Isuzu Trooper 1999 Workshop Manual page 348

Step
1 1. Connect TECH 2.
While running in TOD mode, does TECH–2's front speed sensor
indication change with vehicle speed?
2 Is the continuity harness of terminal 24 (vehicle side terminal of
the front speed sensor)?
3 1. Clear the trouble code.
While running at 40 kph in TOD mode for 30 consecutive sec, is
trouble code reissued?
4 1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
DRIVE LINE CONTROL SYSTEM (TOD)
Action Yes
Repair and
inspection front
speed sensor
tone wheel.
Go to Step 2 Go to Step 4
Replace speed
sensor.
Repair the circuit.
Go to Step 3
Go to Step 3
Replace ECU.
Go to Step 4 Go to Step 4
The trouble is not
reproduced.
"Troubles
intermittently
observed".
Repeat the "Fault
Diagnosis Flow". Return to Step 4
4B2–35
No
Refer to