Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 1142
DRIVELINE CONTROL SYSTEM
4B–1
RODEO
DRIVELINE/AXLE
CONTENTS
DRIVELINE CONTROL SYSTEM
Service Precaution. . . . . . . . . . . . . . . . . . . . .
4B–1
Shift On The Fly System . . . . . . . . . . . . . . . .
4B–2
Outline of Shift on The Fly System . . . . . . .
4B–2
Functions of Indicator Lamp . . . . . . . . . . . .
4B–6
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . .
4B–7
Shift On The Fly Electrical Equipment . . . . . .
4B–17
Axle Shaft Connection and Disconnection .
4B–17
Actuator Assembly . . . . . . . . . . . . . . . . . . .
4B–17
4WD Control Unit. . . . . . . . . . . . . . . . . . . . . .
4B–20
4WD Control Unit Associated Parts . . . . . .
4B–20
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .
4B–20
Installation. . . . . . . . . . . . . . . . . . . . . . . . . .
4B–21
Shift On The Fly Controller . . . . . . . . . . . . . .
4B–21
Shift On The Fly Controller and
Associated Parts . . . . . . . . . . . . . . . . . . . .
4B–21
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .
4B–21
Installation. . . . . . . . . . . . . . . . . . . . . . . . . .
4B–21
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE
SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFER
TO THE
SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or
other corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.
4B–2
DRIVELINE CONTROL SYSTEM
Shift On The Fly System
Outline of Shift on The Fly System
The shift on the fly system switches between 2 wheel
drive (2WD) and 4 wheel drive (4WD) electrically by
driver's pressing the 4WD switch (push button type) on
instrument panel.
This system controls below operations. (Shifting
between “4H” and “4L” must be performed by transfer
control lever on the floor.)
1. Shifting the transfer front output gear (Connecting
to, and disconnecting from, front propeller shaft by
motor actuator).
2. Retrial of shifting the transfer front output gear.
3. Connecting front wheels to, and disconnecting them
from, the front axles by axle motor actuator.
4. Indicator on instrument panel.
5. 4WD out signal to other Electronic Hydraulic Control
Unit.
System Diagrams
412RY00005
DRIVELINE CONTROL SYSTEM
4B–3
Normal Operation
The motor actuator mounted on the transfer rear case is
driven by a signal from the 4WD switch (when
activated) mounted on the instrument panel. Then the
transfer position switch changes when the front output
gear is connected (or disconnected when the 4WD
switch is deactivated) to the front propeller shaft. The
axle disconnect controller is driven by the signal from
the transfer position switch and the axle motor actuator
connects (or disconnects when the 4WD switch is
deactivated) the front wheels to the front axles.
Time Chart of Shifting Under Normal Condition
F04R100004
4B–4
DRIVELINE CONTROL SYSTEM
Retrial
The transfer motor actuator starts the transfer gear
shifting after a signal from the 4WD switch mounted on
the instrument panel has been received. However,
shifting may not occur in severe cold weather or under
high speed conditions. When 2 seconds have passed
since the transfer gear shifting has commenced and
the transfer position switch does not activate (the gear
engagement is not completed), the motor reverses its
rotation for 1.2 seconds and automatically repeats the
operation again for a maximum of 3 times (with the 4WD
indicator lamp blinking-2Hz). If after 3 times the
transfer position switch does not come on, the gear
shifting will stop and the 4WD indicator lamp will blink
faster (4Hz) to alert the driver that the gear shifting has
stopped. The lamp will continue to blink until the driver
deactivates the 4WD switch (to 2WD mode).
Time Chart of Shifting Under Severe Condition (retrial)
F04R100002
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