2007 ISUZU KB P190 engine

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-123
Stall Test
Stall Test Procedure1. Fully apply the parking brake and chock all wheels.
2. Check the level of the engine oil, coolant and transmission fluid. Replenish as necessary.
3. Start the engine and warm up (allow engine coolant temperature to reach at least 70 °C
[158 °F]).
Important: Stall test must be finished within 5 seconds.
Prolonged test time may break the transmission.
4. Fully depress the brake pedal with your left foot.
5. Move the selector lever to the D range and fully depress the accelerator pedal. Record the engine
speed as soon as the stall speed.
6. Move the selector lever to the N range and let idle for at least 1 minute.
7. Repeat the stall test (step 4 to 6) in R, 3, 2 and L range.
Standard Value Diagnosis
1. If the stall speed is higher than the standard value in all ranges.
• Low line pressure.
• Abraded oil pump.
• Faulty operation of low clutch.
• Faulty transmission range switch.
• Transmission fluid leaking from the oil pump, valve body or transmission case.
• Sticking of pressure regulator spool valve or pilot spool valve.
2. If the stall speed is higher than the standard value in D, 3, 2 and L ranges.
• Slipping of low clutch
• Slipping of low one-way clutch
3. If the stall speed is higher than the standard value in R range.
• Slipping of low & reverse brake
• Slipping of reverse clutch
4. If the stall speed is lower than the standard value is all ranges.
• Slipping of torque converter one-way clutch
• Problem in engine
Stall speed Pre condition
2050 ± 150 RPM Ambient temperature between 10
and 40 °C [50 and 104 °F]

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-124 TRANSMISSION CONTROL SYSTEM (JR405E)
Time Lag Test
Time Lag Test Procedure1. Fully apply the parking brake and chock all wheels.
2. Check the level of the engine oil, coolant and transmission fluid. Replenish as necessary.
3. Start the engine and warm up (allow engine coolant temperature to reach at least 70 °C
[158 °F]).
Important: Keep the brakes applied at all times in
order to prevent unexpected vehicle motion. Personal
injury may result if the vehicle moves unexpectedly.
4. Let idle and record the time lag from when the selector lever is moved from N to D or N to R range
until the shock has felt.
Standard Value
Diagnosis 1. If the time lag is out of the standard value when the selector lever is moved from N to D range.
• Forward range line pressure is low.
• Slipping of low clutch.
• Slipping of low one-way clutch. • Problem in valve body (faulty operation, sticking or
clogged hydraulic circuit).
• Faulty operation of low clutch solenoid valve.
• Shorter or faulty amount of transmission fluid.
2. If the time lag is out of the standard value when the selector lever is moved from N to R range.
• Reverse range line pressure is low
• Slipping of low & reverse brake
• Slipping of reverse clutch
• Problem in valve body (faulty operation, sticking or clogged hydraulic circuit).
• Faulty operation of low & reverse brake solenoid valve.
• Shorter or faulty amount of transmission fluid.
Selector lever position Time lag
N to D range Less than 0.7 seconds
N to R range Less than 1.2 seconds

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-125
Road Test
Road Test Procedure
*1: Shifting at high vehicle speed, the transmission may
hold the gear position until vehicle speed gets down to
prevent engine overruning.
Notice: Perform this test at the normal transmission
fluid temperature between 50 to 80 °C (122 to 176 °F).
Drive the vehicle on level ground so as not to change to
up slope mode and down slope mode.
1. D range road test in normal and power drive mode. • Select into the D range and hold the accelerator pedal constant at the 50% and 100% accelerator
pedal position.
• 1 to 2, 2 to 3, 3 to 4 upshift and lock up should take place, and shift points should match those shown
in the shift speed chart.
• Also check to see that downshift is made from 4 to 3, 3 to 2 and 2 to 1 point is within the limits shown
in the shift speed chart.
2. 3 range road test in normal and power drive mode. • Select into the 3 range and hold the accelerator pedal constant at the 50% and 100% accelerator
pedal position.
• 1 to 2, 2 to 3 upshift and lock up should take place, and shift points should match those shown in the
shift speed chart.
• While running in the 3 range, does not upshift from 3 to 4.
3. 2 range road test in normal mode. • Select into the 2 range and hold the accelerator
pedal constant at the 50% and 100% accelerator
pedal position.
• 1 to 2 upshift should take place, and shift points should match those shown in the shift speed chart.
• While running in the 2 range, does not upshift from 2 to 3 or 3 to 4, and lock-up does not operate.
4. L range road test in normal mode.
• While running in the L range, does not upshift from 1 to 2, 2 to 3 or 3 to 4, and lock-up does not
operate.
5. R range road test. • Select into the R range and check for slipping.
6. P range road test. • Stop the vehicle on a grade and release the park brake after selecting into the P range. Then check
to see that the parking lock pawl holds the vehicle
in place.
Diagnosis 1. If there is no 1 to 2 upshift.• Faulty operation of 2-4 brake
• Faulty operation of 2-4 brake hydraulic circuits
• Sticking of 2-4 brake solenoid valve
• Refer to symptom diagnosis No. D1: Faulty Gear Shifting or DTC P0731 - P0734 Incorrect Gear
Ratio diagnosis.
2. If there is no 2 to 3 upshift.
• Faulty operation of high clutch
• Faulty operation of high clutch hydraulic circuits
• Sticking of high clutch solenoid valve
• Refer to symptom diagnosis No. D1: Faulty Gear Shifting or DTC P0731 - P0734 Incorrect Gear
Ratio diagnosis.
3. If there is no 3 to 4 upshift.
• Faulty operation of 2-4 brake
• Faulty operation of 2-4 brake hydraulic circuits
• Sticking of 2-4 brake solenoid valve
• Refer to symptom diagnosis No. D1: Faulty Gear Shifting or DTC P0731 - P0734 Incorrect Gear
Ratio diagnosis.
4. If there is no lock up in 2nd, 3rd and 4th. • Faulty operation of torque converter clutch (TCC) piston
• Faulty operation of lock up hydraulic circuit
• Sticking of TCC solenoid valve
• Refer to symptom diagnosis No. I1: No Lock-up
5. If there is no reverse. • Faulty operation of reverse clutch
• Faulty operation of reverse clutch hydraulic circuits
• Faulty operation of low & reverse brake hydraulic circuits
Selector lever
position GearshiftSelected gear
position
P
R
N
D
3
2
L 1st
2nd 3rd4th1st
2nd 3rd
4th(*1) 1st
2nd
3rd(*1) 4th(*1) 1st
2nd(*1) 3rd(*1)4th(*1)
Reverse

