Isuzu Trooper 1999 Workshop Manual page 302

3. Case that the indicator keeps blinking by 2Hz
after aforementioned Solution 2 is carried out.
Step
1 Check the air pressure and wear of all tires.
Were problems found?
2
Can the transfer lever be operated from High to 4L or vice versa?
3 Pull out the hoses from vacuum actuator and operate 4WD
switch.
Is there negative pressure on either of hoses?
4 Check the axle switch.
Were problems found?
DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)
Action Yes
Try Solution 2
after adjust the
air pressure and
replace worn
tires.
Go to Step 2
Disconnection of
the motor
actuator harness
wiring. Trace this
chart from the
start after repair
or replace.
Faults on the
motor actuator.
Trace this chart
from the start
after replace.
Internal faults of
transfer case.
Disassemble the
transfer case for
check. Trace this
chart from the
start after repair
Go to Step 3 or replace.
Faults on the
transfer position
switch or its
harness. Trace
this chart from
the start after
repair or replace.
Faults on the
VSV main body,
its harness or
vacuuming
system. Trace
the front axle
diagnosis chart in
this section.
After that, trace
this chart from
Go to Step 4 the start.
Disconnection on
the axle harness.
Trace this chart
from the start
after repair or
Faults on Front
Axle ASM. Trace
the front axle
Internal faults on
diagnosis chart in
axle switch.
this section.
Trace this chart
After that, trace
from the start
this chart from
after replace.
the start.
4B1–13
No
replace.