Isuzu 2000 Trooper Workshop Manual page 426

4B2–48 DRIVE LINE CONTROL SYSTEM (TOD)
Check flow Trouble code Phenomenon Standard
11 28 The shift on the fly system (front —
hub) works incorrectly.
NOTE: The shift on the fly system is not changed
between 2WD and 4WD modes normally.
CAUTION: If code 32 or 33 is also observed, remove
the trouble associated with code 32 or 33 first.
D04RY00008