Isuzu Trooper (1998-2002 year). Service manual - part 153

4B2–99

DRIVE LINE CONTROL SYSTEM (TOD)

D04RY00069

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–100

D04RY00070

4B2–101

DRIVE LINE CONTROL SYSTEM (TOD)

D04RY00071

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–102

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
AUTO SW is selected  to the 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”.

The ECU has

failed. Replace

the ECU.

Go to Step 19

7

When the transfer lever is shifted to the high position and 4WD
AUTO SW is selected 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 and 4WD
AUTO SW is selected to the 4WD 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”.

The ECU has

failed.  Replace

the ECU.

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 19

13

1. Turn on the starter switch.

When the 4WD AUTO 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 19

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