Suzuki Liana RH418, Supplementary Service Manual

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1A-27 Engine General Information and Diagnosis:
Engine Symptom Diagnosis
S3RH0B1104010
Perform troubleshooting referring to the followings when ECM has detected no DTC and no abnormality has been
found in “Visual Inspection” and “Engine Basic Inspection”.
Condition Possible cause Correction / Reference Item
Hard starting (Engine
cranks OK) Faulty spark plug “Spark Plug Inspection in Section 1H in related
manual”
Leaky high-tension cord “High-Tension Cord Inspection in Section 1H in
related manual”
Loose connection or disconnection of
high-tension cords or lead wires “High-Tension Cord Inspection in Section 1H in
related manual”
Faulty ignition coil “Ignition Coil Assembly (Including Igniter)
Inspection in Section 1H in related manual”
Dirty or clogged fuel hose or pipe “Fuel Pressure Check”
Malfunctioning fuel pump “Fuel Pressure Check”
Air inhaling from intake manifold gasket
or throttle body gasket
Faulty idle air control system
“Idle Air Control System Check”
Faulty ECT sensor or MAP sensor “Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C in related manual” or
“Manifold Absolute Pressure (MAP) Sensor
Inspection in Section 1C in related manual”
Faulty ECM
Low compression
“Compression Check in Section 1D”
Poor spark plug tightening or faulty
gasket “Spark Plug Inspection in Section 1H in related
manual”
Compression leak from valve seat “Valves and Valve Guides Inspection in
Section 1D”
Sticky valve stem “Valves and Valve Guides Inspection in
Section 1D”
Weak or damaged valve springs “Valve Spring Inspection in Section 1D”
Compression leak at cylinder head
gasket “Cylinder Head Inspection in Section 1D”
Sticking or damaged piston ring “Cylinders, Pistons and Piston Rings
Inspection in Section 1D”
Worn piston, ring or cylinder “Cylinders, Pistons and Piston Rings
Inspection in Section 1D”
Malfunctioning PCV valve “PCV Valve Inspection in Section 1B in related
manual”
Camshaft position control system out of
order “Oil Control Valve Inspection in Section 1C”
Low oil pressure Improper oil viscosity “Engine Oil and Filter Change in Section 0B in
related manual”
Malfunctioning oil pressure switch “Oil Pressure Switch On-Vehicle Inspection in
Section 9C in related manual”
Clogged oil strainer “Oil Pan and Oil Pump Strainer Cleaning in
Section 1E in related manual”
Functional deterioration of oil pump “Oil Pump Inspection in Section 1E in related
manual”
Worn oil pump relief valve “Oil Pump Inspection in Section 1E in related
manual”
Excessive clearance in various sliding
parts