OVERALL SYSTEM - Control System (Cont'd)
AT-7014spec tableControl System (Cont'd)
TCM FUNCTION
The function of the TCM is to:
Receive input signals sent from various switches and sensors.
Determine required line pressure, shifting point and lock-up operation.
Send required output signals to the respective solenoids.
INPUT/OUTPUT SIGNAL OF TCM
TCM Input/Output Signals
Input
Sensors and solenoid valvesPNP switch
FunctionDetects select lever position and sends a signal to TCM.
Input
Sensors and solenoid valvesThrottle position sensor
FunctionDetects throttle valve position and sends a signal to TCM.
Input
Sensors and solenoid valvesEngine speed signal
FunctionFrom ECM.
Input
Sensors and solenoid valvesCVT fluid temperature sensor
FunctionDetects transmission fluid temperature and sends a signal to TCM.
Input
Sensors and solenoid valvesCVT fluid pressure sensor
FunctionDetects transmission fluid pressure and sends a signal to TCM.
Input
Sensors and solenoid valvesInput pulley speed sensor
FunctionDetects input pulley rpm and sends a signal to TCM.
Input
Sensors and solenoid valvesOutput pulley speed sensor
FunctionDetects output pulley rpm and sends a signal to TCM.
Input
Sensors and solenoid valvesStop lamp switch
FunctionSends a signal to the TCM relaying the operation condition of the brake pedal.
Input
Sensors and solenoid valvesSport mode switch
FunctionSends a signal to the TCM relaying the operation condition of the sport mode switch.
Input
Sensors and solenoid valvesABS control unit
FunctionSends a signal to the TCM operation condition of the ABS.
Input
Sensors and solenoid valvesThrottle position sensor power supply
FunctionDetects power supply voltage of the throttle position sensor.
Input
Sensors and solenoid valvesA/C operating signal
FunctionDetects operation/non-operation of the air conditioner compressor, and performs shift control and lock-up control.
Input
Sensors and solenoid valvesDT 1, 2, 4
FunctionECM communication
Output
Sensors and solenoid valvesLine pressure control solenoid valve
FunctionRegulates (or decreases) line pressure suited to driving conditions in relation to a signal sent from TCM.
Output
Sensors and solenoid valvesShift control solenoid valve
FunctionRegulates shift control pressure, and performs shift control.
Output
Sensors and solenoid valvesClutch switching solenoid valve
FunctionTurns the solenoid ON/OFF to engage/release the lock-up clutch.
Output
Sensors and solenoid valvesClutch pressure control solenoid valve
FunctionControls the slip control valve by a signal sent from TCM to engage and release the forward clutch, reverse brake, and lock-up clutch.
Output
Sensors and solenoid valvesLine pressure control sensor (Power supply)
FunctionSupplies 5V to the line pressure control sensor.
Output
Sensors and solenoid valvesSPORT indicator lamp
FunctionShows TCM faults, when CVT control components malfunction. Show the operation condition of the SPORT mode switch.
Output
Sensors and solenoid valvesDT 3, 5
FunctionECM communication
Output
Sensors and solenoid valvesA/C control signal
FunctionTurns off the Air conditioner compressor, when hard braking