Opel Frontera UBS. Service manual — part 1034

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–76

D04RY00115

Step

Action

Yes

No

1

Turn on the starter switch.

Is the battery voltage observed between terminals 1 and 19?

The ECU has

failed. Replace

the ECU.

Go to Step 2

Check the battery

circuit.

Go to Step 2

2

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 2

4B2–77

DRIVE LINE CONTROL SYSTEM (TOD)

Chart B–1

The 4WD AUTO switch circuit wires are broken or short-circuited to the GND

Function of circuit

—

Fail condition

Even after the transfer mode is selected from TOD to 2H, the indicator lamp status is not

changed.

Indicator lamp status

—

Transfer position

2H

—

D04RY00114

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–78

D04RY00115

4B2–79

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

1. Turn on the starter switch.

When the 4WD SW is selected to the 4WD position, is 0 V
observed between terminal 12 and 19?

Go to Step 2

Repair the 4WD

AUTO SW circuit.

Go to Step 4

2

When the 4WD AUTO SW is selected to the 2WD position, is 12 V
observed between terminals 12 and 19?

Go to Step 3

Repair the 4WD

AUTO SW circuit.

Go to Step 4

3

When the transfer lever is shifted to the 4L position, is battery
voltage observed between terminals 28 and 19?

The phenomenon

is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

Replace the

ECU.

Go to Step 4

4

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 4