Pressure Control Solenoids

Transmission Electronic Control System

Pressure Control Solenoids

The pressure control solenoids are a Variable Force Solenoid (VFS). The VFS solenoid is an electrohydraulic actuator combining a solenoid and a regulating valve.

The line pressure tap is used to verify output pressure from Pressure Control Solenoid A (PCA) or Pressure Control Solenoid B (PCB) by turning either one off while verifying the output from the other solenoid. The second pressure tap is used to verify the output from the Pressure Control Solenoid C (PCC) solenoid.

There are 3 pressure control solenoids located in the main control valve body used to control line pressure, band and clutch application pressure within the transmission.

The PCM varies the current to the pressure control solenoids.

The PCM has an adaptive learn strategy to electronically control the transmission which will automatically adjust the shift feel. When the battery is disconnected or a new battery is installed, certain transmission operating parameters can be lost. The PCM must relearn these parameters. During this learning process, you may experience slightly firm shifts, delayed or early shifts. This operation is considered normal and will not affect the function of the transmission. Normal operation will return once these parameters are stored by the PCM.