Diagnosis From Symptom - Isuzu 2000 Trooper Workshop Manual

Diagnosis from Symptom

Troubles that are not indicated by the warning lamp are
listed in the table below. These troubles are caused by
the faults that cannot be detected by the self-diagnostic
function of the control unit.
If this type of trouble is observed, interview the customer
and conduct test runs to reproduce the trouble,
cross-check the reported trouble with the listed
phenomena, and diagnose and analyze the trouble on the
item by item basis.
Phenomena
1 The tight corner braking is
observed when the vehicle is
subject to full steering.
2 Even if the 4WD Auto Switch is
select to the 4WD position, the
4WD mode is not active, resulting
in remarkable rear wheel spin.
D When the 4WD Auto Switch is
3
select to the 4WD position, the
drive resistance of the 4WD
system is too large to get
sufficient running speed.
D Noised drive line.
4 The shift on the fly system (front
axle) generates gear noises.
5 The braking distance gets long
even when the ABS is active.
DRIVE LINE CONTROL SYSTEM (TOD)
Major cause
D The standard tires are not used.
D The tire pressure is incorrect.
D The tires are worn inuniformity.
D The transfer or wiring is
imperfect.
D The limited slip differential is
failed.
D The transfer or wiring is
imperfect.
D The shift on the fly system is
failed.
D The standard tires are not used.
D The tire pressure is incorrect.
D The tires are worn inuniformity.
D The transfer or wiring is
imperfect.
D The limited slip differential is
failed.
D The wiring is imperfect.
D The shift on the fly system is
failed.
D The wiring is imperfect.
D The ABS is failed.
4B2–83
Corrective action
Check and recondition the
vehicle according to Chart 1.
Check and recondition the
vehicle according to Chart 2.
Check and recondition the
vehicle according to Chart 1.
Check and recondition the
vehicle according to Chart 3.
Check and recondition the
vehicle according to Chart 4.