Isuzu Rodeo UE. Manual - part 71

4B–15

DRIVELINE CONTROL SYSTEM

2. Case that indicator keeps 2Hz blinking after aforementioned Solution 3 is carried out.

Step

Action

Yes

No

1

Check the air pressure and wear of all tires.

Were problems found?

Try Solution 3

after adjust the

air pressure and

replace worn

tires.

Go to Step 2

2

Can the transfer lever be operated from High to 4L or vice versa?

Faults on the

harness wiring of

motor actuator.

Trace this chart

from the start

after repair or

replace.

Internal faults on

transfer case.

Disassemble the

transfer case for

check.  Trace this

chart from the

start after repair

or replace.

Faults on the

motor actuator.

Trace this chart

from the start

after or replace.

Go to Step 3

3

Pull out the hoses from vacuum actuator and operate 4WD
switch.

Is there negative pressure on either of hoses?

Go to Step 4

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 diagnosis
chart in Front

Axle ASM

section.  After

that, trace this

chart from the

start.

4

Check the axle switch.

Were problems found?

Internal faults on

axle switch.

Trace this chart

from the start
after replace.

Faults on Front

Axle ASM.  Trace

the diagnosis
chart in Front

Axle ASM

section.  After

that, trace this

chart from the

start.

Short circuit

(body short) or

disconnection of

the axle harness.

Trace this chart

from the start

after repair or

replace.

4B–16 DRIVELINE CONTROL SYSTEM

3. Case that indicator’s blinking changes to 4Hz after aforementioned Solution 4 is carried out.

Step

Action

Yes

No

1

Can the transfer lever be operated from High to 4L or vice versa?

Faults on the

harness wiring of

motor actuator.

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 on

transfer case.

Disassemble the

transfer case for

check.  Trace this

chart from the

start after repair

or replace.

Faults on the

ECU.  Trace this

chart from the

start after

replace.

4B–17

DRIVELINE CONTROL SYSTEM

Shift On The Fly Vacuum Piping and Electrical Equipment

Vacuum Piping Diagram

C04RW005

Actuator Assembly

412RW024

Vacuum Tank

412RW025

4B–18 DRIVELINE CONTROL SYSTEM

Inspection and Repair

Vacuum Piping

C04RW004

1. Pull out the Hose A in figure and install a vacuum

gauge.

2. Plug up Hose B in figure to prevent the leak of

vacuum.

3. Start the engine and measure vacuum 2 or 3 minutes

afterward.

4. Repeat 1) and 2) but with Hose A plugged and Hose B

pulled out.

5. If vacuum measures –400mmHg, or if it shows a

sudden drop immediately after engine stop, inspect
the hose, tank, and pipe for damage.

NOTE: Be careful not to permit the entry of dust and
water during inspection.

6. Pull out Hose D in above illustration.
7. Plug Hose E in above illustration.
8. Make sure that Hose D in above illustration is under

atmospheric pressure.

9. Pull out Hose E and plug Hose D, and make sure that

Hose E is under atmospheric pressure.

10. If Check 8) or 9) has revealed stoppage, check and

see that there is no bend, foreign matter in the hose or
in the filter. If there is trouble, repair or replace.

Check Valve

C04RS004

1. Apply vacuum from the orange colored side(1).

Vacuum:–400mmHg

2. Check leakage of vacuum.
3. Make sure that vacuum cannot be applied from the

black colored side(2).

4. If vacuum is not applicable as much as –400mmHg,

and if there is resistance on the intake side, replace
with a new check valve.