Circuit/System Description
WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
The transmission range (TR) switch is an integral part of the transmission control module (TCM). The TR switch input/output circuitry consists supply voltage (Vcc), ground (GND), position signal 1 (Pos1), and position signal 2 (Pos2). Each gear range position (P, R, N, D, 4, 3, and 2) corresponds to a particular voltage (1-5 volts) within the TCM.