Isuzu Trooper 1999 Workshop Manual page 364

Step
1 1. Turn on the starter switch.
2. Set the transfer to the 2H mode.
Is the battery voltage observed between terminals 5 and 19?
2 Is the battery voltage observed between terminals 10 and 19?
3 1. Set the transfer to the high (TOD) mode.
Does the voltage between terminals 5 and 19 indicate 0V?
4 Does the voltage between terminals 10 and 19 indicate 0V?
5 Does the TOD indicator show the 2H mode?
6 Set the transfer to the high (TOD) mode.
Does the voltage between terminals 5 and 19 indicate 0V?
7 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 5
Go to Step 3 Go to Step 6
The ECU has
failed. Replace
Go to Step 4
Go to Step 7
The phenomenon
is not
The shift on the
reproduced. fly system is
Refer to
failed (refer to
"Troubles Section 4C "Front
intermittently
Axle" of Chassis
observed".
Repair Manual).
Go to Step 7
Go to Step 7
See "Fault
Diagnosis from
The ECU has Lighting Status of
failed. Replace TOD Indicator
the ECU.
Go to Step 7 Go to Step 7
The shift on the
fly system has
failed (refer to
The ECU has
Section 4C "Front
Axle" of Chassis failed. Replace
Repair Manual).
Go to Step 7
Go to Step 7
Repeat the "Fault
Diagnosis Flow". Return to Step 7
4B2–51
No
the ECU.
Lamps".
the ECU.