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Home >> Buick >> 1994 >> Roadmaster Estate Wagon V8-265 4.3L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Sensors and Switches - Computers and Control Systems >> Transmission Position Sensor/Switch >> Description and Operation >> Transmission Range (TR) Pressure Switch Assembly
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Transmission Range (TR) Pressure Switch Assembly

Transmission Range Pressure Switch Assembly Circuit.:





PURPOSE
Five pressure switches are connected to three PCM signal circuits referred to as range signals A, B and C. The combination of pressure switch state determines voltage on each range signal.

The PCM process this information to determine selected range of the transmission.

OPERATION
Five pressure switches, two normally closed and three normally open, detect fluid pressure within the valve body passages. The combination of pressure switch state determines voltage signal, B+ or 0, on each range signal to the PCM.

LOCATION
The Transmission Range (TR) Pressure Switch assembly is attached to the valve body inside the transmission.
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