Isuzu 2000 Trooper Workshop Manual page 443

Step
1 When the transfer lever is shifted to the High position, is 5V
observed between terminals 31 and 46 (4H switch)?
2 When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 31 and 46 (4H switch)?
3 When the transfer lever is shifted to the 4L position, is 5V
observed between terminals 31 and 46 (4H switch)?
4 1. Turn off the starter switch.
Is the continuity established between terminals 14 and 17?
5 Is the continuity established between terminals 14 and 6?
6 Is the continuity established between terminals 14 and 18?
7 Is the continuity established between terminals 14 and 19?
8 Is the continuity established between terminals 14 and 8?
9 1. Turn on the starter switch.
2. Shift the transfer lever is shifted to the 4L position.
Is 0 V observed between terminals 17 and 22?
10 Is 0 V observed between terminals 6 and 22?
11 Is 0 V observed between terminals 18 and 22?
12 Is 0 V observed between terminals 19 and 22?
13 Is 0 V observed between terminals 8 and 22?
DRIVE LINE CONTROL SYSTEM (TOD)
Action Yes
Go to Step 2 Go to Step 14
Go to Step 3 Go to Step 14
Go to Step 4 Go to Step 14
Replace TOD
indcator lamp
Go to Step 5 Go to Step 23
Replace TOD
indicator lamp
Go to Step 6 Go to Step 23
Replace TOD
indicator lamp
Go to Step 7
Go to Step 23
Replace TOD
indicator lamp
Go to Step 8
Go to Step 23
Replace TOD
indicator lamp
Go to Step 9
Go to Step 23
The ECU has
failed. Replace
Go to Step 10 Go to Step 23
The ECU has
failed. Replace
Go to Step 11 Go to Step 23
The ECU has
failed. Replace
Go to Step 12 Go to Step 23
The ECU has
failed. Replace
Go to Step 13 Go to Step 23
The phenomenon
is not
reproduced.
Refer to
"Troubles The ECU has
intermittently failed. Replace
observed".
Go to Step 23
Go to Step 23
4B2–65
No
bulb.
bulb.
bulb.
bulb.
bulb.
the ECU.
the ECU.
the ECU.
the ECU.
the ECU.