2.24 Troubleshooting

Fragment manuala — str. 74–76

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TROUBLESHOOTING 2.24

GENERAL 12. Fuel filter clogged.
13. Sticking or damaged valve(s).
A WARNING
14. Plugged fuel injectors.
The Troubleshooting section of this manual is a guide to
diagnose problems. Read the appropriate sections of this Starts Hard
manual before performing any work. Improper repair and/or
1. Spark plugs in bad condition or have improper gap or are
maintenance could result in death or serious injury.
partially fouled.
(00528b)
2. Spark plug cables in poor condition.
Use the symptoms listed for general troubleshooting. More 3. Battery nearly discharged.
than one condition may be present at a time. Check all possible
items to keep motorcycle in good operating condition. 4. Damaged wire or loose wire connection at ignition coil,
battery or ECM connector.
NOTE 5. Water or dirt in fuel system.
See the electrical diagnostic manual for additional information.
6. Intake air leak.
ENGINE 7. Fuel tank vent hose, filler cap vent or vapor valve plugged,
or fuel line closed off, restricting fuel flow.
Starter Motor Does Not Operate or Does Not 8. Engine lubricant too heavy (winter operation).
Turn Engine Over
9. Ignition not functioning properly (possible sensor failure).
1. Engine run switch in OFF position.
10. Faulty ignition coil.
2. Discharged battery, loose or corroded connections
(solenoid chatters). 11. Valves sticking.

3. Starter control circuit faulty. 12. Partially plugged fuel injector(s).

4. Overrunning clutch slipping. Starts But Runs Irregularly or Misses
5. Inertial Measurement Unit (IMU) tripped and ignition not 1. Spark plugs in poor condition or partially fouled.
cycled OFF then back to RUN.
2. Spark plug cables in poor condition and shorting or leaking.
6. Security system activated.
3. Spark plug gap too close or too wide.
7. Motorcycle in gear and clutch not pulled in.
4. Follow any current DTC's in order of priority.
8. Jiffy stand down and transmission in gear (HDI models
only). 5. Faulty ignition coil, ECM or sensor.

9. Main fuse not in place. 6. Battery nearly discharged.
7. Damaged wire or loose wire connection at ignition coil,
Engine Turns Over But Does Not Start battery or ECM connector.
1. Fuel tank empty. 8. Intermittent short circuit due to damaged wire insulation.
2. Fouled spark plugs. 9. Water or dirt in fuel system.
3. Discharged battery, loose or damaged battery terminal 10. Fuel tank vent system plugged.
connections.
11. Air leak at intake manifold or air cleaner.
4. The engine lubricant too heavy (winter operation).
12. Loose or dirty ECM connector.
5. Spark plug cables in bad condition and shorting, cable
connections loose or cables connected to incorrect 13. Incorrect valve timing.
cylinders. 14. Weak or damaged valve springs.
6. Damaged wire or loose wire connection at ignition coil, 15. Manually check compression and leak down to verify they
battery or ECM connector. are in specification.
7. Follow any current DTC's in order of priority. 16. Damaged intake or exhaust valve.
8. Ignition timing incorrect due to faulty ignition coil, ECM or 17. Partially plugged fuel injector(s).
sensors.
9. Inertial Measurement Unit (IMU) tripped and ignition not A Spark Plug Fouls Repeatedly
cycled OFF then back to RUN. 1. Fuel mixture too rich.
1O. Manually check fuel pressure to verify it is in specification. 2. Incorrect spark plug for the kind of service.
11. Manually check compression and leak down to verify they 3. Piston rings badly worn or damaged.
are in specification.
4. Valve guides or seals badly worn.

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Pre-Ignition or Detonation (Knocks or Pings) LUBRICATION SYSTEM
1. Fuel octane rating too low.
2. Faulty spark plugs. Engine Oil Not Circulating (Oil Pressure
Indicator Lit)
3. Incorrect spark plug for the kind of service.
1. Insufficient or diluted oil supply.
4. Excessive carbon deposit on piston head or in combustion
chamber. 2. Grounded oil signal switch wire or faulty signal switch.

5. Ignition timing advanced due to faulty sensor inputs (TMAP 3. Oil pump problem.
and/or CKP).
Oil Does Not Return To Crankcase Oil Reservoir
6. Ignition timing advanced due to ECM or sensors (CKP,
ET or TMAP) defective. 1. Crankcase oil reservoir empty.

7. Intake manifold vacuum leak. 2. Oil pump not functioning.
3. Restricted oil lines or fittings.
Overheating
4. Restricted oil filter.
1. Insufficient oil supply or oil not circulating.
5. O-ring damaged or missing from oil pump/crankcase
2. Insufficient air flow through radiator during extended junction (also results in poor engine performance).
periods of idling (cooling fan inoperative).
3. Heavy carbon deposits. Engine Uses Too Much Oil Or Smokes
Excessively
4. Ignition timing retarded due to defective ECM or faulty
sensor(s) (TMAP and/or CKP). 1. Oil reservoir overfilled.

