Isuzu KB P190. Manual — part 1025

ON-VEHICLE SERVICE (AW30–40LE) 7A3-15

“L" Position Test

1. While running above 80 km/h (50 mph) in the “D"

position, release your foot from the accelerator
pedal and shift into the “L" position.

Then check to see that the 2

→1 downshift occurs at

the specified point shown on the automatic shift
diagram.

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2. While running in the “L" position, check to see that

there is no upshift to 2nd gear.

3.

While running in the “L" position, release the
accelerator pedal and check the engine braking
effect.

4. Check for abnormal noise during acceleration and

deceleration.

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“R" Position Test

Select into the “R" position and, while starting at full
throttle, check for slipping.

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“P" Position Test

Stop the vehicle on a grade (more than 9%) and after
shifting into the “P" position, release the parking brake.

Then check to see that the parking lock pawl holds the
vehicle in place.

7A3-16 ON-VEHICLE SERVICE (AW30–40LE)

Shift Point Chart and Lock-Up Point Chart

Shift Point Chart

(H2, H4)

(REAR AXLE RATIO: 4.100 / 3.909)

(RADIUS OF TIRE: 0.368 / 0.349m)

“NORMAL" mode

Upshift

km/h (mph)

Position Throttle

Opening

1

→

→

→

→2 2→

→

→

→3 3→

→

→

→4

Fully opened

40 - 46 (25 - 29)

79 - 85 (49 - 53)

122 - 128 (76 - 80)

D

Half throttle

28 - 34 (17 - 21)

53 - 59 (33 - 37)

83 - 89 (52 - 55)

Fully opened

40 - 46 (25 - 29)

79 - 85 (49 - 53)

—

3

Half throttle

28 - 34 (17 - 21)

53 - 59 (33 - 37)

—

Fully opened

40 - 46 (25 - 29)

—

—

2

Half throttle

28 - 34 (17 - 21)

—

—

Downshift

km/h (mph)

Position Throttle

Opening

1

←

←

←

←2 2←

←

←

←3 3←

←

←

←4

Fully opened

33 - 39 (21 - 24)

69 - 75 (43 - 47)

113 - 119 (70 - 74)

Half throttle

8 - 14 (5 - 9)

27 - 33 (17 - 21)

61 - 67 (38 - 42)

D

Fully closed

5 - 11 (3 - 7)

12 - 18 (8 - 11)

22 - 28 (14 - 17)

Fully opened

33 - 39 (21 - 24)

69 - 75 (43 - 47)

—

Half throttle

8 - 14 (5 - 9)

27 - 33 (17 - 21)

—

3

Fully closed

5 - 11 (3 - 7)

12 - 18 (8 - 11)

—

Fully opened

33 - 39 (21 - 24)

83 - 89 (52 - 55)

—

Half throttle

8 - 14 (5 - 9)

83 - 89 (52 - 55)

—

2

Fully closed

5 - 11 (3 - 7)

83 - 89 (52 - 55)

—

L Fully

opened

42 - 48 (26 - 30)

—

—

ON-VEHICLE SERVICE (AW30–40LE) 7A3-17

“POWER" mode

Upshift

km/h (mph)

Position Throttle

Opening

1

→

→

→

→2 2→

→

→

→3 3→

→

→

→4

Fully opened

40 - 46 (25 - 29)

79 - 85 (49 - 53)

122 - 128 (76 - 80)

D

Half throttle

28 - 34 (17 - 21)

63 - 69 (39 - 43)

100 - 106 (62 - 66)

Fully opened

40 - 46 (25 - 29)

79 - 85 (49 - 53)

—

3

Half throttle

28 - 34 (17 - 21)

63 - 69 (39 - 43)

—

Fully opened

40 - 46 (25 - 29)

— —

2

Half throttle

28 - 34 (17 - 21)

— —

Downshift

km/h (mph)

Position Throttle

Opening

1

←

←

←

←2 2←

←

←

←3 3←

←

←

←4

Fully opened

33 - 39 (21 - 24)

70 - 76 (43 - 47)

115 - 121 (71 - 75)

Half throttle

11 - 17 (7 - 11)

36 - 42 (22 - 26)

66 - 72 (41 - 45)

D

Fully closed

5 - 11 (3 - 7)

12 - 18 (8 - 11)

22 - 28 (14 - 17)

Fully opened

33 - 39 (21 - 24)

70 - 76 (43 - 47)

—

Half throttle

11 - 17 (7 - 11)

36 - 42 (22 - 26)

—

3

Fully closed

5 - 11 (3 - 7)

12 - 18 (8 - 11)

—

Fully opened

33 - 39 (21 - 24)

83 - 89 (52 - 55)

—

Half throttle

11 - 17 (7 - 11)

83 - 89 (52 - 55)

—

2

Fully closed

5 - 11 (3 - 7)

83 - 89 (52 - 55)

—

L Fully

opened

42 - 48 (26 - 30)

—

—

“3rd START" mode

km/h (mph)

D position, 3rd START mode ON

→

OFF

32 – 38 (20 – 24)

Lock-Up Point Chart

(H2, H4)

(REAR AXLE RATIO: 4.100 / 3.909)

(RADIUS OF TIRE: 0.368 / 0.349m)

km/h (mph)

Throttle Opening: 20 %

Lock-up ON

Lock-up OFF

Position

A/T Mode

3rd 4th 3rd 4th

NORMAL

64 - 70 (40 - 43)

64 - 70 (40 - 43)

41 - 47 (25 - 29)

59 -65 (37 - 40)

D

POWER

—

71 - 77 (44 - 48)

—

59 - 65 (37 - 40)

7A3-18 ON-VEHICLE SERVICE (AW30–40LE)

Transmission Fluid Level and Condition

Inspection

Park vehicle on level ground and set parking brake.
With the engine idling, move the shift lever through all
positions from “P" to “L", then return to position “P".
Check to see if the level of fluid comes to “HOT" range
of about 75

°°°°C (167°°°°F) on the dipstick gauge.

If the level of fluid is too low, replenish to bring it to
maximum level in “HOT" range.

Inspection of fluid condition. If the ATF is except
normality (refer to the following table) or smells burnt,
try to find these cause and replace it.

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Color or ATF

Condiction

Clear red

Normality

Blackish discoloration

Defects of power train parts (clutches)

White turbidity

Include water

Discoloration of red brown

Deterioration of ATF