Engine Diagnosis Table - Suzuki Ignis Service Manual

6-26 ENGINE GENERAL INFORMATION AND DIAGNOSIS

ENGINE DIAGNOSIS TABLE

Perform troubleshooting referring to following table when ECM has detected no DTC and no abnormality has
been found in visual inspection and engine basic inspection previously.
Condition
Hard Starting
(Engine cranks OK)
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
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
Low compression
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
Spark plugs in Section 6F1.
High-tension cords in Section 6F1.
High-tension cords in Section 6F1.
Ignition coil in Section 6F1.
Diagnostic Flow Table B-3.
Diagnostic Flow Table B-3.
Diagnostic Flow Table B-4.
ECT sensor or MAP sensor in Section
6E1.
Spark plugs in Section 6F1.
Valves inspection in Section 6A1.
Valves inspection in Section 6A1.
Valve springs inspection in Section
6A1.
Cylinder head inspection in Section
6A1.
Cylinders, pistons and piston rings
inspection in Section 6A1.
Cylinders, pistons and piston rings
inspection in Section 6A1.
PCV system in Section 6E1.
Compression check in Section 6A1.
Engine oil and oil filter change in Sec-
tion 0B.
Oil pressure switch inspection in Sec-
tion 8.
Oil pan and oil pump strainer cleaning
in Section 6A1.
Oil pump in Section 6A1.
Oil pump in Section 6A1.