5. Leaking valve(s). 2. Restricted oil return line to oil reservoir.

6. Low coolant level. 3. Restricted breather operation.

7. Restricted radiator air flow. 4. Restricted oil filter.

8. Coolant pump or fans inoperative. 5. Oil pump in poor condition.

9. Vent hose crimped. 6. Piston rings badly worn or broken.

10. Air in coolant. 7. Valve guides or seals worn or damaged.
8. O-ring damaged or missing from oil pump/crankcase
Valve Train Noise junction (also results in poor engine performance).
1. Low oil pressure caused by oil feed pump not functioning 9. Plugged crankcase scavenge ports.
properly or oil passages obstructed.
10. Oil diluted with gasoline.
2. Valve sticking in guide.
3. Chain tensioning shoe worn. Engine Leaks Oil From Cases, Etc.
4. Cam(s) or cam gear(s) worn. 1. Loose parts.

5. Cam timing incorrect. 2. Imperfect seal at gaskets, washers, etc.
6. Valve seat loose in cylinder. 3. Restricted breather passages or hose to air cleaner.
4. Restricted oil filter.
Excessive Vibration
5. Oil reservoir overfilled.
1. Wheels bent or damaged and/or tires worn or damaged.
6. Restricted oil return line to oil reservoir.
2. Engine/Transmission/Rear Wheel not aligned properly.
7. Porosity.
3. Ignition timing advanced due to faulty sensor inputs (MAP
and/or CKP)/poorly tuned engine. Low Oil Pressure
4. Internal engine problem. 1. Oil reservoir underfilled.
5. Damaged frame. 2. Faulty low oil pressure switch.
6. Rear fork pivot shaft fasteners loose. 3. Oil pump cover seal damaged or missing.
7. Exhaust system binding and causing unnecessary side 4. Bypass valve stuck in open position.
loads.
5. Ball(s) and/or plug(s) missing in drillings.
Check Engine Light Illuminates During 6. Worn oil pump gerotor(s).
Operation
7. Oil diluted with gasoline.
Fault detected. For diagnostic information see the electrical
diagnostic manual. High Oil Pressure
1. Oil reservoir overfilled.

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2. Bypass valve stuck in closed position. HANDLING
ELECTRICAL SYSTEM
Irregularities
Alternator Does Not Charge 1. Improperly loaded motorcycle. Non-standard equipment
1. Regulator not grounded. on the front end such as heavy radio receivers, extra
lighting equipment or luggage tends to cause unstable
2. Engine ground wire loose or damaged. handling.
3. Loose or damaged wires in charging circuit. 2. Damaged tire(s) or improper front-rear tire combination.

Alternator Charge Rate is Below Normal 3. Irregular or peaked front tire tread wear.

1. Weak battery. 4. Incorrect tire pressure. See Tires (Page 2-9)

2. Excessive use of add-on accessories. 5. Shock absorber not functioning normally.

3. Loose or corroded connections. 6. Loose wheel axle nuts. Tighten to recommended torque
specification.
4. Extensive periods of idling or low speed riding.
7. Rear wheel out of alignment with frame and front wheel.
TRANSMISSION 8. Steering head bearings improperly adjusted. Correct
adjustment and replace pitted or worn bearings and races.
Transmission Shifts Hard 9. Loose spokes (laced wheel vehicles only).
1. Clutch controls or clutch cable improperly adjusted. 10. Tire and wheel unbalanced.
2. Damaged shift lever linkage. 11. Rims and tires out-of-round or eccentric with hub.

Transmission Jumps Out of Gear 12. Rims and tires out-of-true sideways.

1. Worn shifter dogs in transmission. 13. Rear fork pivot-improper torque.
14. Incorrect, non-specified tire(s) mounted on front or rear
Clutch Slips wheel.
1. Clutch controls or clutch cable improperly adjusted. BRAKES
2. Worn friction discs.
3. Insufficient clutch spring tension. Brakes Do Not Hold Normally
1. Master cylinder low on fluid, system leaking or pads worn.
Clutch Drags or Does Not Release
2. Brake line contains air bubbles.
1. Clutch controls or clutch cable improperly adjusted.
3. Master cylinder piston worn or parts damaged.
2. Clutch discs warped.
4. Brake pads contaminated with grease or oil.
Clutch Chatters 5. Brake pads badly worn.
1. Friction discs or steel discs worn or warped. 6. Brake disc badly worn or warped.
7. Brake fades due to heat build up-Excessive braking or
brake pads dragging.
8. Brake drags-insufficient brake pedal or hand lever free
play, caliper piston worn or damaged, or excessive brake
fluid in reservoir.

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