Yamaha FZ1-N Service Manual

Contents

FUEL INJECTION SYSTEM8-74Fault code No. Er-3 Symptom Data from the ECU cannot be received correctly.Diagnostic code No. — —Order Item/components and probablecause Check or maintenance job Reinstatementmethod1Connections• Main wire harness ECU coupler• Main wire harness meter assemblycoupler• Sub-wire harness coupler• Check the couplers for any pinsthat may be pulled out.• Check the locking condition ofthe couplers.• If there is a malfunction, repair itand connect the couplersecurely.Turning themain switch to“ON”.2Open or short circuit in wire harness. • Repair or replace if there is anopen 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 probablecause Check or maintenance job Reinstatementmethod1Connections• Main wire harness ECU coupler• Main wire harness meter assemblycoupler• Sub-wire harness coupler• Check the couplers for any pinsthat may be pulled out.• Check the locking condition ofthe couplers.• If there is a malfunction, repair itand connect the couplersecurely.Turning themain switch to“ON”.2Open or short circuit in wire harness. • Repair or replace if there is anopen 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.