LINE PRESSURE CONTROL : System Description
SYSTEM DIAGRAM

DESCRIPTION
Highly accurate line pressure control (secondary pressure control) reduces friction for improvement of fuel economy.
Normal Oil Pressure Control
Appropriate line pressure and secondary pressure suitable for driving condition are determined based on the accelerator pedal position, engine speed, primary pulley (input) speed, secondary pulley (output) speed, vehicle speed, input torque, stop lamp switch signal, transmission range switch signal, lock-up signal, power voltage, target shift ratio, oil temperature and oil pressure.
Secondary Pressure Feedback Control
In normal oil pressure control and oil pressure control in shifting, highly accurate secondary pressure is determined by detecting the secondary pressure using a oil pressure sensor and by feedback control.

SHIFT CONTROL : System Description SYSTEM DIAGRAM DESCRIPTION To select the gear ratio that can give the driving force to meet driver's intent or vehicle situation, the vehicle driving con ...
Lock-up control
Lock-up control : system diagram
Lock-up control : system description
The torque converter clutch piston in the torque converter is engaged to
eliminate torque converter slip to
increase power transmission efficiency.
The torque converter clutch control valve operation is controlle ...
Line pressure test
Work Procedure
INSPECTION
Inspect the amount of engine oil. Replenish the engine oil if necessary.
Refer to LU, "Inspection".
Drive for about 10 minutes to warm up the vehicle so that the A/T fluid
temperature is to 50 to 80C (122
to 176F).
Inspect the amount of ATF. Rep ...