Service Manual — page 710 of 715
Appendix › Troubleshooting Guide
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17-38 APPENDIX
Troubleshooting Guide
NOTE Spark plug dirty, broken, or gap malad-
○Refer to the Fuel System (DFI) chapter for justed
most of DFI trouble shooting guide. Spark plug incorrect
○This is not an exhaustive list, giving every Stick coil shorted or not in good contact
possible cause for each problem listed. It Stick coil trouble
is meant simply as a rough guide to assist ECU trouble
the troubleshooting for some of the more Neutral, starter lockout, or side stand switch
common difficulties. trouble
Crankshaft sensor trouble
Engine Doesn’t Start, Starting
Ignition switch or engine stop switch
Difficulty:
shorted
Starter motor not rotating:
Starter system wiring shorted or open
Ignition and engine stop switch not on
Main 30 A or ignition fuse blown
Starter lockout switch or neutral switch trou-
Fuel/air mixture incorrect:
ble
Bypass screw maladjusted
Starter motor trouble
Air passage clogged
Battery voltage low
Air cleaner clogged, poorly sealed, or miss-
Starter relay not contacting or operating
ing
Starter button not contacting
Leak from oil filler cap, crankcase breather
Starter system wiring shorted or open
hose or air cleaner drain hose.
Ignition switch trouble
Compression Low:
Engine stop switch trouble
Spark plug loose
Main 30 A or ignition fuse blown
Cylinder head not sufficiently tightened
Starter motor rotating but engine doesn’t
down
turn over:
Cylinder, piston worn
Vehicle-down sensor (DFI) coming off
Piston ring bad (worn, weak, broken, or
Immobilizer system trouble (Equipped Mod-
sticking)
els)
Piston ring/groove clearance excessive
Starter clutch trouble
Cylinder head gasket damaged
Starter idle gear trouble
Cylinder head warped
Engine won’t turn over:
Valve spring broken or weak
Valve seizure
No valve clearance
Valve lifter seizure
Valve not seating properly (valve bent,
Cylinder, piston seizure
worn, or carbon accumulation on the
Crankshaft seizure
seating surface)
Connecting rod small end seizure
Connecting rod big end seizure
Transmission gear or bearing seizure Poor Running at Low Speed:
Camshaft seizure Spark weak:
Starter idle gear seizure Battery voltage low
Balancer bearing seizure Immobilizer system trouble (Equipped Mod-
No fuel flow: els)
No fuel in tank Stick coil trouble
Fuel pump trouble Stick coil shorted or not in good contact
Fuel tank air vent obstructed Spark plug dirty, broken, or maladjusted
Fuel filter clogged Spark plug incorrect
Fuel line clogged ECU trouble
No spark; spark weak: Crankshaft sensor trouble
Vehicle-down sensor (DFI) coming off Fuel/air mixture incorrect:
Ignition switch not on Bypass screw maladjusted
Engine stop switch turned to stop position Air passage clogged
Clutch lever not pulled in or gear not in neu- Air bleed pipe bleed holes clogged
tral Pilot passage clogged
Battery voltage low Air cleaner clogged, poorly sealed, or miss-
Immobilizer system trouble (Equipped Mod- ing
els) Fuel tank air vent obstructed
Fuel pump trouble
Fuel to injector insufficient