Circuit Operation

A 5-volt reference voltage is applied on the APS (main) power terminal (terminal No. 2) from the PCM (terminal No. 92). The ground terminal (terminal No. 1) is grounded with PCM (terminal No. 91). When the accelerator pedal is moved from the idle position to the fully opened position, the resistor between the APS (main) output terminal (terminal No. 3) and ground terminal will increase according to the rotation.