S15/T15 Sonoma P/U 2WD L4-2.2L VIN 4 (1995)
Transmission Position Switch/Sensor: Description and Operation
Trans Range Pressure Switch Assembly
Transmission Range Switch Combination Chart
DESCRIPTION
This device is a set of five pressure switches (two normally closed and three normally open), that detect fluid pressure within the valve body
passages. The five pressure switches are connected to three signal circuits referred to as range signals A, B, C.
The combination of pressure switch states determine the voltage signal (B+ or zero) on each range signal to the Powertrain Control Module
(PCM). These three range signals are then interpreted by the PCM to indicate the transmission range selected. The transmission range fluid
pressure switch assembly contains the trans fluid temperature sensor and attached to the control valve body within the transmission.
