Suzuki Liana RH418 Supplementary Service Manual page 47

Condition
Improper engine idling or
engine fails to idle
Possible cause
Faulty spark plug
Leaky or disconnected high-tension cord "High-Tension Cord Inspection in Section 1H in
Faulty ignition coil with ignitor
Fuel pressure out of specification
Leaky manifold, throttle body, or cylinder
head gasket
Faulty idle air control system
Faulty evaporative emission control
system
Faulty fuel injector(s)
Poor performance of ECT sensor, TP
sensor or MAP sensor
Faulty ECM
Loose connection or disconnection of
vacuum hoses
Malfunctioning PCV valve
Inoperative thermostat
Poor water pump performance
Clogged or leaky radiator
Improper engine oil grade
Clogged oil filter or oil strainer
Poor oil pump performance
Faulty radiator fan control system
Dragging brakes
Slipping clutch
Blown cylinder head gasket
Low compression
Camshaft position control system out of
order
Engine General Information and Diagnosis:
Correction / Reference Item
"Spark Plug Inspection in Section 1H in related
manual"
related manual"
"Ignition Coil Assembly (Including Igniter)
Inspection in Section 1H in related manual"
"Fuel Pressure Check"
"Idle Air Control System Check"
"EVAP Canister Purge Inspection in Section
1B in related manual"
"Fuel Injector Inspection in Section 1G"
"Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C in related manual",
"Throttle Position (TP) Sensor On-Vehicle
Inspection in Section 1C in related manual" or
"Manifold Absolute Pressure (MAP) Sensor
Inspection in Section 1C in related manual"
"PCV Valve Inspection in Section 1B in related
manual"
"Thermostat Inspection in Section 1F in related
manual"
"Water Pump Inspection in Section 1F in
related manual"
"Radiator On-Vehicle Inspection and Cleaning
in Section 1F in related manual"
"Engine Oil and Filter Change in Section 0B in
related manual"
"Engine Oil and Filter Change in Section 0B in
related manual" or "Oil Pan and Oil Pump
Strainer Cleaning in Section 1E in related
manual"
"Oil Pressure Check in Section 1E in related
manual"
"Radiator Fan Control System Check"
Condition "Dragging brakes" in "Brakes
Symptom Diagnosis in Section 4A in related
manual".
Condition "Slipping clutch" in "Clutch System
Symptom Diagnosis in Section 5C in related
manual".
Replace.
"Compression Check in Section 1D"
"Oil Control Valve Inspection in Section 1C"
1A-34