Isuzu Trooper (1998-2002 year). Manual - part 158

4B2–119

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

Is the trouble code 31 or 26 recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to Step 2

2

Is any of the trouble codes 28(P1760), 32(P1761) and 33(1762)
recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to Step 3

3

When the transfer lever is in the specified position, do the TOD
indicator lamps show the correct status?

Go to Step 4

Examine the

trouble based on

“Trouble

Diagnosis

Depending on

The Status of

TOD Indicator”.

4

Shift the transfer lever to the 4L position, fully turn the steering to
the left (or right) end, and start the creep run.  Does the tight
corner braking occur?

 Go to Step 5

Repair the

transfer

assembly.

 Go to Step 7

5

1. Shift the transfer lever to the high (TOD) position.
2. Turn on the starter switch.

Does the voltage between terminals 4 and 20 indicate at least 3V
while the throttle is completely open?

 Go to Step 6

The ECU has

failed. Replace

the ECU.

 Go to Step 7

6

Does the voltage between terminals 4 and 20 indicate at least
0.1V while the throttle is completely closed?

The TOD clutch

is worn. Repair

the transfer

assembly.

 Go to Step 7

The ECU has

failed. Replace

the ECU.

 Go to Step 7

7

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 7

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–120

Chart 3

The shift on the fly system generates gear noises.

(The fuel economy is bad in the 2H mode.)

Function of circuit

—

Fail condition

When the vehicle is run in the 2H mode, the shift on the fly system generates gear

noises or the front wheel gears are engaged to generate a shock.

D04RY00073

4B2–121

DRIVE LINE CONTROL SYSTEM (TOD)

Step

Action

Yes

No

1

Do the indicator lamps show the correct status?

Go to Step 2

Examine the

trouble based on

“Touble Diagnosis

Depending on

The Status of

TOD Indicator”.

2

Is any of the trouble codes 28(P1760), 32(P1761) and 33(P1762)
recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes”.

Go to Step 3

3

Turn on the starter switch.

Is the battery voltage observed between terminals 1 and 20?

Go to Step 4

Go to Step 5

4

When the 4WD AUTO SW is selected to the 2WD position, are the
front axle gears correctly disengaged (and when the left front tire
is jacked up and turned, is the front propeller shaft standstill)?

The phenomenon

is not

reproduced.

Refer to

“Troubles

intermittently

observed”.

The shift on the

fly system is

failed (refer to

Section 4B1 and

4C.)

 Go to Step 6

5

Does the battery voltage maintain the correct level?

Repair the battery

circuit.

 Go to Step 6

Repair the battery

and charging

system.

 Go to Step 6

6

Check that all the parts are mounted.

Is this step complete?

Repeat the

“Diagnosis Flow”.

Return to Step 6

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–122

Chart 4

The braking distance gets long even when the ABS is active.

Function of circuit

—

Fail condition

Enough deceleration is not obtained and the braking distance gets long even when the

ABS is active in the 2H mode.

D04RY00073