Yamaha YZF-R1 2007 Service Manual

IGNITION SYSTEM8-3EAS27150TROUBLESHOOTINGThe ignition system fails to operate (no spark or intermittent spark).NOTE:• Before troubleshooting, remove the following part(s):1 Rider seat2 Passenger seat3 Fuel tank4 Side cowlingsNG→OK↓NG→OK↓NG→OK↓NG→OK↓NG→OK↓NG→OK↓NG→OK↓1 Check the fuses.(Main and ignition)Refer to "CHECKING THE FUSES"on page 8-89.Replace the fuse(s).2 Check the battery.Refer to "CHECKING ANDCHARGING THE BATTERY" onpage 8-89.• Clean the battery terminals.• Recharge or replace the battery.3 Check the spark plugs.Refer to "CHECKING THE SPARKPLUGS" on page 3-10. Re-gap or replace the spark plugs.4 Check the ignition spark gap.Refer to "CHECKING THE IGNI-TION COILS" on page 8-95.Ignition system is OK.5 Check the ignition coils.Refer to "CHECKING THE IGNI-TION COILS" on page 8-95.Replace the ignition coils.6 Check the crankshaft position sen-sor.Refer to "CHECKING THECRANKSHAFT POSITION SEN-SOR" on page 8-96.Replace the crankshaft position sen-sor.7 Check the main switch.Refer to "CHECKING THESWITCHES" on page 8-85.Replace the main switch/immobilizerunit assembly.Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk