Opel Frontera UBS. Manual - part 1011

4B1–22DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

Connector List

4B1–23

DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

4B1–24DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

4B1–25

DRIVE LINE CONTROL SYSTEM (SHIFT ON THE FLY)

Diagnosis of the Faults Based on the
Status of 4WD Indicator Lamp, 4WD
Switch and T/F Change Lever

Diagnosis charts are shown on below.  If troubles can not
be solved after every chart was traced, troubles may
occur in the 4WD control unit.  In this case, replace the
4WD control unit and trace every chart again.

Fault on switching from 2WD to 4WD

1. In case that 4WD indicator’s blinking changes

from 2Hz to 4Hz after Solution 1 is carried out.
Faults occur in the motor actuator or the transfer case
assembly. Remove the motor actuator and check
function. If problem was found and it was repaired, try
Solution 1 again.  After that, disassemble the
transfer case assembly for check and repair or
replace. If incident is not improved after above
mentioned actions were  taken, replace the 4WD
control unit.

2. In case that 4WD indicator does not blink nor

light, when switching from 2WD to 4WD.

Step

Action

Yes

No

1

Is ignition turned on?

Go to Step 2

Turn on the

ignition and trace

this chart from

start.

2

Does the indicator light comes on when the engine is not started?

Go to Step 3

Burning out of

indicator lamp or

disconnection of

harness wire.

Trace this chart

from the start

after repair or

replace.

3

Start the engine.

Is the 4WD switch turned from 2WD to 4WD?

Short-circuit

(body short) on

harness of the

4WD switch.

Fault of the 4WD

switch (holding

the closed

condition).

Trace this chart

from the start

after repair or

replace.

Push the 4WD

switch to 4WD.