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
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