Opel Frontera UE. Manual - part 1341

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–104

Step

Action

Yes

No

1

Are the front and rear tires in specified size?

Go to 

Step 2

Replace the tires

with specified

ones, and service

the new tires.

 Go to 

Step 16

2

Is the tire pressure correct?

Go to 

Step 3

Inflate the tires

with specified

pressure.

 Go to 

Step 16

3

Are the tires free from abnormal wear?

Go to 

Step 4

Replace the tires

with specified

ones, and service

the new tires.

 Go to 

Step 16

4

Are different types of tires used?

 Go to 

Step 5

Replace the tires

with specified

ones, and service

the new tires.

 Go to 

Step 16

5

1. Start the engine.
2. Select the TOD switch to the TOD position.
3. Fully turn the steering to the left (or right) end, and select the D

range and start the creep run.

Does the tight corner braking occur? Is the judder with chug-chug
sound observed? * Use caution on the operation.

 Go to 

Step 6

 Go to 

Step 11

6

1. Select the TOD switch to the 2H position.
2. Fully turn the steering to the left (or right) end, and select the D

range and start the creep run.

Does the tight corner braking occur? Is the judder with chug-chug
sound observed? * Use caution on the operation.

 Go to 

Step 7

 Go to 

Step 14

7

Is an LSD mounted to the rear differential?

 Go to 

Step 8

 Go to 

Step 9

8

Is the genuine LSD oil used in the rear differential?

 Go to 

Step 9

Replace the

differential oil.

 Go to 

Step 16

9

Does the engine output the power correctly?

 Go to 

Step 10

Check the

engine.

 Go to 

Step 16

10

Do the speed sensors work correctly? (Check trouble codes.)

The ECU has

failed. Replace

the ECU.

 Go to 

Step 16

Replace the

speed sensors.

 Go to 

Step 16

11

Is the tight corner braking observed only when the brake is
applied?

 Go to 

Step 12

Conduct full

steering under

WOT.

 Go to 

Step 5

12

1. Turn on the starter switch.

Is 8 

∼

 10 V observed between terminals 33 and 47?

 Go to 

Step 13

Repair the circuit

of the ECU

connector

terminal 33 (ABS

IN).

 Go to 

Step 16

SECTION

4B2–105

DRIVE LINE CONTROL SYSTEM (TOD)

Step

No

Yes

Action

13

1. Apply the brake and fully turn the steering to the left (or right)

end, and start the creep run.

Does the voltage between terminals 11 and 22 range between 0.1
and 1.0V?

Repair the

transfer

assembly.

 Go to 

Step 16

The ECU has

failed. Replace

the ECU.

 Go to 

Step 16

14

1. Select the TOD switch to the TOD position.
2. Fully turn the steering to the left (or right) end, and select the D

range and start the creep run.

Does the voltage between terminals 11 and 22 range between 0.1
and 1.0V?

 Go to 

Step 15

 Go to 

Step 10

15

1. Select the TOD switch to the 2H position.
2. Jack up the right front wheel.

Does the front tire rotate smoothly?

The phenomenon

is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

Repair the

transfer

assembly.

 Go to 

Step 16

16

Check that all the parts are mounted.

Is this step complete?

Verify the repair

Go to 

Step 16

*NOTE: Before checking this item, run the vehicle more
than 10 meters with the steering wheel in straight position
so that the 4L mechanical lock sleeve can be released
certainly.

SECTION

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–106

Chart 2

The TOD mode is not active.

Function of circuit

—

Fail condition

The rear wheels spin in the TOD mode, so the driving torque is not transmitted to the

front wheels. The indicator lamps will not show the 4L and TOD status.

D04R100010

SECTION

4B2–107

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

Is the trouble code 31(P1721) recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to 

Step 2

2

Is any of the trouble codes 28(P1760), 32(P1761) and 33(P1762)
recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to 

Step 3

3

When the TOD switch is selected to the specified position, do the
TOD indicator lamps show the correct status?

Go to 

Step 4

Examine the

trouble based on

“Trouble

Diagnosis

Depending on

The Status of

TOD Indicator”.

4

Select the TOD switch to the 4L position, fully turn the steering to
the left (or right) end, and start the creep run. Does the tight corner
braking occur?

 Go to 

Step 5

Repair the

transfer

assembly.

 Go to 

Step 7

5

1. Select the TOD switch to the TOD position.
2. Turn on the starter switch.

Does the voltage between terminals 11 and 22 indicate at least 3V
while the throttle is completely open?

 Go to 

Step 6

The ECU has

failed. Replace

the ECU.

 Go to 

Step 7

6

Does the voltage between terminals 11 and 22 indicate at least
0.1V while the throttle is completely closed?

The TOD clutch

is worn. Repair

the transfer

assembly.

 Go to 

Step 7

The ECU has

failed. Replace

the ECU.

 Go to 

Step 7

7

Check that all the parts are mounted.

Is this step complete?

Verify the repair.

Go to 

Step 7

SECTION