Circuit/System Description

The S126 Drive Mode Select Switch is a normally open switch that closes when the switch is pressed. The K20 Engine Control Module monitors the switch on signal circuit 4108 and the switch receives a constant ground on ground circuit 351. When the drive mode select switch is not pressed, the switch is open and signal voltage observed by the K20 Engine Control Module is high. When the drive mode select switch is pressed, the switch is closed and signal voltage observed by the K20 Engine Control Module is low.