Yamaha XT660X(S) Automobile User Manual


 
9 - 2
TRBL
SHTG
STARTING FAILURES/
INCORRECT ENGINE IDLING SPEED
ELECTRICAL SYSTEMS
Battery
Discharged battery
Faulty battery
Fuse(s)
Blown, damaged or incorrect fuse
Improperly installed fuse
Spark plug
Incorrect spark plug gap
Incorrect spark plug heat range
Fouled spark plug
Worn or damaged electrode
Worn or damaged insulator
Faulty spark plug cap
Ignition coil
Cracked or broken ignition coil body
Broken or shorted primary or secondary
coils
Faulty spark plug lead
Ignition system
Faulty ECU
Faulty crankshaft position sensor
Broken A.C. magneto rotor woodruff key
Switches and wiring
Faulty main switch
Faulty engine stop switch
Broken or shorted wiring
Faulty neutral switch
Faulty start switch
Faulty sidestand switch
Faulty clutch switch
Improperly grounded circuit
Loose connections
Starting system
Faulty starter motor
Faulty starter relay
Faulty starting circuit cut-off relay
Faulty starter clutch
EAS00846
INCORRECT ENGINE IDLING SPEED
ENGINE
Cylinder and cylinder head
Incorrect valve clearance
Damaged valve train components
Air filter
Clogged air filter element
FUEL SYSTEM
Throttle body
Damaged or loose throttle body joint
Improperly adjusted engine idling speed
(throttle stop screw)
Improper throttle cable free play
Flooded throttle body
Faulty air induction system
ELECTRICAL SYSTEMS
Battery
Discharged battery
Faulty battery
Spark plug
Incorrect spark plug gap
Incorrect spark plug heat range
Fouled spark plug
Worn or damaged electrode
Worn or damaged insulator
Faulty spark plug cap
Ignition coil
Broken or shorted primary or secondary
coils
Faulty spark plug lead
Cracked or broken ignition coil
Ignition system
Faulty ECU
Faulty crankshaft position sensor
Broken A.C. magneto rotor woodruff key