2007 ISUZU KB P190 Workshop Repair Manual

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Page 4089 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A3-4 ON-VEHICLE SERVICE (AW30–40LE)
Troubleshooting Chart
Numbers are arranged in order of probability.
Perform inspections starting with number one and
working up.

A/T : Automat

Page 4090 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ON-VEHICLE SERVICE (AW30–40LE) 7A3-5

A/T : Automatic Transmission

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Page 4091 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A3-6 ON-VEHICLE SERVICE (AW30–40LE)

A/T : Automatic Transmission

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Page 4092 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ON-VEHICLE SERVICE (AW30–40LE) 7A3-7

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Page 4093 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A3-8 ON-VEHICLE SERVICE (AW30–40LE)

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Page 4094 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ON-VEHICLE SERVICE (AW30–40LE) 7A3-9
Manual Shifting Test
NOTE: W ith this test, it can be determined whether the
trouble lies within the electrical circuit or is a mechanical
problem in the tr

Page 4095 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A3-10 ON-VEHICLE SERVICE (AW30–40LE)
Measure Stall Speed
1. Chock the four wheels.
2. Mount an engine tachometer.
3. Fully apply the parking brake.
4. Step down strongly on the brake

7A3-10 ON-VEHICLE SERVICE (AW30–40LE)
Measure Stall Speed
1. Chock the four wheels.
2. Mount an engine tachometer.
3. Fully apply the parking brake.
4. Step down strongly on the brake pedal with your left foot. (Keep the state until the test is completed)
5. Start the engine.
6. Turn off the A/C.
7. Select into the “D" position. Step all the way down on the accelerator pedal with your right foot. Quickl
y
record the highest speed as soon as the engine
speed gets stabilized.
8. Select into the “N” position and maintain the engine
idling condition more than 1 minute.
Stall speed: 2300 ±
±±
±
200 rpm *
* Ambient temperature to be between roughly 10 °C
(50 °F) and 40 °C (104 °F).
Evaluation
1. If the engine speed is the same for both positions
but lower than the specified value:
• Engine output is insufficient.
• Stator one-way clutch is not operating properly.
NOTE: If more than 600 rpm below the specified value,
the torque converter could be faulty.
2. If the stall speed in “D" position is higher than
specified:
• Line pressure too low
• Forward clutch slipping
• No.2 one-way clutch not operating properly
3. If the stall speed in “R" position is higher than
specified:
• Line pressure too low
• Direct clutch slipping
• No.3 brake slipping
4. If the stall speed in the “R" and “D" positions are
higher than specified:
• Line pressure too low
• Improper fluid level

Time Lag Test

F07RY00003
If the shift lever is shifted while the engine is idling,
there will be a certain time elapse or lag before the
shock can be felt. This is used for checking the
condition of the forward clutch, direct clutch, No.3
brake, and No.2 one-way clutch.
NOTE:
1. Perform the test at normal operating fluid
temperature (50 – 80 °C or 122 – 176 °F)
2. Be sure to allow one minute interval between tests.
3. Make three measurements and take the average value.

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Page 4096 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ON-VEHICLE SERVICE (AW30–40LE) 7A3-11
Measure Time Lag
1. Fully apply the parking brake.
2. Start the engine. Check idling speed (A/C OFF).
3. Operate the select lever from “N" to “D"

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