Workshop Manual

7A1–10
TRANSMISSION CONTROL SYSTEM (4L30–E)
Functions of Input / Output Components
Components Function
Speed sensor
(fixed to transmission)
Senses rotation of output shaft and feeds the data to Powertrain Control Module
(PCM).
Throttle position sensor
(TPS)
(fixed to engine)
Senses the extent of throttle valve opening and the speed of the throttle valve
lever motion to open the valve. Feeds the data to PCM.
I
N
Brake switch
(fixed to brake pedal)
Senses whether the driver has pressed the brake pedal or not and feeds the
information to PCM.
N
P
U
Mode switch (fixed to
transmission)
Senses the select lever position, and feeds the information to PCM.
U
T
S
Power drive switch
(fixed to front console)
Senses whether the driver has selected the power mode, and feeds the
information to PCM.
S
I
T/M oil temperature sensor Senses the T/M oil temperature and feeds the data to PCM
I
G
N
A
Engine coolant
temperature sensor
Senses the engine coolant temperature, and feeds the data to PCM.
A
L
Engine speed signal Feeds the signals monitoring engine speed to PCM from crank angle sensor.
L
Air conditioning information Senses whether the air conditioner has been switched on or not, and feeds the
information to PCM.
Winter switch (fixed to front
console)
Senses whether the driver has selected the winter mode, and feeds the
information to PCM.
Cruise controller
(Overdrive OFF signal)
Downshift takes place when overdrive OFF signal is received from auto cruise
controller integrated in PCM.
O
U
T
S
Shift solenoid A, B Selects shift point and gear position suited to the vehicle running condition on
the basis of PCM output.
P
U
T
S
O
L
E
Band apply solenoid Controls oil flow suited to the vehicle running condition on the basis of PCM
output.
S
I
G
E
N
O
I
Torque Converter
Clutch PWM solenoid
Controls clutch apply suited to the vehicle running condition on the basis of PCM
output.
G
N
A
L
I
D
Force motor
(Pressure regulator
valve)
Adjusts the oil pump delivery pressure to line pressure suited to the vehicle
running condition on the basis of PCM output.