ISUZU KB P190 2007 Workshop Repair Manual

TRANSFER CONTROL SYSTEM 7D1-37

4JA1-T
Sheet 1/2







RTW 78AXF008901

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7D1-38 TRANSFER CONTROL SYSTEM

4JA1-T
Sheet 2/2










RTW 78AXF009001

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ISUZU KB P190 2007

TRANSFER CONTROL SYSTEM 7D1-39

HFV6 (LHD)

RTW 78AXF012701

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7D1-40 TRANSFER CONTROL SYSTEM

4JH1-TC


RTW 78AXF006901

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TRANSFER CONTROL SYSTEM 7D1-41
CONNECTOR LIST
No. Connector face No. Connector face
B13



White
Fan switch B85



W eld splice 7 (Ground)
B23


White
Meter-A B95



White

Keyless entry control unit
B24


White
Meter-B B96



Gray PIM1
B54


White
J/B I2 B97



WhitePIM2
B56


White
J/B I4 C2



SilverEngine room-RH ground
B62


White
Ignition switch (IGSUB: G1) C4



Sky blueFront wiper motor
B63


White
Ignition switch (IGSUB: G2) C5

~
C14 NOT USED
B64




W eld splice 1 (Illumination) C36



SilverEngine room-LH; ground
B65



W eld splice 2 (Ground) C56
(C24SE)

ECM
B66


White
4 ×4 switch C56
(4JH1-TC)


Black
ECM-A


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ISUZU KB P190 2007

7D1-42 TRANSFER CONTROL SYSTEM

No. Connector face No. Connector face
C56
(HFV6)

Black
ECM-A C107



WhiteJ/B E2
C57


Black ECM-B C108



WhiteJ/B E1
C58


Black ECM J2 C109



SilverBody-CTR; ground
C67


Black
EHCU C111



BlackTransfer case control module
C77


White
Clutch switch C112



BlackTransfer case control module
C94


White
TCM-A (AW 30-40LE) C118




A/C Resister & Neutral switch
C94


Gray
TCM-A (JR405E) C134



Gray Sof actuator
C95


White
TCM-B (AW 30-40LE) E6



Injector pump
C95


White
TCM-B (JR405E) E10



SilverEngine ground
C106


NOT USED E11


Natural green
Neutral switch


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ISUZU KB P190 2007

TRANSFER CONTROL SYSTEM 7D1-43

No. Connector face No. Connector face
E12


Natural green
Neutral switch E78

~
E80 NOT USED
E35



Black
Motor actuator E96



BlackReverse switch
E36



TACHO sensor E110



BrownBackup light switch
E42

Natural green
Backup light switch E111



BrownNeutral switch
E43

Natural green
Backup light switch E116



Backup light switch
E44


Black
Vehicle speed sensor F5



Gray Rear combination light-RH
E45


Gray
2W D-4W D switch F6



BlackRear combination light-LH
E46


Brown
H-L neutral switch H3
(HFV6
4JH1-TC)

Gray
GBattery (+) ~ Engine room
E51


Gray
Inhibiter switch (AW 30-40LE) H4
(HFV6)
(C24SE)
WhiteEngine room ~ Mission
E51


Black
Inhibitor switch (JR405E) H4
(4JH1-TC)


White
Engine ~ Engine room


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ISUZU KB P190 2007

7D1-44 TRANSFER CONTROL SYSTEM

No. Connector face No. Connector face
H4
(4JJ1-TC)


White
Engine ~ Engine room H23
(4JA1-L)

WhiteEngine room B ~ T/misson
H5
(HFV6
4JH1-TC)

White
Engine room ~ Mission H27



NOT USED
H5
(4JJ1-TC
4JA1-L)


White
Engine ~ Engine room H29
(C24SE)

Battery (+) ~ Engine room
H6


White
Engine room ~ INST H32
(C24SE)

Engine room ~ Rear body
H7


White
Engine room ~ INST H48



WhiteEngine room ~ INST
H7
(4JJ1-TC)


White
Engine room ~ INST H50



Engine & Mission ~
H15
(HFV6
4JH1-TC)

Black
Engine room ~ Chassis M26
(C24SE)

Brown2W D-4W D switch
H15
(
4JJ1-TC,
4JA1-L)
Black
Engine room ~ Chassis M27
(C24SE)

BrownHead leveling neutral switch
H18


White
Engine room ~ INST P1



SilverBattery (+)
H23


White
Engine ~ Engine room B P2



SilverRelay & Fuse box


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TRANSFER CONTROL SYSTEM 7D1-45

No. Connector face No. Connector face
P5



Silver
Battery (-)

P6



Silver
Body earth (Ground)

P7




Battery (ALT)

P10



Silver
Engine ground

P11



Silver
Fuse & relay box

P13



Gray
Shift on the fly actuator

R14



Black
2W D-4W D control unit

R15



Black
2W D-4W D control unit

X12



Black
ECM main relay





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ISUZU KB P190 2007

7D1-46 TRANSFER CONTROL SYSTEM
Diagnosis
Before determining a trouble (Non-trouble mode)
1. When shifting from 2H to 4H:
1-1-1 When the flashing frequency of the 4WD indicator is changed from 2Hz to 4Hz (Shift on the fly) If the load is too large to shift the gears synchronously, the operation is repeated up to 3 times. If the shifting
is not effected after being repeated 3 times, the indicator frequency is changed from 2Hz to 4Hz. At the same
time, the actuator condition is changed to 2H, indicator flashes at 4Hz for 10 seconds, and then goes out.
Cause of excessive synchronous shifting load
• Extremely low temperature (the oil viscosity of the front differential increases requiring a large load for
synchronization).
• High speed (since the difference of relative revolutions of gears to be shifted synchronously is too large,
required work load per unit time becomes larger).
Step 1-1-1:
Stop the vehicle or decrease the speed and operate as required again.
1-1-2 When the flashing frequency of the 4WD indicator is changed from 2Hz to 4Hz (Rigid and free wheel
Hub) / Block out of meshing spline in transfer case.
Step 1-1-2:
Run the vehicle forward and backward several meters and operate as required again.
1-2 When the flashing of 4WD indicator at 2Hz continues more than 11.5 seconds (repetition of 3 times of
above No.1 is counted) (Shift on the fly)
If there is difference of revolutions and phases between the front wheel and the axle, connecting the front
wheel and axle is difficult.
Until shifting in the transfer and connection of the front wheel and axle are completed
∗, the indicator flashes at
a frequency of 2Hz. In the above case, the indicator continues flashing at a frequency of 2Hz until the
connection of the front axle is completed. (If the shifting in the transfer is not completed, the flashing
frequency is changed to 4Hz (above No.1).)
By correcting the difference of relative revolutions and deviation of phases, the shifting can be completed.
Step 1-2:
While the vehicle is running, check it is safe around the vehicle and then accelerate or decelerate the
vehicle while going straight.
When the vehicle is at a stop, run the vehicle forward and backward several meters.

2. When shifting from 4H to 2H
2-1 When 4WD indicator continues flashing at 2Hz
W hen shifting from 4H to 2H, the 4W D indicator continues flashing at 2Hz until separation in the transfer and
the separation of the front wheel axle are completed∗. W hen torsional torque is accumulated in the drive
system, separation in the transfer and separation of the front axle∗ is difficult. In such a case, they can be
separated by removing the torsional torque of the drive system.
Step 2-1:
While the vehicle is running, check it is safe around the vehicle and then accelerate or decelerate the
vehicle while going straight.
When the vehicle is in stop, run the vehicle several meters forward and backward.

∗: Shift on the fly only.


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ISUZU KB P190 2007