Yamaha Fz1n Service Manual
Have a look at the manual Yamaha Fz1n Service Manual online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 255 Yamaha manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.
FUEL INJECTION SYSTEM 8-67 B-1Installed state of neutral switch. Check for looseness or pinch- ing.Starting the engine, and activating the speed sensor by operating the vehicle at 20 to 30 km/h. B-2 Connections Neutral switch coupler Main wire harness ECU coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect the coupler securely. B-3 Open circuit in neutral switch lead. Repair or replace if there is an open or short circuit. Between neutral switch coupler and relay unit coupler (Sky blue–Sky blue) Between relay unit coupler and ECU coupler. (Blue/Yellow–Blue/Yellow) B-4 Defective neutral switch. Execute the diagnostic mode. (Code No.21) Replace if defective. Refer to CHECKING THE SWITCHES on page 8-93. B-5 Faulty shift drum (neutral detection area). Replace if defective. Refer to TRANSMISSION on page 5-85. Fault code No. 42 Symptom A. No normal signals are received from the speed sen- sor. B. Open circuit is detected in the neutral switch. Diagnostic code No. A 07 Speed sensor B 21 Neutral switch Order Item/components and probable cause Check or maintenance job Reinstatement method
FUEL INJECTION SYSTEM 8-68 Fault code No. 43 SymptomPower supply to the injectors and fuel pump is not nor- mal. Diagnostic code No. 09 Fuel system voltage (battery voltage) Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections Relay unit coupler (fuel pump relay) Main wire harness ECU coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect it securely. Starting the engine and operating it at idle. 2 Open or short circuit in wire harnes s. Repair or replace if there is an open or short circuit. Between relay unit coupler and ECU coupler. (Blue/Yellow–Blue/Yellow) (Red/Blue–Red/Blue) Between relay unit coupler and battery terminal. (Red–Red) Between relay unit coupler and engine stop switch coupler. (Red/Black–Red/Black) 3 Malfunction or open circuit in fuel pump relay Execute the diagnostic mode. (Code No. 09) Replace if defective. If there is no malfunction with the fuel pump relay, replace the ECU.
FUEL INJECTION SYSTEM 8-69 Fault code No. 44 SymptomAn error is detected while reading or writing on EEPROM (CO adjustment value). Diagnostic code No. 60 EEPROM fault cylinder No. Orde r Item/components and probable cause Check or maintenance job Reinstatement method 1 Malfunction in ECU Set the faulty cylinder’s exhaust gas volume. 1 Execute the diagnostic mode (Code No. 60) to check the faulty cylinder number. (If mul- tiple cylinders are defective, the numbers of the faulty cyl- inders are displayed alter- nately at 2-second intervals.) 2 Execute the CO adjustment mode and set the exhaust gas volume of the faulty cylinder to “0”. If “0” is displayed, set the numerical value other than “0”. When the malfunction is recovered, reset “0”. Refer to ADJUSTING THE EXHAUST GAS VOLUME on page 3-8. Replace ECU if it does not recover from the malfunction. Turning the main switch to “ON”. (Readjust the exhaust gas vol- ume after it is reinstated.)
FUEL INJECTION SYSTEM 8-70 Fault code No. 46 SymptomPower supply to the fuel injection system relay is not nor- mal. Diagnostic code No. — — Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections. Main wire harness ECU coupler Check the coupler for any pins that may be pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect the coupler securely. Starting the engine and operating it at idle. 2 Faulty battery Replace or change the battery Refer to CHECKING AND CHARGING THE BATTERY on page 8-97. 3 Malfunction in rectifier/regulator Replace if defective. Refer to CHARGING SYS- TEM on page 8-11. 4 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between battery and main switch (Red–Red) Between main switch and igni- tion fuse (Brown/Blue–Brown/Blue) Between ignition fuse and ECU (Red/White–Red/White)
FUEL INJECTION SYSTEM 8-71 Fault code No. 47 SymptomSub-throttle position sensor:open or short circuit detected. Diagnostic monitor- ing code No. 56 Sub-throttle servo motor Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Installed state of sub-throttle position sensor. Check for looseness or pinch- ing. Check that the sensor is installed in the specified posi- tion. Turning the main switch to “ON”. 2 Connections Sub-throttle position sensor coupler Main wire harness ECU coupler Sub-wire harness coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect the coupler securely. 3 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between sub-throttle position sensor coupler and ECU cou- pler. (Black/Blue–Black/Blue) (Green/Yellow–Green/Yellow) (Blue–Blue) 4 Defective sub-throttle position sensor. Execute the diagnostic mode. (Code No. 56) Replace if defective. Refer to CHECKING THE SUB-THROTTLE POSITION SENSOR on page 8-110.
