2007 ISUZU KB P190 lock

7A3-12 ON-VEHICLE SERVICE (AW30–40LE)
Measure Line Pressure
1. Fully apply the parking brake and chock the four
wheels.
2. Start the engine and check idling rpm.
3. Select into “D" position, step down strongly on the brake pedal with your left foot and while
manipulating the accelerator pedal with the right
foot, measure the line pressures at the engine
speeds specified in the table.
4. In the same manner, perform the test in “R" position.


Line pressure kPa (kg/cm
2/psi) Engine
speed “D" position “R" position
Idling 349 – 408
(3.6 – 4.2 /51 – 59) 577 – 675
(5.9 – 6.9/84 – 98)
Stall 1,206 – 1,353
(12.3–13.8/175–196) 1,646 – 1,979
(16.8–20.2/239–287)

Evaluation
1. If the measured values at all positions are higher
than specified:
• Pressure control solenoid defective
• Primary regulator valve defective
2. If the measured values at all positions are lowe
r
than specified:
• Primary regulator valve defective
• Oil pump defective
• Pressure control solenoid defective
3. If pressure is low in “D" position only:
• “D" position circuit fluid leakage
4. If pressure is low in “R" position only:
• “R" position circuit fluid leakage
Road Test
NOTE: Perform the test at normal operating fluid
temperature (50 – 80 °C or 122 – 176 °F).
“D" Position Test in “NORMAL", and
“POWER" Pattern
Select into the “D" position and hold the accelerator
pedal constant at the 50% and 100% throttle valve
opening positions.
Push in one of the pattern selector buttons and check
the following:

1. 1–2, 2–3, 3–OD and lock-up, upshifts should take
place, and shift points should conform to those
shown in the automatic shift diagram.


RTW 77ASH003001



RUA37ASH000101



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ISUZU KB P190 2007

ON-VEHICLE SERVICE (AW30–40LE) 7A3-13
Evaluation
i. If there is no 1→2 upshift:
• Solenoid S2 is stuck
• 1–2 shift valve is stuck
ii. If there is no 2 →3 upshift:
• Solenoid S1 is stuck
• 2–3 shift valve is stuck
iii. If there is no 3 →OD upshift (throttle valve opening
1/2):
• Solenoid S2 is stuck
• 3–OD shift valve is stuck
iv. If the shift point is defective: Refer to TROUBLESHOOTING CHART in this
section.
v. If the lock-up is defective: Refer to TROUBLESHOOTING CHART in this
section.
2. In the same manner, check the shock and slip at the 1→ 2, 2 →3 and 3 →OD upshifts.
NOTE: Drive the vehicle on level ground.
Evaluation
If the shock is excessive:
Refer to TROUBLESHOOTING CHART in this section. 3. Run at “D" position lock-up or OD gear and check fo
r
abnormal noise and vibration.
NOTE: The check for the cause of abnormal noise and
vibration must be made with extreme care as it could
also be due to loss of balance in the propeller shaft,
differential, the torque converter, etc. or insufficient
bending, rigidity, etc. in the power train.




RUW 37ASH000201

4. W hile running in “D" position, 2nd, 3rd gears and
OD, check to see that the possible kick-down
vehicle speed limits for 2 →1, 3 →1, 3 →2, OD →3
and OD →2 kick-downs conform to those indicated
on the automatic shift diagram.




RTW 77ASH003101
5. Check for abnormal shock and slip at kick-down.
6. W hile running in “D" position, OD gear or “lock-up", shift to “2" and “L" positions and check the engine
braking effect at each of these positions.


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ISUZU KB P190 2007

7A3-14 ON-VEHICLE SERVICE (AW30–40LE)
Evaluation
i. If there is no engine braking effect in the “2"
position:
• Second coast (No.1) brake is defective.

ii. If there is no engine braking effect in the “L" position:
• First and reverse (No.3) brake is defective.







RUW 37ASH000301
iii. Also check to see that downshift is made from 3 to
2 or from OD to 3 and then to 2 immediately and
that 2 →1 downshift point is within the limits shown
in the diagram when tested by releasing the
accelerator pedal and operaing into “L" position
while driving in the third gear or in overdrive.




