Opel Frontera UE. Manual - part 1343

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–112

Chart 5

The transfer does not change to low from high.

Function of circuit

—

Fail condition

When the TOD switch is selected to the 4L position, the transfer does not change to the

low range.

D04R100014

SECTION

4B2–113

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

1. Turn on the starter switch.

Is any of the trouble codes 41 (P1741), 42 (P1773), 43 (P1743)
and 55 (P1755) recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to 

Step 2

2

Is any of the trouble codes 13 (P1735), 14 (P1731), 15 (P1736),
16 (P1737), 24 (P1733), and 27 (P1738) recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to 

Step 3

3

Is the trouble code 17 (P1774) recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to 

Step 4

4

1. Turn on the starter switch.
2. The car stops, engine speed is less than 1500 rpm, the AT

selector is N position, and select the TOD switch to the 4L
position.

Do the front lamp and rear lamp in the indicator blink?

Go to 

Step 5

Examine the

trouble based on

“Trouble

Diagnosis

Depending on the

Status of TOD

Indicator”.

5

1. Step on the brake pedal.

Is the transfer changed to the 4L mode?

The phenomenon

is not

reproduced.

Refer to 

“Trouble

intermittently

observed”.

Go to 

Step 6

6

When the vehicle is moved forth and back, is the transfer changed
to the 4L mode?

The phenomenon

is not

reproduced.

Refer to 

“Trouble

intermittently

observed”.

Go to 

Step 7

7

Does the continuity corresponding to the encoder position
between the terminals comply with the 4L position in the following
table (continuity)?

Examine the

trouble based on

“Trouble

diagnosis

Depending on

The Status of

TOD Indicator”.

Go to 

Step 8

8

1. Step on the brake pedal.

Is the battery voltage observed between the terminal 37 and 47?

Go to 

Step 10

Go to 

Step 9

9

1. Turn off the starter switch.
2. Disconnect the ECU connector (C–60) and the brake switch

connector (I–31).

Is there the continuity between the connector terminal (C–60) 15
and (I–31) 4?

The brake switch

is abnormal.

Repair or replace

the brake switch.

Go to 

Step 13

Repair the

harness.

Go to 

Step 13

10

1. Select the AT selector to the N position.

Is the voltage between the terminals ranged within the following
table (voltage)?

Go to 

Step 12

Go to 

Step 11

11

1. Turn off the starter switch.
2. Disconnect the ECU connector (C–60).
3. Disconnect the AT mode switch connector (E–53).

Is there the continuity between the following connector terminals?
(C–60)6 and (E–53)8 (C–60)19 and (E–53)7 (C–60)5 and
(E–53)6

Repair or replace

the AT mode

switch.

Go to 

Step 13

Repair the circuit

which has no

continuity.

Go to 

Step 13

SECTION

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–114

Step

No

Yes

Action

12

1. Start the engine.

Is the engine pulse signal between terminal 2 and 47 at engine
speed under 1500 rpm within the standard? Standard: less than
4500 Hz

Replace the

ECU.

Go to 

Step 13

The engine pulse

signal is

abnormal. Repair

or replace the

PCM.

Go to 

Step 13

13

Check that all the parts are mounted.

Is this step complete?

Verify the repair.

Go to 

Step 13

Continuity between terminal in 4L position (Table:
continuity)

Terminals

No.

26 and

24

39 and

24

25 and

24

38 and

24

Continuity

of 4L

position

YES

NO

YES

YES or

NO

Standard (Table: voltage)

Unit: V

Terminals

28 and 47

41 and 47

27 and 47

Voltage

0

12

0

SECTION

4B2–115

DRIVE LINE CONTROL SYSTEM (TOD)

Chart 6

The transfer does not change to high from low.

Function of circuit

—

Fail condition

When the TOD switch is selected to the TOD, the transfer does not change to the high

range.

D04R100014

SECTION