Isuzu 2000 Trooper Workshop Manual page 423

Step
1 1. Turn off the starter switch.
2. Disconnect the ECU connector from ECU.
Is the continuity established between terminals (B–49)11 and
(B–49)22?
2 1. Connect the ECU connector.
2. Start the engine.
3. Set the TOD mode.
Does the voltage between terminals 11 and 22 indicate at least
0.4V?
3 Is the battery voltage always observed between terminals 11 and
22?
4 1. Disconnect the M–27 connector.
Is the continuity established between transfer connector
terminals (M–27)8 and (M–27)7?
5 1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
DRIVE LINE CONTROL SYSTEM (TOD)
Action Yes
Go to Step 2 Go to Step 4
The ECU has
failed. Replace
Go to Step 3 Go to Step 5
The phenomenon
reproduced.
The harness is
short–circuited on
"Troubles
the battery. intermittently
Repair the circuit.
observed".
Go to Step 5
Go to Step 4
Replace the
The harness is electromagnetic
broken. Repair coil (solenoid
the circuit.
Go to Step 5 Go to Step 5
Repeat the
"Diagnosis Flow". Return to Step 5
4B2–45
No
the ECU.
is not
Refer to
transfer
clutch).