Opel Frontera UBS. Manual - part 1986

4B2–91

DRIVE LINE CONTROL SYSTEM (TOD)

Chart D–1

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

Function of circuit

—

Fail condition

The TOD mode is displayed in the neutral position between high and 4L. When the lever

is shifted to the 4L position, the TOD mode is displayed.

Indicator lamp status

Transfer position

4L

Neutral

D04RY00054

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–92

Step

Action

Yes

No

1

Turn on the starter switch.

When the transfer lever is shifted to the high position, is 5V
observed between terminals 9 and 19 (4L switch)?

Go to Step 2

Go to Step 4

2

When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 9 and 19 (4L switch)?

Go to Step 3

Go to Step 4

3

When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 9 and 19 (4L switch)?

The ECU has

failed. Replace

the ECU.

Go to Step 13

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 (B–68)4 and (B–67)11?

Go to Step 5

Go to Step 7

5

When the transfer lever is shifted to the neutral position, is 0V
observed between terminals (B–68)4 and (B–67)11?

Go to Step 6

Go to Step 7

6

When the transfer lever is shifted to the 4L position, is 0V
observed between terminals (B–68)4 and (B–67)11?

The 4L switch

circuit is

short-circuited on

battery between

ECU and

transfer.Repair

the circuit.

Go to Step 13

Go to Step 7

7

Turn off the starter switch.

When the transfer lever is shifted to the high position, is the
continuity established between terminals (B–68)4 and (B–67)11?

Go to Step 12

Go to Step 8

8

When the transfer lever is shifted to the neutral position between
high and 4L, is the continuity established between terminals
(B–68)4 and (B–67)11?

Go to Step 9

Go to Step 10

9

When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–68)4 and (B–67)11?

The phenomenon

is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

Go to Step 11

10

1. Disconnect the A–3 connector.

When the transfer lever is shifted to the neutral position between
high and 4L, is the continuity established between transfer
connector terminals (A–3)12 and GND?

Wires are broken

between transfer

connector

(A–3)12 and

connector

(B-68)4.Repair

the circuit.

Go to Step 13

Repair the

transfer

assembly.

Go to Step 13

11

When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(A–3)12 and GND?

Wires are broken

between transfer

connector

(A–3)12 and

connector

(B-68)4.Repair

the circuit.

Go to Step 13

Repair the

transfer

assembly.

Go to Step 13

4B2–93

DRIVE LINE CONTROL SYSTEM (TOD)

Step

No

Yes

Action

12

When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(A–3)12 and GND?

Repair the

transfer

assembly.

Go to Step 13

Wires are broken

between transfer

connector

(A–3)12 and

connector

(B-68)4.Repair

the circuit.

Go to Step 13

13

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 13

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–94

Chart D–2

The 4L switch circuit is short-circuited to GND.

Function of circuit

—

Fail condition

The 4L mode is displayed even in the 2H or TOD.

Indicator lamp status

Transfer position

HIGH (2H or TOD)

D04RY00064