Transmission Control Systems: Description and Operation

OUTLINE
The RE4R01A and RE4R03A automatic transmissions sense vehicle operating conditions through various sensors. They always control the optimum shift position and reduce shifting and lock-up shocks.

A/T CONTROL UNIT FUNCTION
The function of the A/T control unit is to:
- Receive input signals sent from various switches and sensors.
- Determine required line pressure, shifting point, lock-up operation, and engine brake operation.
- Send required output signals to the respective solenoids.




INPUT/OUTPUT SIGNAL OF A/T CONTROL UNIT