Opel Frontera UBS. Service manual — part 136
4B1–34DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)
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.
VSV Assembly
Inspect the vehicle side harness as follows:
412RS071
Legend
(1) Grey
(2) Blue
1. Remove connector.
2. Shift transfer lever to 2H and start the engine.
NOTE: Do not move the vehicle while inspection.
3. Make sure that there is continuity in the vehicle side of
harness. If there is no continuity, check transfer shift
switch and wiring.
Inspect both VSVs as follows:
F04RS004
1. With battery not connected (Usual).
A–C:There is continuity
B:Closed
2. With battery connected
A – B:There is continuity
C:Closed
3. If 1) and 2) fail, replace with a new VSV.
Axle Position Switch
412RS048
1. With ball (1) being free
A – B:There is continuity
2. With ball forced into the switch
A – B:No continuity
3. If 1) and 2) fail, replace with a new switch.
Motor Actuator Assembly
Inspect the function of the motor actuator assembly as
follows:
4B1–35
DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)
1. Disassemble the motor actuator from transfer rear
case.
412RW037
Legend
(3) Shift Rod
(4) Connector
2. Connect the terminals as shown in figure.
Shift rod of the motor actuator moves and stops
at 4WD position.
412RW038
Legend
(1) 2WD
(2) 4WD
(3) Shift Rod
(4) Connector
3. Connect the terminals as shown in figure.
Shift rod of the motor actuator moves and stops
at 2WD position.
412RW039
Legend
(1) 2WD
(2) 4WD
(3) Shift Rod
(4) Connector
4. If 2) and 3) fail, replace with a new motor actuator.
Transfer Position Switch
412RW040
Legend
(1) Ball
1. With ball being free.
A–B : There is continuity.
2. With ball forced into the switch.
A–B : No continuity.
3. If 1) and 2) fail, replace with a new switch.
4B1–36DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)
4WD Control Unit (For Push Button Type)
4WD Control Unit Associated Parts
412RW044
Legend
(1) Lower Cluster Assembly
(2) Front Console Assembly
(3) Harness Connector
(4) Nut
(5) 4WD Control Unit
4B1–37
DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)
Removal
1. Remove lower cluster assembly and front console
assembly.
Refer to Interior Trim in Body and Accessories
section.
2. Remove nut.
3. Remove 4WD control unit.
4. Disconnect harness connector (1).
412RW045
Legend
(1) Harness Connector
Installation
1. Connect harness connector, then install 4WD control
unit.
2. Install lower cluster assembly and front console
assembly.
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