*07
Lock-up Control
14-45
PCM
Fail-safe Control
Engine RPM Signal
Engine Coolant
Temperature
Sensor Signal
Barometric Pressure
Sensor Signal
Accelerator Pedal
Position Sensor Signal
Input Shaft
(Mainshaft)
Speed Sensor Signal
Output Shaft
(Countershaft)
Speed Sensor Signal
Lock-up Condition
Learning Control
ATF Temperature
Sensor Signal
A/T Clutch Pressure
Control Solenoid
Valve C
Throttle Position
Sensor Signal (DBW)
Engine Coolant
Temperature Control
Current
Feedback
Shifting Position
Control
Gradient Control
by Magnitude
Lock-up Control
Torque Converter
Clutch Solenoid Valve
Transmission Range
Switch Signal
Lock-up ON/OFF Control
Lock-up Condition
Control
Actual
Driving
Shift
Position
Driving Shift
Position
Information
Correction of
ATF Temperature
Sensor Data
Master Target
of Controlling
Current
The torque converter clutch solenoid valve controls the hydraulic pressure to switch the lock-up shift valve and lock-up
ON and OFF. The PCM actuates the torque converter clutch solenoid valve and the A/T clutch pressure control
solenoid valve ON, the condition of the lock-up starts. A/T clutch pressure control solenoid valve C regulates and
applies the hydraulic pressure to the lock-up control valve to control the amount of lock-up.
The lock-up mechanism operates in the D position (2nd, 3rd, 4th, and 5th), and in the D position D3 driving mode (2nd
and 3rd).
(cont’d)