Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 642
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–88
Step
No
Yes
Action
13
1. Apply the brake and fully turn the steering to the left (or right)
end, and start the creep run.
Does the voltage between terminals 11 and 22 range between 0.1
and 1.0V?
Repair the
transfer
assembly.
Go to Step 16
The ECU has
failed. Replace
the ECU.
Go to Step 16
14
1. Shift the transfer lever to the high (TOD) position and switch
the 4WD AUTO switch to 4WD position.
2. Fully turn the steering to the left (or right) end, and select the D
range and start the creep run.
Does the voltage between terminals 11 and 22 range between 0.1
and 1.0V?
Go to Step 15
Go to Step 10
15
1. Select the 4WD Auto Switch to the 2WD position.
2. Jack up the right front wheel.
Does the front tire rotate smoothly?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Repair the
transfer
assembly.
Go to Step 16
16
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 16
*NOTE: Before checking this item, run the vehicle more
than 10 meters with the steering wheel in straight position
so that the 4L mechanical lock sleeve can be released
certainly.
4B2–89
DRIVE LINE CONTROL SYSTEM (TOD)
Chart 2
The 4WD mode is not active.
Function of circuit
—
Fail condition
The rear wheels spin in the TOD mode, so the driving torque is not transmitted to the
front wheels. The indicator lamps will not show the 4L and TOD status.
D04RY00009
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–90
Step
Action
Yes
No
1
Is the trouble code 31(P1721) or 26 recorded?
Examine the
trouble based on
“Diagnosis from
Trouble Codes”.
Go to Step 7
Go to Step 2
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
When the transfer lever and 4WD switch are 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 11 and 22 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 11 and 22 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
4B2–91
DRIVE LINE CONTROL SYSTEM (TOD)
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.
D04RY00015
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