Gear-shift position sensor

Fig 1: Gear-Shift Position Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The gear-shift position sensor is located inside the transmission housing. It contains a Park / Neutral position (PNP) switch and switches which inform the transmission control module (TCM) about which gear is selected and whether back-up (reverse) gear is selected so that the reversing lamps are lit. The gear-shift position sensor is a position switch which is grounded via the chassis. The combination of pins A, B, C and PA indicate the current gear selector position (see the table in Fig 2). The trailing contacts can either be closed or open. The gear-shift position sensor is not available as a replacement part.

There are diagnostics for the gear-shift position sensor.

Fig 2: Table For Gear-Shift Position Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Table for the gear-shift position sensor 

The value indicates the position of the gear-shift position sensor (A, B, C and PA), see the table in Fig 2.

• = High signal (open)

- = Low signal (grounded)