Opel Frontera UE. Manual - part 1331

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–64

Check flow

Trouble code

Phenomenon

Standard

15

55

High-Low motor position signal is

abnormal

—

P1755

abnormal.

Circuit is shorted to GND.

D04R100009

SECTION

4B2–65

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

1. Turn on the starter switch.

Is the transfer changed to the low range from the high range?

Go to 

Step 2

Go to 

Step 4

2

Is the transfer changed to the high range from the low range?

Go to 

Step 3

Go to 

Step 5

3

1. Clear the trouble code.
2. Turn on the starter switch.

Is the memory DTC 55 (P1755)?

Go to 

Step 1

The phenomenon

is not

reproduced.

Refer to 

“Trouble

intermittently

observed”.

4

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

Is the continuity between the terminals ranged within the any case
(case1, 2 or 3) in the following table (1)?

Go to 

Step 8

Go to 

Step 6

5

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

Does the continuity between the terminals comply with the
following table (2)?

Go to 

Step 8

Go to 

Step 7

6

1. Turn off the starter switch.
2. Disconnect the transfer connector (A–2).

Is the continuity between the male terminals ranged within the any
case (case1, 2 or 3) in the following table (3)?

Go to 

Step 8

The encoder has

failed. Replace

the high-low

motor asm.

Go to 

Step 9

7

1. Turn off the starter switch.
2. Disconnect the transfer connector (A-2).

Does the continuity between male terminals comply with the
following table (4)?

Go to 

Step 8

The encoder has

failed. Replace

the high-low

motor asm.

Go to 

Step 9

8

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

(A–2).

Is there the continuity between connector terminal (C–60) 4 and
(A–2) 6, (C–60) 17 and (A–2) 1, (C–60) 3 and (A–2) 2, (C–60) 16
and (A–2) 3, and (C–60) 2 and (A–2) 5?

The encoder has

failed. Replace

the high-low

motor asm.

Go to 

Step 9

The circuit in

which there is no

continuity is

broken. Repair

the circuit.

Go to 

Step 9

9

1. Check that all the parts are mounted.
2. Clear the trouble code.

Is this step complete?

Verify the repair.

Go to 

Step 9

NOTE:

D

Confirm the operation conditions when changing high
and low range.
– The car stops. (less than 2 km/h or 1.2 mph and

engine speed: less than 1500 rpm)

– The AT selector position is neutral.
– The brake is applied (brake switch: ON)

D

Verify the completion of changing the high/low range
by the TOD indicator on the instrument panel.

D

When changing high/low range, start the engine to
prevent the battery dead.

SECTION

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–66

Table (1) (high position standard)

Case

Continuity between terminals:

26 and

24

39 and

24

25 and

24

38 and

24

1

NO

NO

NO

YES

2

NO

YES

NO

YES

3

YES

YES

NO

YES

Table (2) (low position standard)

Continuity between terminals:

26 and 24

39 and 24

25 and 24

38 and 24

YES

NO

YES

YES or NO

Table (3) (high position standard)

Case

Continuity between the connector (A–2)

terminals:

6 and 5

1 and 5

2 and 5

3 and 5

1

NO

NO

NO

YES

2

NO

YES

NO

YES

3

YES

YES

NO

YES

Table (4) (low position standard)

Continuity between the connector (A–2) terminals:

6 and 5

1 and 5

2 and 5

3 and 5

YES

NO

YES

YES or NO

SECTION

4B2–67

DRIVE LINE CONTROL SYSTEM (TOD)

Trouble Diagnosis Depending on The
Status of TOD Indicator

Functional check with TOD indicator light is conducted
prior to check on Charts A–H.

D

After the starter is switched on, check and see if the
status has become as tabulated below.

C04R200003

D

If the status is as tabulated above, there is no
problem. If not as tabulated above, inspect the
harness.

SECTION