Electronic Control System
Electronic Control System
The electronic control system consists of the Transmission Control module (TCM), sensors, a linear solenoid and 4
solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under and conditions.
The TCM is located on the insulator center bulkhead, behind the driver’s seat.
Shift control
Shifting is related to engine torque through the linear solenoid used to operate throttle valve B which is controlled by the
TCM.
Getting a signal from each sensor, the TCM detects the appropriate gear shifting and activates shift control solenoid
valves A and/or B.
The combination of driving signals to shift control solenoid valves A and B is shown in the table below.
Lock-up control
From sensor input signals, the TCM detects whether to turn the lock-up ON or OFF and activates lock-up control solenoid
valve A and/or B accordingly.
The combination of driving signals to lock-up control solenoid valves A and B is shown in the table below.
(cont’d)
Electronic Control System
The electronic control system consists of the Transmission Control module (TCM), sensors, a linear solenoid and 4
solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under and conditions.
The TCM is located on the insulator center bulkhead, behind the driver’s seat.
Shift control
Shifting is related to engine torque through the linear solenoid used to operate throttle valve B which is controlled by the
TCM.
Getting a signal from each sensor, the TCM detects the appropriate gear shifting and activates shift control solenoid
valves A and/or B.
The combination of driving signals to shift control solenoid valves A and B is shown in the table below.
Lock-up control
From sensor input signals, the TCM detects whether to turn the lock-up ON or OFF and activates lock-up control solenoid
valve A and/or B accordingly.
The combination of driving signals to lock-up control solenoid valves A and B is shown in the table below.
(cont’d)
Description
Electronic Control System (cont’d)
TRANSMISSION CONTROL MODULE (TCM)
ENGINE
CONTROL
MODULE
(ECM)
Shift Control
Lock-up
Control
TCS Control Unit
EPS Control Unit
Engine RPM
Air Conditioning Signal
Brake Switch Signal
Vehicle Speed Sensor Signal
Mainshaft Speed
Sensor Signal
Countershaft Speed
Sensor Signal
Self-Diagnosis
Function
Self-Diagnosis Indicator
INTERLOCK
CONTROL UNIT
Lock-up Control Solenoid
Valve B
Lock-up Control Solenoid
Valve A
Shift Control Solenoid
Valve B
Shift Control Solenoid
Valve A
Linear SolenoidThrottle Position
Sensor Signal
Engine Coolant
Temperature
Sensor Signal
Accet Pedal
Angle Signal
Service Check
Connector