RUW 37ASH000401

“2" Position Test
Select into “2" position and, while driving with the
accelerator pedal held constantly at the specified point
(throttle valve opening 50% and 100%), push in one o
f
the pattern selectors and check on the following points.
1.
At each of the above throttle openings, check to see
that the 1 →2 upshift takes place and that the shift
points conform to those shown on the automatic
shift diagram.
NOTE: There is no OD and no lock-up in the “2"
position.




RTW 77ASH003201
2. W hile running in the “2" position and 2nd gear,
release the accelerator pedal and check the
engine's braking effect.
3. Check for 2 →1 downshift and abnormal noise at
acceleration and deceleration, and for shock at
upshift and downshift.







RUW 37ASH000501


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ISUZU KB P190 2007

ON-VEHICLE SERVICE (AW30–40LE) 7A3-15
“L" Position Test
1. W hile running above 80 km/h (50 mph) in the “D"
position, release your foot from the accelerato
r
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.




RUW 37ASH000601
2. W hile running in the “L" position, check to see that
there is no upshift to 2nd gear.
3. W hile running in the “L" position, release the accelerator pedal and check the engine braking
effect.
4. Check for abnormal noise during acceleration and deceleration.








RUW 37ASH000701

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





RUW 37ASH000801
“P" Position Test
Stop the vehicle on a grade (more than 9%) and afte
r
shifting into the “P" position, release the parking brake.
Then check to see that the parking lock pawl holds the
vehicle in place.



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ISUZU KB P190 2007

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)
— —

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ISUZU KB P190 2007

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 POW ER — 71 - 77 (44 - 48) — 59 - 65 (37 - 40)



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7A3-20 ON-VEHICLE SERVICE (AW30–40LE)
Neutral Start Switch (Mode Switch)
Inspection
W ith a circuit tester, make a continuity test on the
neutral start switch with the moving piece set in each
position.













RTW 77ASH003401
Removal
Preparation:
Disconnect negative (–) battery cable.
1. Remove the rear side ATF cooler pipe from the
transmission elbow.
2. Disconnect neutral start switch connector.
3. Unstake the lock washer, and then remove the shaft
nut.
4. Remove the neutral start switch.
Installation
To install, follow the removal steps in the reverse order,
noting the following points;
If a engine starts at any selector position except “N” o
r
“P”, the neutral start switch (mode switch) should be
adjusted.
1. Loosen the neutral start switch bolt and set the shift
selector to the “N" position.
2. Align the groove and neutral basic line.
3. Hold in position and tighten the bolt and nut.
Torque:
Nut – 7 N ⋅
⋅⋅
⋅
m (0.7 kgf ⋅
⋅⋅
⋅
m/61 Ib ⋅
⋅⋅
⋅
in)
Bolt – 13 N ⋅
⋅⋅
⋅
m (1.3 kgf ⋅
⋅⋅
⋅
m/113 Ib ⋅
⋅⋅
⋅
in)
4. Lock the nut with the lock washer tubs at two points.



RUW 17ASH013601





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7A3-22 ON-VEHICLE SERVICE (AW30–40LE)
Input and Output Revolution Sensor
Inspection
1. Disconnect the input and output revolution sensor
connector.
2. Use an ohmmeter to measure the resistance between terminals 1 and 2.
Standard resistance
Input revolution sensor: 560 – 680
Ω
ΩΩ
Ω (at 20
°
°°
°
Cor
68 °
°°
°
F)
Output revolution sensor: 560 – 680
Ω
ΩΩ
Ω (at 20
°
°°
°
C
or 68 °
°°
°
F)





F07RY00018



Power and 3rd Start Switch
Inspection
1. Block the wheels.
2. Disconnect the negative battery cable.
3. Pry out the switch from the floor console.
4. Disconnect the harness connector.
5. Check continuity between terminals (5) and (6) at third (3rd) position.
6. Check continuity between terminals (3) and (6) at power (PW R) position.
7. Replace the power and 3rd start switch if the result of inspection is abnormal.
8. Connect the harness connector.
9. Connect the negative battery cable.
10. Remove the wheel blocks.
238R300003




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