3-22 FUEL SYSTEM (EFI)
Symptoms or possible Causes Actions (chapter)
Clutch lever not pulled in and gear not in neutral
whether sidestand up or not
Pull the lever in and shift the gear in neutral.
Though clutch lever pulled in, sidestand up and
gear not in neutral
Sidestand down and clutch lever pulled in whether
gear in neutral or not
Vehicle-down-sensor coming off Reinstall (see chapter 3).
Vehicle-down-sensor trouble Inspect (see chapter 3).
ECU ground or power supply trouble Inspect (see chapter 3).
Battery voltage low Inspect and charge (see chapter 16).
Spark plug dirty, broken or gap maladjusted Replace (see chapter 2).
Stick coil trouble Inspect stick coil (see chapter 16).
Stick coil shorted or not in good contact Reinstall or inspect stick coil (see chapter 16).
Spark plug incorrect Replace it with the correct plug (see chapter 16).
IC igniter in ECU trouble Inspect (see chapter 16).
Neutral, starter lockout or sidestand switch trouble Inspect each switch (see chapter 16).
Crankshaft sensor trouble Inspect (see chapter 16).
Stick coil trouble Inspect (see chapter 16).
Ignition switch shorted Inspect and replace (see chapter 16).
Engine stop switch shorted Inspect and repair or replace (see chapter 2).
Starter system wiring shorted or open Inspect and repair or replace (see chapter 16).
Main 30A or ignition fuse blown Inspect and replace (see chapter 16).
Fuel/air mixture incorrect:
Air cleaner clogged, poorly sealed or missing Clean or reinstall (see chapter 3).
Leak from oil fi ller cap, crankcase breather hose or
air cleaner drain hose
Inspect and repair or replace (see chapter 3).
Water or foreign matter in fuel
Change fuel. Inspect and clean fuel system (see
chapter 3).
Fuel pressure regulator trouble
Inspect fuel pressure and replace fuel pump (see
chapter 3).
Main throttle sensor trouble Inspect (see chapter 3).
Fuel pressure may be low Inspect (see chapter 3).
Fuel pump trouble Inspect (see chapter 3).
Fuel injector trouble Inspect (see chapter 3).
Inlet air pressure sensor trouble Inspect (see chapter 3).
Inlet air temperature sensor trouble Inspect (see chapter 3)
Water temperature sensor trouble Inspect (see chapter 3).
Crankshaft sensor trouble Inspect (see chapter 3).
Compression low:
Spark plug loose Reinstall (see chapter 16).
Cylinder head not suffi ciently tightened down Tighten (see chapter 5).
Cylinder, piston worn Inspect and replace (see chapter 5).
Piston ring bad (worn, weak, broken or sticking) Inspect and replace (see chapter 5).
Piston ring/groove clearance excessive Inspect and replace (see chapter 5).
Cylinder head gasket damaged Replace (see chapter 5).
Cylinder head warped Inspect and replace (see chapter 5).
No valve clearance Adjust (see chapter 2).
Valve guide worn Inspect and replace (see chapter 5).
Valve spring broken or weak Inspect and replace (see chapter 5).
Valve not seating properly (valve bent, worn or
carbon accumulating on seating surface)
Inspect and repair or replace (see chapter 5).
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