Isuzu 2000 Trooper Workshop Manual page 455

Step
1 Start the engine.
When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage observed between terminals 42
and 46?
2 When the transfer lever is shifted to the high position and 4WD
Auto Switch selected to 4WD position, is 0V observed between
terminals 42 and 46?
3 When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 10 and 19?
4 Select the 4WD Auto Switch to the 2WD position.
Is 12V observed between terminals 17 and 46?
5 Is 12V observed between terminals 6 and 46?
6 Is 12V observed between terminals 18 and 46?
7 When the 4WD Auto Switch is select to the 2WD position, is the
battery voltage observed between terminals 23 and 46?
8 When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage observed between terminals 23
and 46?
9 When the transfer lever is shifted to the high position and 4WD
Auto Switch selected to 4WD position, is 0V observed between
terminals 23 and 46?
10 When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 23 and 46?
11 Is any of the trouble codes 28, 32 and 33 recorded?
12 1. Turn off the starter switch.
2. Disconnect the ECU connector.
Does the resistance between terminals (B–48)1 and (B–48)24
meet the standard, 17< R < 25 ohm?
13 1. Connect the ECU connector.
2. Turn on the starter switch.
When the 4WD Auto Switch is select to the 2WD position, is the
battery voltage supplied to each VSV?
14 When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage supplied to each VSV?
15 When the transfer lever is shifted to the high position and 4WD
Auto Switch selected to 4WD position, is 0V observed on each
VSV?
DRIVE LINE CONTROL SYSTEM (TOD)
Action Yes
Go to Step 2 Go to Step 7
Go to Step 3 Go to Step 7
Go to Step 4 Go to Step 7
Go to Step 5 Go to Step 19
Go to Step 6 Go to Step 19
The phenomenon
is not
reproduced.
Refer to
"Troubles
The ECU has
intermittently failed. Replace
observed".
Go to Step 19
Go to Step 17
Go to Step 8 Go to Step 11
Go to Step 9 Go to Step 11
Go to Step 10 Go to Step 11
Go to Step 12 Go to Step 11
Examine the
trouble based on
The ECU has
"Diagnosis from failed. Replace
Trouble Codes".
Go to Step 19
Go to Step 19
Repair the circuit
of replace the
Go to Step 13 Go to Step 19
Repair the circuit
of replace the
Go to Step 14 Go to Step 19
Repair the circuit
of replace the
Go to Step 15
Go to Step 19
Repair the circuit
of replace the
Go to Step 16
Go to Step 19
4B2–77
No
the ECU.
the ECU.
VSV.
VSV.
VSV.
VSV.