Suzuki WagonR+ RB310 Service Manual page 2382

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)
Possible Cause
Ignition system out of order
D Faulty spark plug
D Leaky high-tension cord
D Loose connection or disconnection of high-
tension cords or lead wires
D Faulty ignition coil
Fuel system out of order
D Dirty or clogged fuel hose or pipe
D Malfunctioning fuel pump
D Air inhaling from intake manifold gasket or
throttle body gasket
Engine and emission control system out of
order
D Faulty idle air control system
D Faulty ECT sensor or MAP sensor
D Faulty ECM
Low compression
D Poor spark plug tightening or faulty gasket
D Compression leak from valve seat
D Sticky valve stem
D Weak or damaged valve springs
D Compression leak at cylinder head gasket
D Sticking or damaged piston ring
D Worn piston, ring or cylinder
Others
D Malfunctioning PCV valve
ENGINE DIAGNOSIS 6-23
Referring Item
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 6E
Compression check in Section
6A1
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 6E