Opel Frontera UBS. Manual - part 156

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–76

Chart E–1

AXLE switch circuit wires are broken.

Function of circuit

—

Fail condition

Both the TOD and 4L modes are disabled. (The transition status is not removed.)

Indicator lamp status

Transfer position

TOD

4L

D04RW063

4B2–77

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

Start the engine.

When the transfer lever is shifted to the neutral position between
high and 4L, is 5V observed between terminals 10 and 19?

Go to Step 2

Go to Step 7

2

When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed between terminals
10 and 19?

Go to Step 3

Go to Step 7

3

When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 10 and 19?

The ECU has

failed. Replace

the ECU.

Go to Step 4

Go to Step 7

4

Shift the transfer lever to the 4L position.

Is 0V observed between terminals 25 and 19?

Go to Step 5

The ECU has

failed. Replace

the ECU.

Go to Step 19

5

Is 0V observed between terminals 26 and 19?

Go to Step 6

The ECU has

failed. Replace

the ECU.

Go to Step 19

6

Is 0V observed between terminals 27 and 19?

The phenomenon

is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

Go to Step 19

The ECU has

failed. Replace

the ECU.

Go to Step 19

7

When the transfer lever is shifted to the 2H position, is the battery
voltage observed between terminals 5 and 19?

Go to Step 8

Go to Step 11

8

When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage observed between terminals 5
and 19?

Go to Step 9

Go to Step 11

9

When the transfer lever is shifted to the high position (TOD mode),
is 0V observed between terminals 5 and 19?

Go to Step 10

Go to Step 11

10

When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 5 and 19?

Go to Step 12

Go to Step 11

11

Is any of the trouble codes 28, 32 and 33 recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to Step 19

The ECU has

failed.  Replace

the ECU.

Go to Step 19

12

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

Does the resistance between terminals (B–67)5 and (B–67)11
meet the standard, 17<  R < 25 ohm?

Go to Step 13

Repair the circuit

or replace the

VSV.

Go to Step 16

13

1. Turn on the starter switch.

When the 4WD SW is selected to the 2WD position, is the battery
voltage supplied to each VSV?

Go to Step 14

Repair the circuit

or replace the

VSV.

Go to Step 16

14

When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage supplied to each VSV?

Go to Step 15

Repair the circuit

or replace the

VSV.

Go to Step 19

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–78

Step

No

Yes

Action

15

When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed on each VSV?

Go to Step 16

Repair the circuit

or replace the

VSV.

Go to Step 19

16

When the transfer lever is shifted to the 4L position, is 0V
observed on each VSV?

Go to Step 17

Repair the circuit

or replace the

VSV.

Go to Step 19

17

Is the vacuum pressure supplied to the VSV?

Go to Step 18

Repair the

vacuum system.

Go to Step 19

18

Can the single AXLE switch enable and disable the continuity?

Repair the shift

on the fly system

(refer to Section

4C “Front Axle”.

Go to Step 19

Replace the

AXLE switch

(refer to Section

4C “Drive Shaft

System” of

Chassis Repair

Manual).

Go to Step 19

19

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 19

4B2–79

DRIVE LINE CONTROL SYSTEM (TOD)

Chart E–2

The AXLE switch circuit is short-circuited to GND.

Function of circuit

—

Fail condition

Even after the 4WD SW is select to the 2WD position, the 2WD mode is not enabled.

(The transition status is not removed.)

Indicator lamp status

Transfer position

2H

D04RW063