Drive Signal

DRIVE SIGNAL
Information about the current gear position, P-N or R-D-1-2-3, is sent from pin 11 in the Transmission Control Module (TCM) connector to the MOTRONIC ECM.

MOTRONIC 2.10.2 (4-cyl) receives the signal on pin 47.

MOTRONIC 2.8.1 (6-cyl) receives the signal on pin 42.

When you go to any one of the R, D, 1, 2, or 3 gear positions from position N, the transmission sends battery positive voltage to pin 11. Otherwise the voltage is 0 V. The intention is to inform the MOTRONIC ECM of the intention to move (forwards or backwards) and that the corresponding gear has been selected. The MOTRONIC ECM carries out idling compensation.

The idling compensation is made possible by the MOTRONIC ECM opening the Idle Air Control (IAC) valve above a normal value and the idling speed can thus be maintained.

If the signal fails to appear, the idling speed will fall below 900 rpm (4-cyl) or 800 rpm (6-cyl) when DRIVE position is selected and then slowly rise to normal idling speed.