Yamaha Yzf R1 2007 Manual
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IGNITION SYSTEM 8-2 1. Main switch 4. Main fuse 8. Battery 12.Starting circuit cut-off relay 13.Neutral switch 14.Sidestand switch 19.ECU (engine control unit) 20.Ignition coil #1 21.Ignition coil #2 22.Ignition coil #3 23.Ignition coil #4 24.Spark plug 35.Crankshaft position sensor 40.Lean angle sensor 58.Engine stop switch 64.Clutch switch 79.Ignition fuse 88.Ground 89.Battery negative lead
IGNITION SYSTEM 8-3 EAS27150 TROUBLESHOOTING The ignition system fails to operate (no spark or intermittent spark). NOTE: Before troubleshooting, remove the following part(s): 1Rider seat 2 Passenger seat 3 Fuel tank 4 Side cowlings NG→ 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 8-85.Replace the fuse(s). 2 Check the battery. Refer to CHECKING AND CHARGING THE BATTERY on page 8-85. Clean the battery terminals. Recharge or replace the battery. 3 Check the spark plugs. Refer to CHECKING THE SPARK PLUGS on page 3-9.Re-gap or replace the spark plugs. 4 Check the ignition spark gap. Refer to CHECKING THE IGNI- TION COILS on page 8-91.Ignition system is OK. 5 Check the ignition coils. Refer to CHECKING THE IGNI- TION COILS on page 8-91.Replace the ignition coils. 6 Check the crankshaft position sen- sor. Refer to CHECKING THE CRANKSHAFT POSITION SEN- SOR on page 8-92.Replace the crankshaft position sen- sor. 7 Check the main switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the main switch/immobilizer unit assembly.
IGNITION SYSTEM 8-4 NG→ OK↓ NG→ OK↓ NG→ OK↓ NG→ OK↓ NG→ OK↓ NG→ OK↓ NG→ OK↓ 8 Check the engine stop switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the right handlebar switch. 9 Check the neutral switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the neutral switch. 10 Check the sidestand switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the sidestand switch. 11 Check the clutch switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the clutch switch. 12 Check the starting circuit cut-off relay. Refer to CHECKING THE RELAYS on page 8-88.Replace the starting circuit cut-off relay. 13 Check the lean angle sensor. Refer to CHECKING THE LEAN ANGLE SENSOR on page 8-92.Replace the lean angle sensor. 14 Check the entire ignition system’s wiring. Refer to CIRCUIT DIAGRAM on page 8-1.Properly connect or repair the ignition system’s wiring Replace the ECU.
ELECTRIC STARTING SYSTEM 8-5 EAS27160 ELECTRIC STARTING SYSTEM EAS27170 CIRCUIT DIAGRAM
ELECTRIC STARTING SYSTEM 8-6 1. Main switch 4. Main fuse 8. Battery 10.Starter relay 11.Starter motor 12.Starting circuit cut-off relay 13.Neutral switch 14.Sidestand switch 58.Engine stop switch 59.Start switch 64.Clutch switch 79.Ignition fuse 88.Ground 89.Battery negative lead
ELECTRIC STARTING SYSTEM 8-7 EAS27180 STARTING CIRCUIT CUT-OFF SYSTEM OPERATION If the engine stop switch is set to “ ” and the main switch is set to “ON” (both switches are closed), the starter motor can only operate if at least one of the following conditions is met: The transmission is in neutral (the neutral switch is closed). The clutch lever is pulled to the handlebar (the clutch switch is closed) and the sidestand is up (the sidestand switch is closed). The starting circuit cut-off relay prevents the starter motor from operating when neither of these con- ditions has been met. In this instance, the starting circuit cut-off relay is open so current cannot reach the starter motor. When at least one of the above conditions has been met the starting circuit cut-off relay is closed and the engine can be started by pressing the starter switch.
ELECTRIC STARTING SYSTEM 8-8 a. WHEN THE TRANSMISSION IS IN NEU- TRAL b. WHEN THE SIDESTAND IS UP AND THE CLUTCH LEVER IS PULLED TO THE HANDLEBAR 1. Battery 2. Main fuse 3. Main switch 4. Ignition fuse 5. Engine stop switch 6. Starting circuit cut-off relay 7. Diode 8. Clutch switch 9. Sidestand switch 10.Neutral switch 11.Start switch 12.Starter relay 13.Starter motor 14.Battery negative lead 15.Ground
ELECTRIC STARTING SYSTEM 8-9 EAS27190 TROUBLESHOOTING The starter motor fails to turn. NOTE: Before troubleshooting, remove the following part(s): 1Rider seat 2 Passenger seat 3 Fuel tank 4 Air filter case NG→ 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 8-85.Replace the fuse(s). 2 Check the battery. Refer to CHECKING AND CHARGING THE BATTERY on page 8-85. Clean the battery terminals. Recharge or replace the battery. 3 Check the starter motor operation. Refer to CHECKING THE STARTER MOTOR OPERATION on page 8-93.Repair or replace the starter motor. 4 Check the starter motor. Refer to CHECKING THE STARTER MOTOR on page 5-41.Repair or replace the starter motor. 5 Check the starting circuit cut-off relay. Refer to CHECKING THE RELAYS on page 8-88.Replace the starting circuit cut-off relay. 6 Check the starter relay. Refer to CHECKING THE RELAYS on page 8-88.Replace the starter relay. 7 Check the main switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the main switch/immobilizer unit assembly.
ELECTRIC STARTING SYSTEM 8-10 NG→ OK↓ NG→ OK↓ NG→ OK↓ NG→ OK↓ NG→ OK↓ NG→ OK↓ 8 Check the engine stop switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the right handlebar switch. 9 Check the neutral switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the neutral switch. 10 Check the sidestand switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the sidestand switch. 11 Check the clutch switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the clutch switch. 12 Check the start switch. Refer to CHECKING THE SWITCHES on page 8-81.Replace the right handlebar switch. 13 Check the entire starting system’s wiring. Refer to ELECTRIC STARTING SYSTEM on page 8-5.Properly connect or repair the starting system’s wiring The starting system circuit is OK.
CHARGING SYSTEM 8-11 EAS27200 CHARGING SYSTEM EAS27210 CIRCUIT DIAGRAM