Opel Frontera UBS. Manual - part 145

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–32

Check flow

Trouble code

Phenomenon

Standard

2

14

Front speed sensor signal open or

GND short, speed sensor com

open.

0.3 > sensor voltage

NOTE: The following procedure shows the case that the
front or rear sensor reference or common grounding line
is broken.

D04RW061

4B2–33

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

1. Start the engine.
2. Select 4H (TOD) mode.

Is the memory except DTC 14?

Go to Step 3

Go to Step 2

2

Is the continuity harness of terminal 24 (vehicle side terminal of
the front speed sensor)?

Replace speed

sensor.

Go to Step 6

Repair the circuit.

Go to Step 6

3

Is the memory DTC 24?

Go to Step 4

Refer to other

trouble check

flow.

Go to Step 2

4

Is the continuity between harness of terminal 23 and 24 (vehicle
side terminal of the front and rear speed sensor)?

Go to Step 5

Repair the circuit.

Go to Step 6

5

Is the continuity between harness of terminal 18 and 15 (vehicle
side terminal of the speed sensor COM and ref)?

Replace front and

rear speed

sensor.

Go to Step 6

Repair the circuit.

Go to Step 6

6

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

Is the step complete?

Repeat the

“Diagnosis Flow”.

The trouble is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

Return to Step 6

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–34

Check flow

Trouble code

Phenomenon

Standard

3

16

The front speed sensor no pulse.

Hi level : 4.5 

∼

 6.0 V

Lo level : 0.7 

∼

 2.0 V

Frequency (F) =

GAS: 832 Hz (at 50 km/h)

NOTE: Find the trouble in which the pulse corresponding
to the running speed is not input.

D04RW061

4B2–35

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

1. Connect TECH 2.

While running in TOD mode, does TECH–2’s front speed sensor
indication change with vehicle speed?

Go to Step 2

Repair and

inspection front

speed sensor

tone wheel.

Go to Step 4

2

Is the continuity harness of terminal 24 (vehicle side terminal of
the front speed sensor)?

Replace speed

sensor.

Go to Step 3

Repair the circuit.

Go to Step 3

3

1. Clear the trouble code.

While running at 40 kph in TOD mode for 30 consecutive sec, is
trouble code reissued?

Replace ECU.

Go to Step 4

Go to Step 4

4

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

Is this step complete?

Repeat the

“Diagnosis Flow”.

The trouble is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

Return to Step 4