Continuously Variable Transmission

DESCRIPTION
The electronic control system consists of the Powertrain Control Module (PCM), sensors, three linear solenoids, and a inhibitor solenoid. Shifting is electronically controlled under all conditions.
The PCM is located below the dashboard, behind the kick panel on the driver's side.
The PCM controls the transmission to reduce engine speed and retain the engine's cooling efficiency when the vehicle is driven with full throttle acceleration.
If the vehicle is continuously driven at full throttle acceleration, the PCM regulates the pulley hydraulic pressure to increase the pulley ratio, which, as the result, reduces the engine speed and retains the designed cooling efficiency. After the vehicle has been driven at a lower engine speed for a while, the PCM increases the pulley ratio to the original ratio. For smooth starting in the R position, the PCM sends a signal to the ECM to cut off the NC clutch (if the A/C is on) and increases the engine speed to 900 rpm when the transmission is shifted to the R position.
The start clutch functions to make smooth starting possible. To let the start clutch function properly, the PCM regulates the start clutch hydraulic pressure based on the engine's negative pressure memorized in the N position.

Shift Control Mechanism
Input from various sensors located throughout the vehicle determines which linear solenoid the PCM will activate. Activating the shift control linear solenoid changes the shift control valve pressure, causing the shift valve to move. This pressurizes the drive pulley pressure to the drive pulley and the driven pulley pressure to the driven pulley and changes their effective pulley ratio. Activating the start clutch control linear solenoid moves the start clutch control valve. The start clutch control valve uncovers the port, providing pressure to the start clutch to engage it.