Transmision automatica

W1860BE.book Page 82 Tuesday, January 28, 2003 11:01 PM

TRANSMISSION CONTROL MODULE (TCM)
AUTOMATIC TRANSMISSION

13.Transmission Control Module (TCM)
The TCM receives various sensor signals and determines the running conditions of the vehicle. It
then sends control signals to each solenoid according to the preset gearshift characteristic data,
lockup operation data, and transfer clutchtorque data (duty ratios).

A: CONTROL SYSTEM
1. MPT MODELS
Control items
Shifting control

Input signals
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Engine speed rpm
Inhibitor switch

ABS-in-operation control

ABS signal
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Brake switch

Hydraulic oil temperaturecontrol

ATF temperature sensor

Reverse inhibition control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch

Shift pattern (Base/Power) select control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch

Hold control

Inhibitor switch

Grade control

Lockup control

Ordinary shiftcontrol

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Brake switch
Inhibitor switch
Engine speed
Intake manifold pressure

Ordinary lockup control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Engine speed
Inhibitor switch

Smooth control

Throttle position sensor

Hydraulic oil temperature control

ATFtemperature sensor

4AT-82

W1860BE.book Page 83 Tuesday, January 28, 2003 11:01 PM

TRANSMISSION CONTROL MODULE (TCM)
AUTOMATIC TRANSMISSION
Control items
Oil pressure control

Input signals
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Engine speed
Inhibitor switch
ATF temperature sensor

Shifting control

Throttle position sensor
Rear vehicle speedsensor
Front vehicle speed sensor
Engine speed
Torque converter turbine speed sensor
Inhibitor switch
ATF temperature sensor

Starting control

Engine speed
ATF temperature sensor
Inhibitor switch

Learning control

AWD transfer clutch control

Ordinary pressure control

Shift solenoid 1
Shift solenoid 2
Rear vehicle speed sensor
Front vehicle speed sensor
Throttle positionsensor
Torque converter turbine speed sensor
ATF temperature sensor

Ordinary transfer control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch
ATF temperature sensor
FWD switch

1 range control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch

Slip detection control

Throttleposition sensor
Rear vehicle speed sensor
Front vehicle speed sensor

Steering control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor

ABS-in-operation control

ABS signal
Rear vehicle speed sensor
Front vehicle speed sensor
Brake switch

4AT-83

W1860BE.book Page 84 Tuesday, January 28, 2003 11:01 PM

TRANSMISSION CONTROL MODULE (TCM)
AUTOMATICTRANSMISSION

2. VTD MODELS
Control items
Shifting control

Input signals
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Engine speed
Inhibitor switch

ABS-in-operation control

ABS signal
Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Brake switch

Hydraulic oil temperature control

ATF temperature sensor

Reverseinhibition control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch

Shift pattern (Base/Power) select control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Inhibitor switch

Grade control

Lockup control

Ordinary shift control

Throttle position sensor
Rear vehicle speed sensor
Front vehicle...