Engine Symptom Diagnosis - Suzuki Liana RH418 Supplementary Service Manual

1A-27 Engine General Information and Diagnosis:

Engine Symptom Diagnosis

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
Hard starting (Engine
cranks OK)
Low oil pressure
Possible cause
Faulty spark plug
Leaky high-tension cord
Loose connection or disconnection of
high-tension cords or lead wires
Faulty ignition coil
Dirty or clogged fuel hose or pipe
Malfunctioning fuel pump
Air inhaling from intake manifold gasket
or throttle body gasket
Faulty idle air control system
Faulty ECT sensor or MAP sensor
Faulty ECM
Low compression
Poor spark plug tightening or faulty
gasket
Compression leak from valve seat
Sticky valve stem
Weak or damaged valve springs
Compression leak at cylinder head
gasket
Sticking or damaged piston ring
Worn piston, ring or cylinder
Malfunctioning PCV valve
Camshaft position control system out of
order
Improper oil viscosity
Malfunctioning oil pressure switch
Clogged oil strainer
Functional deterioration of oil pump
Worn oil pump relief valve
Excessive clearance in various sliding
parts
Correction / Reference Item
"Spark Plug Inspection in Section 1H in related
manual"
"High-Tension Cord Inspection in Section 1H in
related manual"
"High-Tension Cord Inspection in Section 1H in
related manual"
"Ignition Coil Assembly (Including Igniter)
Inspection in Section 1H in related manual"
"Fuel Pressure Check"
"Fuel Pressure Check"
"Idle Air Control System Check"
"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"
"Compression Check in Section 1D"
"Spark Plug Inspection in Section 1H in related
manual"
"Valves and Valve Guides Inspection in
Section 1D"
"Valves and Valve Guides Inspection in
Section 1D"
"Valve Spring Inspection in Section 1D"
"Cylinder Head Inspection in Section 1D"
"Cylinders, Pistons and Piston Rings
Inspection in Section 1D"
"Cylinders, Pistons and Piston Rings
Inspection in Section 1D"
"PCV Valve Inspection in Section 1B in related
manual"
"Oil Control Valve Inspection in Section 1C"
"Engine Oil and Filter Change in Section 0B in
related manual"
"Oil Pressure Switch On-Vehicle Inspection in
Section 9C in related manual"
"Oil Pan and Oil Pump Strainer Cleaning in
Section 1E in related manual"
"Oil Pump Inspection in Section 1E in related
manual"
"Oil Pump Inspection in Section 1E in related
manual"
S3RH0B1104010