Electrical equipment and instruments of motorcycle Yamaha YZF-R1 Y(C) (2009-2014)

Lighting system — circuit diagram
1. Main switch; 4. Main fuse; 7. Battery; 8. Fuel injection system fuse; 20. ECU (engine control unit); 46. Meter assembly; 57. High beam indicator light; 60. Meter light; 69. Left handlebar switch; 70. Dimmer switch; 75. Front left turn...

Lighting system — troubleshooting
Any of the following fail to light: headlight, high beam indicator light, taillight or license plate light. Before troubleshooting, remove the following part(s): 1. Rider seat 2. Left side cowling 3. Air intake air duct covers 4. Meter assembly 1....

Signaling system — circuit diagram
1. Main switch; 4. Main fuse; 7. Battery; 8. Fuel injection system fuse; 11. Relay unit; 16. Fuel sender; 20. ECU (engine control unit); 38. Speed sensor; 41. Coolant temperature sensor; 46. Meter assembly; 47. Fuel level warning light; 48. Oil...

Signaling system — troubleshooting
Any of the following fail to light: turn signal light, brake light or an indicator light. The horn fails to sound. Before troubleshooting, remove the following part(s): 1. Rider seat 2. Passenger seat 3. Fuel tank 4. Side cowlings 5. Meter assembly...

Cooling system — circuit diagram
1. Main switch; 4. Main fuse; 7. Battery; 8. Fuel injection system fuse; 20. ECU (engine control unit); 41. Coolant temperature sensor; 86. Radiator fan motor relay; 87. Right radiator fan motor fuse; 88. Left radiator fan motor fuse; 89. Right...

Cooling system — troubleshooting
Before troubleshooting, remove the following part(s): 1. Rider seat 2. Fuel tank 3. Side cowlings 1. Check the fuses. (Main, ignition, radiator fan motor and fuel injection system) Refer to "Checking the fuses". → Replace the fuse(s). 2. Check the...

Electrical components of motorcycle
1. Main switch; 2. Front brake light switch; 3. Clutch switch; 4. Ignition coil; 5. Battery; 6. Fuse box; 7. Main fuse; 8. Fuel injection system fuse; 9. Starter relay; 10. Rear brake light switch; 11. Gear position sensor; 12. Sidestand switch; 13....

Checking the switches
1. Horn switch; 2. Clutch switch; 3. Main switch; 4. Dimmer switch; 5. Turn signal switch; 6. Sidestand switch; 7. Gear position sensor; 8. Oil level switch; 9. Front brake light switch; 10. Engine stop switch; 11. Start switch; 12. Rear brake light...

Checking the bulbs and bulb sockets
Do not check any of the lights that use LEDs. Check each bulb and bulb socket for damage or wear, proper connections, and also for continuity between the terminals. Damage/wear → Repair or replace the bulb, bulb socket or both. Improperly connected...

Checking the fuses
The following procedure applies to all of the fuses. Notice: To avoid a short circuit, always set the main switch to "OFF" when checking or replacing a fuse. 1. Remove: Rider sear Refer to "General chassis". 2. Check: Fuse a. Connect the pocket...

Checking the relays
Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, replace the relay. Pocket tester 90890-03112. Analog pocket tester YU-03112-C. 1. Disconnect the relay from the wire harness. 2. Connect the pocket...

Checking the relay unit (diode)
1. Check: Relay unit (diode) Out of specification → Replace. Pocket tester 90890-03112. Analog pocket tester YU-03112-C. The pocket tester or the analog pocket tester readings are shown in the following table. Continuity: Positive tester probe: Sky...

Checking the ignition coils
The following procedure applies to all of the ignition coils. 1. Check: Primary coil resistance Out of specification → Replace. Primary coil resistance 0.85-1.15 a. Remove the ignition coil from the spark plug. b. Connect the pocket tester ( x 1) to...

Checking the crankshaft position sensor
1. Disconnect: Crankshaft position sensor coupler (from the wire harness) 2. Check: Crankshaft position sensor resistance. Out of specification → Replace the crankshaft position sensor. Crankshaft position sensor resistance 248-372 at 20°C (68°F)....

Checking the lean angle sensor
1. Remove: Lean angle sensor (from the battery box 2) 2. Check: Lean angle sensor out put voltage. Out of specification → Replace. Lean angle sensor output voltage: Less than 45°: 0.4-1.4 V More than 45°: 3.7-4.4 V a. Connect the test harness-lean...

Checking the horn
1. Check: Horn resistance Out of specification → Replace. Coil resistance 1.07-1.11 at 20°C (68°F). a. Disconnect the horn leads from the horn terminals. b. Connect the pocket tester ( x 1) to the horn terminals. Pocket tester 90890-03112. Analog...

