Isuzu Trooper (2000 year). Service manual - part 103

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–32

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 between harness of terminal 32 and ground
(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 32 and 45 (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 12 and 13 (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

4B2–33

DRIVE LINE CONTROL SYSTEM (TOD)

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) =

766 Hz (at 30 mile/h)

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

D04RY00004

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–34

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 between harness of terminal 32 and ground
(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 30 mph 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

4B2–35

DRIVE LINE CONTROL SYSTEM (TOD)

Check flow

Trouble code

Phenomenon

Standard

4

27

The front speed sensor no pulse.

Hi level : 4.5 

∼

 6.0 V

Lo level : 0.7 

∼

 2.0 V

Frequency (F) =

766 Hz (at 30 mile/h)

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

D04RY00004