2004 ISUZU TF SERIES Workshop Manual

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Page 3625 of 4264

ISUZU TF SERIES 2004 Workshop Manual TRANSFER CASE 7D-37

ILLUSTRATION PART NO.
PART NAME
5-8840-2787-0
Snapring installer

Page 3626 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7D-38 TRANSFER CASE
MEMO

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ISUZU TF SERIES 2004 Workshop Manual TRANSFER CONTROL SYSTEM 7D1-1
SECTION 7D1
TRANSFER CONTROL SYSTEM
TABLE OF CONTENTS
PAGE
Service Precaution ....................................................................................

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ISUZU TF SERIES 2004 Workshop Manual 7D1-2 TRANSFER CONTROL SYSTEM

Service Precaution
WARNING:
THIS VEHICLE HAS A SUPPLEMENTAL RESTRAINT
SYSTEM (SRS). REFER TO THE SRS COMPONENT AND
WIRING LOCATION VIEW IN ORDER TO DETERMINE
WH

Page 3629 of 4264

ISUZU TF SERIES 2004 Workshop Manual TRANSFER CONTROL SYSTEM 7D1-3
General Description

RTW47DLF000301

Transfer Position and Drive Mode
Three drive modes can be selected through operation of 4WD switch.

Transfer Posi

Page 3630 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7D1-4 TRANSFER CONTROL SYSTEM
Summary of transfer control system
The transfer control system switches between the 2-wheel
drive (2H), 4-wheel drive high-speed (4H), 4-wheel drive low-
speed (4L)

Page 3631 of 4264

ISUZU TF SERIES 2004 Workshop Manual TRANSFER CONTROL SYSTEM 7D1-5
System Components
Parts Location

Speed sensor
Revolutions of the rear output shaft are decreased and taken
out by the speed/drive/driven gears installed in

Page 3632 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7D1-6 TRANSFER CONTROL SYSTEM
spring standby mechanism is provided between the rod and
sleeve so that the rod is positioned at the 4
2 position, while
the sleeve is at the 44 position in sometim

7D1-6 TRANSFER CONTROL SYSTEM
spring standby mechanism is provided between the rod and
sleeve so that the rod is positioned at the 4
2 position, while
the sleeve is at the 44 position in sometime.
This mechanism is provided to protect the shift mechanism
from the force to prevent the movement of the sleeve
(torsional torque etc. of the drive system). By releasing the
preventive force, the sleeve can move to 4
2 state by the
spring force.

Neutral switch
The neutral switch detects the movement of the shift rod
driving the high-low sleeve.
PUSH close is achieved with the PUSH close switch when the
shift rod is positioned between the High and the Low, that is,
at the neutral state.

High-Low Sleeve & Arm
The spring standby mechanism is provided for the high-low
sleeve in both directions of the high-low shift rod. For this
reason, the rod position and the actual sleeve position may be
offset in some cases.
This system is provided to protect the shift mechanism from
the collision due to coincidence of the high and low phases of
the engaged splines. By giving rotational force to the
preventing phase coincidence, the splines are moved to the
proper engagement position by the spring force.

Shift actuator
The output shaft is rotated by the built-in motor and the
transfer position is switched.
Detection (limit) switches to detect the rotating angle of the
output shaft is provided to the actuator at 4 positions, which
are connected to the transfer controller through the vehicle
harness to constantly transmit the actuator operating angle
and changes in its transfer status.

7B4-PDF2
4WD indicator (in meter panel)
This lamp indicates the following items
Valve check
Drive condition (2WD-4WD)
Operating condition (2Hz: Actuator in operation, mechanism
standby)
Restrictions on operation (4Hz, including indication of
interrupted operation due
to excessive load)
4L indicator (in meter panel)
This lamp indicates following items.
Valve check
Driving status (High-Low)
Operating status (2Hz: Actuator in operation, mechanism
standby)
Restrictions on operation (4Hz)

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