttle valve drive default function" state.
Lower Mechanical Limit Check
If a DV-E change is detected and DV-E adaption cannot be performed, the system runs with initialization values. If an adaption caused by tester demand
cannot be performed, the system runs with the old learned values. If, during the first initialization of the ME7, the DV-E adaptation cannot be performed
(lower mechanical limit is out of range) "a lower mechanical throttle valve limit not plausible" is detected and system runs in the "irreversible safety fuel
deactivation" state.
Amplifier Adjustment Check
If the values determined by the gain adjustment are out of the permitted tolerance range the system runs with position control with a non-amplified
potentiometer.
Diagnosis of Throttle Body