HOME 1.30 TROUBLESHOOTING GENERAL 9. Bank Angle Sensor tripped and ignition switch not cycled OFF then ON. Starts Hard The Troubleshooting section of this manual is a guide to diagnose problems. Read the appropriate sections of this manual before performing any work. Improper repair and/or maintenance could result in death or serious injury. (00528b) 1. Spark plugs in bad condition or have improper gap or are partially fouled. 2. Battery nearly discharged. 3. Loose wire connection at one of the battery terminals, coil(s) or ECM connector. The following check list of possible operating troubles and their probable causes will be helpful in keeping a motorcycle in good operating condition.
More than one of these conditions may be causing the trouble and all should be carefully checked. 4. Water or dirt in fuel system. 5. Intake air leak. NOTES 6. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow. • For further troubleshooting information, see the Electrical Diagnostics Manual. 7. Engine lubricant too heavy (winter operation). • For troubleshooting the cooling system, review the check list of operating troubles in 5.2 COOLANT FLOW NOTE ENGINE For cold weather starts, always disengage clutch. Starter Motor Does Not Operate or Does Not Turn Engine Over 8. Ignition not functioning properly (possible sensor failure). 9.
Faulty ignition coil(s). 10. Valves sticking or valves too tight. 1. Ignition switch not in ON position. 11. Rotor key sheared. 2. Engine run switch in OFF position. Starts But Runs Irregularly or Misses 3. Maxi-fuse not in place. 1. Spark plugs in bad condition or partially fouled. 4. Discharged battery, loose or corroded connections (solenoid chatters). 2. Spark plug gap too close or too wide. 5. Starter control circuit, relay, or solenoid faulty. 3. Faulty ignition coil(s), ECM, or sensor. 6. Electric starter shaft pinion gear not engaging or overrun- ning clutch slipping. 4. Battery nearly discharged. 5. Damaged wire or loose connection at battery terminals, coil(s) or ECM connector. 7.
Crankshaft locking pin is in place. 8. TSM/TSSM/HFSM Bank Angle Sensor tripped and ignition switch not cycled OFF then ON. 6. Intermittent short circuit due to damaged wire insulation. 7. Water or dirt in fuel system. Engine Turns Over But Does Not Start 8. Fuel tank vent system plugged. 9. Air leak at intake manifold or air filter. 1. Fuel tank empty. 2. Fuel filter clogged. 10. Loose or dirty ECM connector. 3. Fouled spark plugs. 11. Faulty Sensor(s): Manifold Absolute Pressure (MAP) or Crank Position (CKP). 4. Sticking or damaged valve. 5. Discharged battery, loose or broken battery terminal con- nections. 12. Incorrect valve timing. 13. Weak or broken valve springs. 6.
Engine lubricant too heavy (winter operation). 14. Damaged intake or exhaust valve. NOTE Spark Plug Fouls Repeatedly For cold weather starts, always disengage clutch. 1. Fuel mixture too rich. 7. Loose wire connection at coil(s), battery or ECM connector. 2. Incorrect spark plug for the kind of service. 8. Ignition timing incorrect due to faulty coil(s), ECM or sensors (MAP, CKP and/or TSM/TSSM/HFSM). 3. Piston rings badly worn or broken. 4. Valve guides or seals badly worn. 1-70 2009 VRSC Service: Maintenance