Isuzu Trooper (1998-2002 year). Manual - part 703

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–9

MAJOR INPUT/OUTPUT COMPONENTS

Component

Function

Inpu

t

Vehicle speed sensor (Speedometer)

Detects the vehicle speed (Back-up sensor of output 
revolution sensor).

Output revolution sensor (Transmission)

Detects the vehicle speed.

Input revolution sensor (Transmission)

Detects the input revolution (O/D direct clutch drum 
revolution).

Engine revolution sensor

Detects the engine revolution.

Throttle position sensor

Detects the throttle opening rate.

Neutral start switch

Detects the select lever position.

Pattern select switch

Detects whether the driver has selected "NORMAL", 
"POWER", or "WINTER" mode.

Overdrive off switch

Detects whether the driver has selected O/D.

Brake lamp switch

Detects whether the driver has pressed the brake pedal or 
not.

Oil temperature sensor

Detects the oil temperature.

Diagnostic start switch

Starts self-diagnosis and displays a code for faulty part if 
any.

Inp

u

t/O

ut

put

Data link connector

When connected with Tech2 or tester, can communicate 
the data for function check, etc.

Ou

tp

ut

Shift solenoid S1, S2

Selects shift point and gear position suited to the vehicle 
running condition on the basis of TCM output.

Lock-up control solenoid SL

Control the lock-up clutch suited to the vehicle running 
condition on the basis of TCM output.

Pressure control solenoid STH

Adjusts throttle pressure by energizing current of linear 

pressure control solenoid to prevent the shift shock and to 
obtain shift smoothly.

"CHECK TRANS" lamp

When trouble has occurred to throttle position sensor, 
vehicle speed sensor, or solenoid, "CHECK TRANS" lamp 
is blinked to warn the driver. If also displays the trouble 
code.

A/T OIL TEMP warning lamp

Lights when ATF oil temperature rises. (Turned on at 
greater than 146

°

C. Turned off at less than 126

°

C.

Power mode lamp

Informs the driver whether the vehicle is in power mode or 
not.

Winter mode lamp

Informs the driver whether the vehicle is in winter mode or 
not.

Com

put

er

Transmission Control Module (TCM)

Based on the signal from each switch and sensors, judges 
necessary shift point and lock-up operation, and send 
signal to each solenoid.

7A–10

AUTOMATIC TRANSMISSION (AW30-40LE)

LOCATION OF CLUTCH, BRAKE, ONE-WAY CLUTCH AND SOLENOID

C07RY00006

EndOFCallout

Legend

C-0: Overdrive direct clutch
C-1: Forward clutch
C-2: Direct clutch

B-0: Overdrive brake
B-1: Second coast brake
B-2: Second brake
B-3: First and reverse brake

F-0: Overdrive one-way clutch
F-1: One-way clutch (No.1)
F-2: One-way clutch (No.2)

S-1: Shift solenoid S1
S-2: Shift solenoid S2
S-3: Lock-up solenoid SL
S-4: Pressure control solenoid STH

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–11

OPERATION OF CLUTCH, BRAKE AND ONE-WAY CLUTCH 

❍

 :Operating 

:Free at coast down 

:Operating at Lock-up

(1*): Down-shift only in the L range and 2nd

 

gear - no up-shift.

(2*): Down-shift only in the L range and 3rd gear - no up-shift.

SPEED CHANGE AND LOCK-UP PATTERN

If you select a speed range and a lock-up pattern as shown below by specifying respective positions of transmission
shift lever, transfer shift lever and pattern select switch, the transmission control computer controls speed change and
lock-up operations based on the specified pattern in accordance with the degree of throttle opening and vehicle speed.

 

¨

: The lock-up operation is available.

 ( ): Transmission is shifted at high speed to prevent overrun.

Shift lever 

position

Gear position

C-0

C-1

C-2

B-0

B-1

B-2

B-3

F-0

F-1

F-2

S-1

S-2

S-3

P

Parking

❍

❍

R

Reverse

❍

❍

❍

❍

❍

N

Neutral

❍

❍

D

1st

❍

❍

❍

❍

2nd

❍

❍

❍

❍

❍

❍

3rd

❍

❍

❍

❍

❍

❍

O/D

❍

❍

❍

❍

2

1st

❍

❍

❍

❍

2nd

❍

❍

❍

❍

❍

❍

❍

❍

3rd

❍

❍

❍

❍

❍

❍

L

1st

❍

❍

❍

❍

❍

❍

(1*) 2nd

❍

❍

❍

❍

❍

❍

❍

❍

(2*) 3rd

❍

❍

❍

❍

❍

❍

Pattern select sw. 

position

Transmission shift position

D

2

L

Overdrive OFF switch

OFF 

Overdrive OFF switch

 ON 

NORMAL 

POWER

1st

 ⇔

 2nd 

⇔ 

 ⇔ 

1st 

⇔

 2nd 

⇔ 

 ⇐ 

1st

⇔

2nd

⇔

(3rd)

1st

⇐

(2nd)

⇐

(3rd)

WINTER

3rd fixed

─

─

7A–12

AUTOMATIC TRANSMISSION (AW30-40LE)

OVERDRIVE AND LOCK-UP OPERATING CONDITIONS

The overdrive and lock-up clutch operate if the following conditions are satisfied.

 

(1*): 

If transmission oil temperature is more than 130

°

C, lock-up is inhibit.

Overdrive

Lock-up clutch

Transmission shift position

D range

⇐

 (1*)

O/D OFF switch

OFF (O/D OFF lamp OFF)

—

Stop lamp switch

—

OFF

Throttle opening

—

Except fully closed

Vehicle speed

About 49 km/h or more

3rd: About 50 km/h or more

O/D: About 65 km/h or more