Opel Frontera UBS. Manual - part 1954

4B1–1

DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

DRIVELINE/AXLE

DRIVELINE CONTROL SYSTEM (SHIFT ON THE FLY)

CONTENTS

Service Precaution

4B1–1

. . . . . . . . . . . . . . . . . . . . . . 

Shift on the Fly System (Lever Type)

4B1–2

. . . . . . . 

Outline of Shift on the Fly System
 (Lever Type)

4B1–2

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Shift on the Fly Vacuum Piping and Electric
 Equipment (For Lever Control Type)

4B1–3

. . . . . . 

Vacuum Piping Diagram

4B1–3

. . . . . . . . . . . . . . . . 

Inspection and Repair

4B1–4

. . . . . . . . . . . . . . . . . . 

Shift on the Fly System (Push Button Type)

4B1–7

. 

Outline of Shift on the Fly System
 (Push Button Type)

4B1–7

. . . . . . . . . . . . . . . . . . . . 

Functions of Indicator Lamp

4B1–11

. . . . . . . . . . . . . . . 

Diagnosis

4B1–11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Front Axle Diagnosis

4B1–30

. . . . . . . . . . . . . . . . . . . 

Shift on the Fly Vacuum Piping and Electric
 Equipment (For Push Button Type)

4B1–32

. . . . . . . . 

Vacuum Piping Diagram

4B1–32

. . . . . . . . . . . . . . . . 

Inspection and Repair

4B1–33

. . . . . . . . . . . . . . . . . . 

4WD Control Unit (For Push Button Type)

4B1–36

. . 

4WD Control Unit Associated Parts

4B1–36

. . . . . . 

Removal

4B1–37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

4B1–37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Service Precaution

WARNING: IF SO EQUIPPED WITH 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.

SECTION

4B1–2 DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

Shift on the Fly System (Lever Type)

Outline of Shift on the Fly System
(Lever Type)

The shift on the fly system (Lever type) switches between
2 wheel drive (2WD) and 4 wheel drive (4WD) by driver’s
shifting the transfer control lever on the floor.
This system controls below operations.

1. Connecting front wheels to, and disconnecting them

from, the front axles by vacuum actuator.

2. Indicator on instrument panel.
3. 4WD signal to Electronic Hydraulic Control Unit for

brake system (If anti–lock brake system is equipped).

4B1–3

DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

Shift on the Fly Vacuum Piping and Electric Equipment

 (For Lever Control Type)

Vacuum Piping Diagram

C04RW015

VSV Assembly, Actuator Assembly

412RS032

Vacuum Tank

412RS033

4B1–4 DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

Inspection and Repair

Vacuum Piping

C04RW016

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).