2007 ISUZU KB P190 Workshop Repair Manual

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Page 4913 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSFER CONTROL SYSTEM 7D1-39

HFV6 (LHD)

RTW 78AXF012701

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ISUZU KB P190 2007

Page 4914 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7D1-40 TRANSFER CONTROL SYSTEM

4JH1-TC

RTW 78AXF006901

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ISUZU KB P190 2007

Page 4915 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 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

Page 4916 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 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

Page 4917 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 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

BlackRevers

Page 4918 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 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)

Whit

Page 4919 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSFER CONTROL SYSTEM 7D1-45

No. Connector face No. Connector face
P5

Silver
Battery (-)

P6

Silver
Body earth (Ground)

P7

Battery (ALT)

P10

Silv

Page 4920 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 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 2H

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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