Opel Frontera UE. Manual - part 1312

4B1–10 DRIVELINE CONTROL SYSTEM

D04R100027

SECTION

4B1–11

DRIVELINE CONTROL SYSTEM

Connector List

No.

Connector face

B-8

B-19

C-16

C-36

C-49

C-55

E-4

E-19

E-30

No.

Connector face

E-56

E-57

E-60

H-6

H-15

H-17

H-18

I-1

I-19

SECTION

4B1–12 DRIVELINE CONTROL SYSTEM

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

A diagnostic flow chart is shown below. If after performing
the diagnosis and a condition still exists, then there may
be a fault in the ECU. The ECU will need to be replaced
and perform the diagnostic flow chart again.

Fault on Switching from 2WD to 4WD

1. When the 4WD indicator lamp blinking pattern

changes (from 2Hz to 4Hz) after performing
“Solution 1.” 
The motor actuator or the transfer case assembly
may be inoperative. Remove the motor actuator and
perform bench test. Make any needed repairs and
perform “Solution 1” again. Then disassemble and
inspect the transfer case assembly. Repair or replace
as needed. If after the repairs, the condition still
exists, then replace the ECU.

2. When the 4WD indicator lamp do not blink or

light up 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 4WD indicator lamp light up during the two second
initialization after the ignition is turned on?

Go to 

Step 3

Burned out

indicator lamp or

disconnected

harness wire.

Perform the

diagnostic chart

from step 1 after

repair or

replacement.

3

Is the 4WD switch activated from 2WD to 4WD mode?

Short-circuit

(body short) on

harness of the

4WD switch.

Inoperative 4WD

switch (stuck

closed condition).

Trace this chart

from the step 1

after repair or

replace.

Push the 4WD

switch to 4WD.

SECTION

4B1–13

DRIVELINE CONTROL SYSTEM

3. When the 4WD Indicator lamp continues to blink

after performing Solution 2.

Step

Action

Yes

No

1

Check the air pressure and wear on all tires.

Were problems found?

Correct the tire

pressure and

replace worn tires

then perform

“Solution 2.”

Go to 

Step 2

2

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

Go to 

Step 3

If the motor

actuator harness

was

disconnected,

then repair and

repeat step 1. 

If the motor

actuator is

inoperative, then

replace the motor

actuator and

repeat step 1. 

If the transfer

case was not

working properly,

then repair as

needed and

repeat step 1. 

3

Confirm that the transfer switch is operating normally. Replace if
needed.

Go to 

Step 4

—

4

1. Disconnect the connector C–47.
2. Turn on the starter switch
3. Measure voltage between the connector C–47 terminals 4 and

3, when 4WD switch on instrument panel is switched on 2WD
and 4WD position.

Is the motor actuator voltage on the axle as “Time Chart of Shifting
Under Normal Condition” aforementioned? Refer to 

the page

(4B–3).

Go to 

Step 8

Go to 

Step 5

5

1. Inspect the wiring for poor electrical connections, open or

short to ground between the connector-terminal E56–1 and
B19–7, E57–1 and ground, C47–1 and B19–6, C47–2 and
ground, H18–1 and B19–12, B19–8 and C49–3, H17–19 and
C49–3, C49–1 and C47–4, C49–2 and C47–3, and C49–6 and
ground.

2. Repair the circuit.

Is the motor actuator voltage on the axle as “Time Chart of Shifting
Under Normal Condition” aforementioned? Refer to 

the page

(4B–3).

Go to 

Step 8

Go to 

Step 6

6

Check the axle switch continuity between the connector C–47
terminals 1 and 2.

Is the axle switch open or close as “Time Chart of Shifting Under
Normal Condition” aforementioned? Refer to 

the page (4B–3).

Go to 

Step 8

Go to 

Step 7

7

Replace the axle motor actuator.

Go to 

Step 8

—

8

Reconnect all components, ensure all components are properly
mounted.

Was this step finished

Trace this chart

from the start.

Go to 

Step 8

SECTION