Isuzu 2000 Trooper Workshop Manual page 418

4B2–40 DRIVE LINE CONTROL SYSTEM (TOD)
Step
1 1. Start the engine.
Does the voltage between terminals 12 and 13 meet the standard
5V?
2 Is the voltage below the standard?
3 1. Turn off the starter switch.
2. Disconnect the ECU connector.
Is the continuity established between vehicle harness terminals
(B–49)12 and (B–48)24?
4 1. Disconnect the H-17 connector.
Is the continuity established between floor harness connector
terminals (H-17)1 and (H-17)8?
5 1. Disconnect the M-27 connector.
Is the continuity established between transfer harness connector
terminals (M–27)2 and (M–27)7?
6 1. Disconnect the M-27 connector.
Is the continuity established between transfer harness connector
terminals (M–27)1 and (M–27)7?
7 1. Turn off the starter switch.
2. Disconnect the ECU connector.
3. Turn on the starter switch.
Is the battery voltage observed between harness connector
terminals (B–49)12 and (B–48)24?
8 1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Action Yes
Go to Step 8 Go to Step 2
Go to Step 3 Go to Step 7
The ECU is
failed. Replace
the ECU.
Go to Step 4 Go to Step 8
Go to Step 5 Go to Step 6
The reference
harness for the
front speed
sensor is
short–circuited to
Replace the front GND. Repair the
speed sensor.
Go to Step 8 Go to Step 8
The reference
harness for the
front speed
sensor is
short–circuited to
Replace the rear GND. Repair the
speed sensor.
Go to Step 8 Go to Step 8
The ECU has
Repair the
failed. Replace
harness circuit.
the ECU.
Go to Step 8 Go to Step 8
Repeat the
"Diagnosis Flow" Go to Step 8
No
circuit.
circuit.