Isuzu Rodeo UE. Service manual — part 69

4B–7

DRIVELINE CONTROL SYSTEM

Diagnosis

Before Judging That Troubles Occur
(Unfaulty mode)

When Switching from 2WD to 4WD

1. In case that blinking frequency of the 4WD

indicator changes from 2Hz to 4Hz.
When heavy synchronization load is needed, the
motor actuator tries the shifting transfer gear three
times including the activation shifting. While the
motor actuator tries shifting, the indicator blinks by
2Hz. If the third shifting fails, the indicator’s blinking
changes from 2Hz to 4Hz at the same time that the
motor actuator shifted back to 2WD.
Heavy synchronization load occurs by

f

extremely lower temperature.

f

higher speed.rotation difference of wheels during
cornering.

Solution 1: Operate again after stop the vehicle or
slow down.

2. In case that the 4WD indicator continues blinking

by 2Hz for more than 11.5 seconds.
When there is rotation difference of wheels or there
is phase difference between front wheels and axles,
it is difficult to connect front wheels to front axles. The
blinking by 2Hz shows that shifting the transfer gear
or connecting the front wheels is in the middle of
operating. In above case, the indicator’s blinking by
2Hz shows that connecting the front wheels is not
completed (because the indicator’s blinking changes
to 4Hz when the shifting transfer gear is impossible.).
And removal of rotation or phase difference make
connecting the front wheels possible.
Solution 2: When vehicle is running, drive
straight ahead while accelerating and
decelerating. When vehicle is at a stop, move the
vehicle forward and backward from 2 to 3 meters.

When Switching from 4WD to 2WD

1. In case that the 4WD indicator continues blinking

by 2Hz .
The 4WD indicator continues blinking by 2Hz until
both shifting the transfer gear and disconnecting the
front wheels are completed when switching 4WD to
2WD. When drive line is loaded with torsional torque,
the shifting transfer gear and disconnecting front
wheels are impossible. In this case, removal of
torsional torque on drive line make the shifting
transfer gear and disconnecting front wheels
possible.
Solution 3: When vehicle is running, drive
straight ahead while accelerating and
decelerating. When vehicle is at a stop, move the
vehicle forward and backward from 2 to 3 meters.

2. In case that the 4WD indicator’s blinking changes

from 2Hz to 4Hz.
Check the position of transfer lever. Is it at “4L”
position? In view of the shifting mechanism of
transfer, the gear shifting from 4WD to 2WD at “4L”
condition is impossible.
Solution 4: Push the 4WD switch to 4WD, shift the
transfer lever to “High” position and re–operate
the 4WD switch to 2WD.

4B–8

DRIVELINE CONTROL SYSTEM

Parts Location

D08RX118

Legend

(1) Battery
(2) Fuse & Relay Box
(3) C–4
(4) M–11
(5) B–8
(6) C–31
(7) I–1
(8) Starter Switch
(9) I–2

(10) C–32

(11) I–19

(12) B–19
(13) C–16
(14) H–15, H–32
(15) H–18
(16) C–15
(17) M–12
(18) H–9, H–10, H–11

4B–9

DRIVELINE CONTROL SYSTEM

Wiring Diagram

D08RW214–1

4B–10 DRIVELINE CONTROL SYSTEM

D08RX119