Checking the oil level switch
1. Drain: Engine oil 2. Remove: Oil level switch (from the oil pan) 3. Check: Oil level switch resistance Oil level switch. Maximum level position resis-U tance 484-536 . Minimum level position resistance 114-126 a. Connect the pocket tester ( x...

Checking the fuel sender
1. Disconnect: Fuel pump coupler Fuel sender coupler (from the wire harness) 2. Remove: Fueltank 3. Remove: Fuel pump (from the fuel tank) 4. Check: Fuel sender resistance Fuel sender resistance 14-141 at 20°C (68°F). a. Connect the pocket tester (...

Checking the speed sensor
1. Check: Speed sensor output voltage. Out of specification → Replace. Output voltage reading cycle 0.6 V to 4.8 V to 0.6 V to 4.8 V. a. Connect the test harness-speed sensor (3P) "1" to the speed sensor coupler and wire harness as shown. b. Connect...

Checking the radiator fan motor
1. Check: Radiator fan motor Faulty/rough movement → Replace. a. Disconnect the radiator fan motor coupler from the wire harness. b. Connect the battery (DC 12 V) as shown. Positive tester probe: Blue or Green "1" Negative tester probe: Black "2" A....

Checking the coolant temperature sensor
1. Remove: Coolant temperature sensor Refer to "Cylinder head". Warning: Handle the coolant temperature sensor with special care. Never subject the coolant temperature sensor to strong shocks. If the coolant temperature sensor is dropped, replace...

Checking the throttle position sensor
1. Remove: Throttle position sensor (from the throttle body) 2. Check: Throttle position sensor maximum resistance Out of specification → Replace the throttle position sensor. Throttle position sensor resistance k a. Connect the pocket tester ( x 1...

Checking the accelerator position sensor
1. Remove: Accelerator position sensor (from the throttle body) 2. Check: Accelerator position sensor maximum resistance Out of specification → Replace the accelerator position sensor. Accelerator position sensor resistance 1.2-2.8 k a. Connect the...

Checking the throttle servo motor
1. Remove: Air filter case Refer to "Air filter case". 2. Check: Throttle servo motor resistance Out of specification → Replace the throttle body assembly. Throttle servo motor resistance 1.23-1.67 a. Disconnect the throttle servo motor coupler from...

Checking the air induction system solenoid
1. Check: Air induction system solenoid resistance. Out of specification → Replace. Solenoid resistance 18-22 at 20°C (68°F). a. Disconnect the air induction system solenoid coupler from the air induction system solenoid. b. Connect the pocket...

Checking the atmospheric pressure sensor
1. Check: Atmospheric pressure sensor output voltage Out of specification → Replace. Atmospheric pressure sensor output voltage 3.57-3.71 V at 101.32 kPa. a. Connect the test harness S-pressure sensor 5S7 (3P) "1" to the atmospheric pressure sensor...

Checking the cylinder identification sensor
1.Remove: Fuel tank Refer to "Fuel tank". Air filter case Refer to "Air filter case". Air filter case duct Refer to "Air induction system". 2. Check: Cylinder identification sensor output voltage Out of specification → Replace. Cylinder...

Checking the intake air pressure sensor
1. Check: Intake air pressure sensor output voltage. Out of specification → Replace. Intake air pressure sensor output voltage 3.57-3.71 V at 101.32 kPa a. Connect the test harness S-pressure sensor 5S7 (3P) "1" to the intake air pressure sensor and...

Checking the intake air temperature sensor
1. Remove: Intake air temperature sensor (from the headlight assembly.) Warning: Handle the intake air temperature sensor with special care. Never subject the intake air temperature sensor to strong shocks. If the intake air temperature sensor is...

Checking the steering damper solenoid
1. Remove: Left side cowling Refer to "General chassis". 2. Check: Steering damper solenoid resistance. Out of specification → Replace the steering damper assembly. Steering damper solenoid resistance 49.82-56.18 at 20°C (68°F). a. Disconnect the...

Checking the gear position sensor
1. Remove: Fuel tank Refer to "Fuel tank". Gear position sensor Refer to "Crankcase". 2. Check: Gear position sensor Out of specification → Replace the gear position sensor. Pocket tester 90890-03112. Analog pocket tester YU-03112-C. Result. Neutral...

Checking the fuel injectors
1. Remove: Fuel tank Refer to "Fuel tank". Air filter upper cover (for secondary injector) Refer to "Air filter case". 2. Check: Fuel injector resistance Out of specification → Replace the fuel injector. Fuel injector resistance (Primary...

Wiring diagram of motorcycle
1. Main switch 2. AC magneto 3. Rectifier/regulator 4. Main fuse 5. Backup fuse 6. ETV (Electronic Throttle Valve) fuse 7. Battery 8. Fuel injection system fuse 9. Starter relay 10. Starter motor 11. Relay unit 12. Starting circuit cut-off relay 13....