Gear Position Sensor

The gear position sensor is integrated with the transmission control module (TCM) as one unit.

The gear position sensor informs the transmission control module (TCM) on the gear selected, and whether reverse gear is engaged to light the reversing light. The gear position sensor contains a permanent magnet and two linear Hall sensors. The gear position sensor creates a signal voltage of between 0 and 5 V which equates to current gear selector lever position.

The gear position sensor can be diagnosed.

Voltage level for the different gear positions. 

P ≈ 0.65 V

R ≈ 1.64 V

N ≈ 2.12 V

D ≈ 2.62 V