Opel Frontera UBS. Manual - part 153

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–64

Step

Action

Yes

No

1

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

SW circuit.

Go to Step 7

2

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

Go to Step 3

Repair the 4WD

SW circuit.

Go to Step 7

3

1. Disconnect the ECU connector.

Is the continuity established between terminals (B–67)1 and
(B–68)13?

Go to Step 4

Replace TOD

indicator lamp

bulb.

Go to Step 7

4

Is the continuity established between terminals (B–67)1 and
(B–68)14?

Go to Step 5

Replace TOD

indicator lamp

bulb.

Go to Step 7

5

Is the continuity established between terminals (B–67)1 and
(B–68)15?

Go to Step 6

Replace TOD

indicator lamp

bulb.

Go to Step 7

6

Is the continuity established between terminals (B–67)1 and
(B–68)16?

Replace ECU.

Go to Step 7

Replace TOD

indicator lamp

bulb.

Go to Step 7

7

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 7

4B2–65

DRIVE LINE CONTROL SYSTEM (TOD)

Chart C–1

4H switch circuit wires are broken or the battery is short-circuited.

Function of circuit

—

Fail condition

When the 4WD SW is 4WD mode.

When the lever is shifted from 4L to HIGH, the 4L mode remains on the indicator and the

TOD mode is displayed without turning off the previous mode.

Indicator lamp status

Transfer position

4L <——> Neutral <——> TOD

D04RW062

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–66

Step

Action

Yes

No

1

1. Turn on the starter switch.

When the transfer lever is shifted to the high position, is 5V
observed between terminals 8 and 19 (4H switch)?

Go to Step 2

Go to Step 4

2

When the transfer lever is shifted to the 4L position, is 5V
observed between terminals 8 and 19 (4H switch)?

Go to Step 3

Go to Step 4

3

When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?

Replace the

ECU.

Go to Step 4

Go to Step 4

4

1. Turn off the starter switch.
2. Disconnect the ECU connector.
3. Turn on the starter switch.

When the transfer lever is shifted to the high position, is 12V
observed between terminals 8 and 19 (4H switch)?

Go to Step 5

Go to Step 7

5

When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?

Go to Step 6

Go to Step 7

6

When the transfer lever is shifted to the 4L position, is 12V
observed between terminals 8 and 19 (4H switch)?

The 4H switch

circuit battery is

short-circuited

between ECU

and transfer.

Repair the circuit.

Go to Step 14

Go to Step 7

7

Turn off the starter switch.

When the transfer lever is shifted to the neutral position, is the
continuity established between terminals 8 and 19 (4H switch)?

Go to Step 8

Go to Step 10

8

When the transfer lever is shifted to the high position, is the
continuity established between terminals 8 and 19?

Go to Step 10

Go to Step 9

9

When the transfer lever is shifted to the 4L position, is the
continuity established between terminals 8 and 19?

Go to Step 14

The phenomenon

is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

Go to Step 10

10

When the transfer lever is shifted to the neutral position, is the
continuity established between terminals (A–3)4 and (A–3)7?

Go to Step 11

Repair the

transfer

assembly.

Go to Step 14

11

When the transfer lever is shifted to the high   position, is the
continuity established between transfer connector terminals
(A–3)4 and (A–3)7?

Repair the

transfer

assembly.

Go to Step 14

Go to Step 12

12

When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(B–68)3 and (A–3)4?

Repair the

transfer

assembly.

Go to Step 14

Go to Step 13

4B2–67

DRIVE LINE CONTROL SYSTEM (TOD)

Step

No

Yes

Action

13

Is the continuity established between transfer terminals  (A–3)4
and body?

The ECU has

failed. Replace

the ECU.

Go to Step 14

The harness is

broken between

terminal (A–3)4

and GND. Repair

the circuit.

Go to Step 14

14

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 14