Isuzu Trooper (1998-2002 year). Service 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
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