Solenoid/Pressure Switch Assembly

DESCRIPTION

Fig. 29:

The solenoid and pressure switch assembly is internal to the transmission and mounted on the valve body assembly (Fig. 29). The assembly consists of six solenoids that control hydraulic pressure to the six friction elements (transmission clutches), and the torque converter clutch. The pressure control solenoid is located on the side of the solenoid and pressure switch assembly. The solenoid assembly also contains five pressure switches that feed information to the TCM.

OPERATION
The solenoids within the assembly are supplied voltage by the Transmission Control Relay. The solenoids are energized when the TCM grounds the return wire for the solenoid that is needed. The pressure switches simply tell the TCM whether or not pressure exists within a clutch circuit.