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-127
RTW77AXF001001
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Normal mode/ Final gear ratio 41/11 (3.727)/ Tire size 215/70R15 (Euro 3 specification engine)
Power drive mode/ Final gear ratio 41/11(3.727)/ Tire size 215/70R15 (Euro 3 specification engine)
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-128 TRANSMISSION CONTROL SYSTEM (JR405E)
RTW77AXF001101
0
10
20
30
40
50
60
70
80
90
100
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
0
10
20
30
40
50
60
70
80
90
100
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
Normal mode/ Final gear ratio 43/10 (4.300)/ Tire size 245/70R16 (Euro 3 specification engine)
Power drive mode/ Final gear ratio 43/10(4.300)/ Tire size 245/70R16 (Euro 3 specification engine)

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-129
RTW77AXF001201
0
10
20
30
40
50
60
70
80
90
100
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
0
10
20
30
40
50
60
70
80
90
100
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
Normal mode/ Final gear ratio 41/11 (3.727)/ Tire size 215/70R15 (Except Euro 3 specification engine)
Power drive mode/ Final gear ratio 41/11 (3.727)/ Tire size 215/70R15 (Except Euro 3 specification engine)

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-130 TRANSMISSION CONTROL SYSTEM (JR405E)
RTW77AXF001301
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Normal mode/ Final gear ratio 43/10 (4.300)/ Tire size 245/70R16 (Except Euro 3 specification engine)
Power drive mode/ Final gear ratio 43/10(4.300)/ Tire size 245/70R16 (Except Euro 3 specification engine)
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
Accelerator pedal position (%)
Vehicle speed (km/h)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-132 TRANSMISSION CONTROL SYSTEM (JR405E)
Shift Speed Table
Euro 3 specification engine
Final gear ratio & tire size 41/11 (3.727) & 215/70R15
43/10 (4.300) & 245/70R16
Gear Accel.
pedal
position (%) Normal mode
Power drive mode 4L mode
Ve hi c le speed
(km/h) Ve hi c le
speed
(MPH) Output
shaft
speed
(RPM) Vehicle
speed
(km/h) Vehicle
speed
(MPH) Output
shaft
speed
(RPM) Vehicle
speed
(km/h) Vehicle
speed
(MPH) Output
shaft
speed
(RPM)
Upshift 1-2
50 27-34 16-20 930 31-38 19-23 1054 30-37 18-22 1023
100 38-45 23-27 1271 38-45 23-27 1271 34-41 20-25 1147
2-3 50 49-57 29-34 1612 58-66 35-40 1891 55-63 33-38 1798
100 72-80 43-48 2325 72-80 43-48 2325 71-79 43-47 2294
3-4 50 87-96 52-58 2790 97-106 58-64 3099 84-93 50-56 2697
100 113-123 68-74 3595 113-123 68-74 3595 113-123 68-74 3595
Downshift 4-3
0 29-36 17-22 992 29-36 17-22 992 29-36 17-22 992
50 66-74 40-44 2139 74-82 44-49 2387 71-79 43-47 2294
100 108-117 65-70 3440 108-117 65-70 3440 98-107 59-64 3130
3-2 0 6-12 4-7 279 6-12 4-7 279 6-12 4-7 279
50 30-37 18-22 1023 47-55 28-33 1550 45-53 27-32 1488
100 67-75 40-45 2170 67-75 40-45 2170 59-67 35-40 1922
2-1 0 6-12 4-7 279 6-12 4-7 279 6-12 4-7 279
50 10-16 6-10 403 19-26 11-16 682 18-25 11-15 651
100 29-36 17-22 992 29-36 17-22 992 27-34 16-20 930

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007