Isuzu 2000 Trooper Workshop Manual page 411

DRIVE LINE CONTROL SYSTEM (TOD)
4B2–33
Check flow Trouble code Phenomenon Standard
Hi level : 4.5 ∼ 6.0 V
3 16 The front speed sensor no pulse.
Lo level : 0.7 ∼ 2.0 V
Frequency (F) =
766 Hz (at 30 mile/h)
NOTE: Find the trouble in which the pulse corresponding
to the running speed is not input.
D04RY00004