Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual - part 106

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–42

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 6

2

1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30
consecutive sec, is the trouble code reissued?

Go to 

Step 3

The trouble is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

3

1. Turn off the starter switch.
2. Disconnect the ECU connector (C–38) and (C–37).

Is there the continuity between the connector (C–37) terminal 10
and 25?

Repair the circuit.

Go to 

Step 6

Go to 

Step 4

4

1. Disconnect the transfer connector (A–1).

Is there the continuity between the connector (C–37) terminal 10
and the connector (A–1) terminal 6, the connector (C–38) terminal
12 and connector (A–1) terminal 2, and the connector (C–38)
terminal 13 and connector (A–1) terminal 10?

Replace the front

speed sensor.

Go to 

Step 5

Repair the circuit.

Go to 

Step 5

5

1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30
consecutive sec, is the trouble code reissued?

Replace ECU.

Go to 

Step 6

Go to 

Step 6

6

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

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 6

4B2–43

DRIVE LINE CONTROL SYSTEM (TOD)

Check flow

Trouble code

Phenomenon

Standard

5

27

The rear speed sensor no pulse.

Hi level : 4.5 

∼

 6.0 V

Lo level : 0.7 

∼

 2.0 V

P1738

Frequency (F) =

700-850 Hz (at 50 km/h or 31 mph)

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

D04R200005

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–44

Step

Action

Yes

No

1

1. Connect TECH 2.

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

Go to 

Step 2

Repair and

inspection front

speed sensor

tone wheel.

Go to 

Step 6

2

1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30
consecutive sec, is the trouble code reissued?

Go to 

Step 3

The trouble is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

3

1. Turn off the starter switch.
2. Disconnect the ECU connector (C–38) and (C–37).

Is there the continuity between the connector (C–37) terminal 23
and 25?

Repair the circuit.

Go to 

Step 5

Go to 

Step 4

4

1. Disconnect the transfer connector (A–1).

Is there the continuity between the connector (C–37) terminal 23
and the connector (A–1) terminal 5, the connector (C–38) terminal
12 and connector (A–1) terminal 1, and the connector (C–38)
terminal 13 and connector (A–1) terminal 9?

Replace the rear

speed sensor.

Go to 

Step 5

Repair the circuit.

Go to 

Step 5

5

1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30
consecutive sec, is the trouble code reissued?

Replace ECU.

Go to 

Step 6

Go to 

Step 6

6

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

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to 

Step 6

4B2–45

DRIVE LINE CONTROL SYSTEM (TOD)

Check flow

Trouble code

Phenomenon

Standard

6

13 (P1735)

The reference is short-circuited to

GND.

Reference 

]

 5 V

15 (P1736)

The reference is short-circuited to

VB.

If the reference wire (12) is short-circuited to GND, the
speed signal is not generated. If the wire is short-circuited
to the battery voltage, the signal level becomes faulty.

D04R200005