1998 ISUZU TROOPER Service Repair Manual

Page 1721 of 3573

ISUZU TROOPER 1998  Service Repair Manual QOS III PREHEATING SYSTEM 6D6 Ð 3
QOS III FLOW CHART

Page 1722 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6D6 Ð 4 QOS III PREHEATING SYSTEM
QOS III BLOCK CHART
“ST” detection“ST”
Indicator timer
11
1“ON”
“ST” “ON”13
tdDelay timer
¡C
td
¡CResetReset5
ta
Afterglow timer
Coolant temper

Page 1723 of 3573

ISUZU TROOPER 1998  Service Repair Manual QOS III PREHEATING SYSTEM 6D6 Ð 5
Inspection on QOSIII System Operation
I Inspection on Quick Heating Operation
1. Disconnect thermo-sensor connection on the
thermostat housing.
2. Connect the circui

Page 1724 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6D6 Ð 6 QOS III PREHEATING SYSTEM
8 (0.8/69)
Torque N·m (Kg·m/lb·in)
23 (2.3/17)
Torque N·m (Kg·m/lb·ft)
0.8 ~ 1.0
Resistance at normal temperature
LOCTITE #262
or equivalentWhen installing the

Page 1725 of 3573

ISUZU TROOPER 1998  Service Repair Manual  ENGINE EXHAUST 6F Ð 1
SECTION 6F
ENGINE EXHAUST
CAUTION:
overheating of the floor pan and possible damage
to the passenger compartment, insulation and trim
materials. Exhaust system components must

Page 1726 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6F Ð 2 ENGINE EXHAUST
GENERAL DESCRIPTION
150RV013
When inspecting or replacing exhaust system
components, make sure there is adequate clearance from
all points on the underbody to prevent overheatin

Page 1727 of 3573

ISUZU TROOPER 1998  Service Repair Manual  ENGINE EXHAUST 6F Ð 3
ON-VEHICLE SERVICE
Rattles and noise vibrations in the exhaust system
are usually caused by misalignment of parts.  When
aligning the system, leave all bolts or nuts loose
unti

Page 1728 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6F Ð 4 ENGINE EXHAUST
2. Front exhaust pipe fixing nuts
¥ Remove two bolts fixed from front pipe and center
pipe A.
3. Exhaust manifold fixing nuts
¥ Remove two fixing nuts from exhaust manifold an