Isuzu Trooper (1998-2002 year). Service manual — part 718

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–69

SHIFT POINT CHART AND LOCK-UP POINT CHART

SHIFT POINT CHART

(H2, H4)
(REAR AXLE RATIO: 4.300)
(RADIUS OF TIRE: 0.363m)

“NORMAL” mode

Up shift

km/h

Down shift

km/h

“POWER” mode

Up shift

km/h

Down shift

km/h

Range

Throttle Opening

1

⇒

2

2

⇒

3

3

⇒

4

D

Fully opened

39 - 45

78 - 84

128 - 134

Half throttle

22 - 28

48 - 54

89 - 95

2

Fully opened

39 - 45

89 - 95

—

Half throttle

22 - 28

89 - 95

—

Range

Throttle Opening

1

⇐

2

2

⇐

3

3

⇐

4

D

Fully opened

30 - 36

65 - 71

115 - 121

Half throttle

9 - 15

27 - 33

64 - 70

Fully closed

9 - 15

22 - 28

37 - 43

2

Fully opened

30 - 36

85 - 91

—

Half throttle

9 - 15

85 - 91

—

Fully closed

9 - 15

85 - 91

—

L

Fully opened

43 - 49

85 - 91

—

Half throttle

43 - 49

85 - 91

—

Fully closed

43 - 49

85 - 91

—

Range

Throttle Opening

1

⇒

2

2

⇒

3

3

⇒

4

D

Fully opened

39 - 45

78 - 84

128 - 134

Half throttle

29 - 35

58 - 64

89 - 95

2

Fully opened

39 - 45

89 - 95

—

Half throttle

22 - 28

89 - 95

—

Range

Throttle Opening

1

⇐

2

2

⇐

3

3

⇐

4

D

Fully opened

30 - 36

65 - 71

115 - 121

Half throttle

11 - 17

45 - 51

74 - 80

Fully closed

9 - 15

22 - 28

37 - 43

2

Fully opened

30 - 36

85 - 91

—

Half throttle

9 - 15

85 - 91

—

Fully closed

9 - 15

85 - 91

—

L

Fully opened

43 - 49

85 - 91

—

Half throttle

43 - 49

85 - 91

—

Fully closed

43 - 49

85 - 91

—

7A–70

AUTOMATIC TRANSMISSION (AW30-40LE)

LOCK-UP POINT CHART

(H2, H4)
(REAR AXLE RATIO: 4.300)
(RADIUS OF TIRE: 0.363m)

km/h

Range

A/T Mode

Throttle Opening : 20%

Lock-up ON

Lock-up OFF

3rd

4th

3rd

4th

D

NORMAL

47 - 53

62 - 68

45 - 51

55 - 61

POWER

47 - 53

66 - 72

45 - 51

55 - 61

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–71

826RY00017

TCM VOLTAGE CHECK

TCM voltage check is done to check for transmission and
transmission control module (TCM) problems which cannot be
detected by self-diagnosis.
Additionally, it serves as a back-up check for self-diagnosis.
Measure the voltage drop and make a continuity test for each
of the sensors, solenoids, and switches.
If the voltage is within the specified range and continuity exists,
that particular area of the TCM and automatic transmission
assembly is normal.
If voltage deviation or lack of continuity is discovered,
disconnect the applicable parts and check each of them
individually.
This will allow you to determine the trouble location (TCM,
automatic transmission unit, or another area of the vehicle).

Inspection Tool
Use a circuit tester to measure voltage and circuit continuity.
Insert the test probes from the connector wiring side. TCM
terminals are extremely small.
Wrap a piece of thin wire around the probe of tester.
This will make measurement easier.

TCM Voltage Check Procedure

1. Remove the TCM.

2. Turn the ignition switch on. Do not start the engine.

3. Measure the voltage at the terminal. Refer to

the following

table for the specified voltage ranges.

7A–72

AUTOMATIC TRANSMISSION (AW30-40LE)

TCM STANDARD VOLTAGE

Check circuit

Terminal

Measuring condition

Voltage (V)

+

-

Throttle position sensor

C79-6

C79-28

Throttle fully opened (WOT)

3.47

∼

4.56

Throttle fully closed (idling)

0.25

∼

0.45

C79-19

C79-18

Key switch ON

4.75

∼

5.25

Output revolution sensor

C79-4

C79-16

Engine idling in gear

0

∼

3

Input revolution sensor

C79-5

C79-17

Engine idling

0

∼

3

Speed meter sensor

C79-7

C78-15

or -19

Vehicle speed 10

∼

20 km/h

Less than 1.4

⇔

about 5

Brake switch

C78-18

C78-15

or -19

Depress brake

7

∼

16

Release brake

Less than 1

O/D OFF switch

C79-3

C78-15

or -19

O/D OFF switch ON (O/D OFF)

7

∼

16

O/D OFF switch OFF (O/D ON)

Less than 1

Neutral start switch

C79-2

C78-15

or -19

Selector “P” range

7

∼

16

(P)

Selector all ranges except “P”

Less than 1

Neutral start switch

C79-1

C78-15

or -19

Selector “R” range

7

∼

16

(R)

Selector all ranges except “R”

Less than 1

Neutral start switch

C79-9

C78-15

or -19

Selector “N” range

7

∼

16

(N)

Selector all ranges except “N”

Less than 1

Neutral start switch

C79-8

C78-15

or -19

Selector “D” range

7

∼

16

(D)

Selector all ranges except “D”

Less than 1

Neutral start switch

C79-21

C78-15

or -19

Selector “2” range

7

∼

16

(2)

Selector all ranges except “2”

Less than 1

Neutral start switch

C79-20

C78-15

or -19

Selector “L” range

7

∼

16

(L)

Selector all ranges except “L”

Less than 1

Engine revolution signal

C79-15

C78-15

or -19

Engine idling

Less than 1.4

⇔

9

∼

16

Diagnosis terminal

C79-24

C78-15

or -19

Self-diagnosis ON

0

∼

1.5

Power pattern switch

C79-23

C78-15

or -19

Power pattern switch OFF (NORMAL)

8

∼

16

Power pattern switch ON (POWER)

Less than 1.4

Winter select switch

C79-13

C78-15

or -19

Switch OFF

8

∼

16

Switch ON

Less than 1.4

Electrical source (Battery)

C78-13

C78-15

or -19

—

9

∼

16

Electrical source (Ignition)

C78-20

C78-15

or -19

Key switch ON

9

∼

16

Oil temperature warning lamp

C79-11

C78-15

or -19

Oil temperature warning lamp ON

Less than 1

Oil temperature warning lamp OFF

8

∼

16

“CHECK TRANS lamp”

C79-10

C78-15

or -19

“CHECK TRANS” lamp ON

Less than 1

“CHECK TRANS” lamp OFF

8

∼

16

Power lamp

C79-22

C78-15

or -19

Power lamp ON

Less than 1

Power lamp OFF

8

∼

16