Suzuki GA413, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-27
GA413
supple
Condition Possible Cause Reference Item
Overheating Inoperative thermostat
Faulty radiator fan motor or its circuit
Loose or slip water pump belt
Poor water pump performance
Clogged or leaky radiator
Improper engine oil grade
Clogged oil filter or oil strainer
Poor oil pump performance
Dragging brakes
Slipping clutch
Blown cylinder head gasket
Thermostat in Section 6B.
Radiator fan control system check in
Section 6E.
ITEM1-1 Drive belt inspection and
change in Section 0B.
Water pump in Section 6B.
Radiator in Section 6B.
ITEM1-4 Engine oil and oil filter change
in Section 0B.
Oil pressure check in Section 6A.
Oil pressure check in Section 6A.
Diagnosis in Section 5.
Diagnosis in Section 7C.
Valves and cylinder head inspection in
Section 6A.
Poor gasoline mileage Ignition system out of order.
Faulty ignition coil or high-tension cord
Engine and emission control system out
of order.
Fuel pressure out of specification
Faulty TP sensor, ECT sensor or MAP
sensor
Faulty injector
Faulty ECM
Malfunctioning EGR valve (if equipped)
High idle speed
Low compression
Others
Poor valve seating
Dragging brakes
Slipping clutch
Thermostat out of order
Improper tire pressure
Diagnosis in Section 6F.
Diagnostic Flow Table B-3
TP sensor, ECT sensor or MAP sensor
in Section 6E.
Diagnostic Flow Table B-1
Inspection of ECM and its circuit in
Section 6E.
EGR system in Section 6E.
Refer to item “Improper engine idle
speed” previously outlined.
Previously outlined.
Valves and cylinder head in Section 6A.
Diagnosis in Section 5.
Diagnosis in Section 7C.
Thermostat in Section 6B.
Refer to Section 3F.