Throttle Position

THROTTLE POSITION
The MOTRONIC SFI system contains a throttle position sensor which gives information about the opening angle of the throttle. The MOTRONIC ECM distributes a throttle position signal to other systems, like for example the automatic transmission.

The Transmission Control Module (TCM) receives the throttle position signal on pin 12 from pin 57. The signal is a 100 Hz PWM signal, in which the pulse ratio indicates the opening angle of the throttle. The pulse ratio varies from 9% at idling to 92% at wide open throttle.

The TCM uses the throttle position signal to control gear shifting points and the system pressure.