FUEL INJECTION SYSTEM 8-72 Fault code No. 48 Symptom Sub-throttle servo motor:stuck. Diagnostic code No. 56 Sub-throttle servo motor Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections Sub-throttle servo motor coupler Main wire harness ECU coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect the coupler securely. Turning the main switch to “ON”. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between sub-throttle servo motor coupler and ECU coupler (Yellow/Red–Yellow/Red) (Yellow/White–Yellow/White) 3 Defective sub-throttle servo motor Execute the diagnostic mode. (Code No. 56) Replace if defective. Refer to CHECKING THE SUB-THROTTLE SERVO MOTOR on page 7-10. Fault code No. 50 Symptom Faulty ECU memory. (When this malfunction is detected in the ECU, the fault code number might not appear on the meter.) Diagnostic code No. — — Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Malfunction in ECU. Replace the ECU. NOTE: Do not perform this procedure with the main switch turned to “ON”. Turning the main switch to “ON”
FUEL INJECTION SYSTEM 8-73 Fault code No. Er-1 Symptom No signals are received from the ECU. Diagnostic code No. — — Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections Main wire harness ECU coupler Main wire harness meter assembly coupler Sub-wire harness coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect the coupler securely. Turning the main switch to “ON”. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between meter assembly cou- pler and ECU coupler. (Yellow/Blue–Yellow/Blue) 3 Malfunction in meter assembly . Replace the meter assembly. 4 Malfunction in ECU. Replace the ECU. Fault code No. Er-2 Symptom No signals are received from the ECU within the specified duration. Diagnostic code No. — — Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections Main wire harness ECU coupler Main wire harness meter assembly coupler Sub-wire harness coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect the coupler securely. Turning the main switch to “ON”. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between meter assembly cou- pler and ECU coupler. (Yellow/Blue–Yellow/Blue) 3 Malfunction in meter assembly . Replace the meter assembly. 4 Malfunction in ECU. Replace the ECU.
FUEL INJECTION SYSTEM 8-74 Fault code No. Er-3 Symptom Data from the ECU cannot be received correctly. Diagnostic code No. — — Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections Main wire harness ECU coupler Main wire harness meter assembly coupler Sub-wire harness coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect the coupler securely. Turning the main switch to “ON”. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between meter assembly cou- pler and ECU coupler. (Yellow/Blue–Yellow/Blue) 3 Malfunction in meter assembly. Replace the meter assembly. 4 Malfunction in ECU. Replace the ECU. Fault code No. Er-4 Symptom Non-registered data has been received from the meter. Diagnostic code No. — — Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections Main wire harness ECU coupler Main wire harness meter assembly coupler Sub-wire harness coupler Check the couplers for any pins that may be pulled out. Check the locking condition of the couplers. If there is a malfunction, repair it and connect the coupler securely. Turning the main switch to “ON”. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between meter assembly cou- pler and ECU coupler. (Yellow/Blue–Yellow/Blue) 3 Malfunction in meter assembly. Replace the meter assembly. 4 Malfunction in ECU. Replace the ECU.
FUEL PUMP SYSTEM 8-75 EAS27550 FUEL PUMP SYSTEM EAS27560 CIRCUIT DIAGRAM
FUEL PUMP SYSTEM 8-76 1. Main switch 6. Fuse (main) 7. Battery 8. Fuse (fuel injection) 13.Fuel pump relay 16.Fuel pump 23.ECU 46.Multi function meter 56.Engine stop switch 78.Fuse (ignition)