Suzuki Liana RH418, Supplementary Service Manual

Page: 43 / 371

Engine General Information and Diagnosis: 1A-30
Poor gasoline mileage Leaks or loose connection of high-
tension cord “High-Tension Cord Inspection in Section 1H in
related manual”
Faulty spark plug (improper gap, heavy
deposits and burned electrodes, etc.) “Spark Plug Inspection in Section 1H in related
manual”
Faulty ignition coil with ignitor “Ignition Coil Assembly (Including Igniter)
Inspection in Section 1H in related manual”
Fuel pressure out of specification “Fuel Pressure Check”
Leaky manifold, throttle body, or cylinder
head gasket
Faulty idle air control system
“Idle Air Control System Check”
Faulty evaporative emission control
system “EVAP Canister Purge Valve Inspection in
Section 1B in related manual”
Faulty fuel injector(s) “Fuel Injector Inspection in Section 1G”
Poor performance of ECT sensor, TP
sensor or MAP sensor “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”
Faulty ECM
Loose connection or disconnection of
vacuum hoses
Malfunctioning PCV valve
“PCV Valve Inspection in Section 1B in related
manual”
Inoperative thermostat “Thermostat Inspection in Section 1F in related
manual”
Poor water pump performance “Water Pump Inspection in Section 1F in
related manual”
Clogged or leaky radiator “Radiator On-Vehicle Inspection and Cleaning
in Section 1F in related manual”
Improper engine oil grade “Engine Oil and Filter Change in Section 0B in
related manual”
Clogged oil filter or oil strainer “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”
Poor oil pump performance “Oil Pressure Check in Section 1E in related
manual”
Faulty radiator fan control system “Radiator Fan Control System Check”
Dragging brakes Condition “Dragging brakes” in “Brakes
Symptom Diagnosis in Section 4A in related
manual”.
Slipping clutch Condition “Slipping clutch” in “Clutch System
Symptom Diagnosis in Section 5C in related
manual”.
Blown cylinder head gasket Replace.
Low compression “Compression Check in Section 1D”
Faulty fuel injector(s) “Fuel Injector Inspection in Section 1G”
Poor valve seating “Valves and Valve Guides Inspection in
Section 1D”
Improper tire pressure Adjust.
Camshaft position control system out of
order “Oil Control Valve Inspection in Section 1C”
Excessive engine oil
consumption – Oil
leakage Blown cylinder head gasket Replace.
Leaky camshaft oil seals Replace.
Condition Possible cause Correction / Reference Item