Yamaha YZF-R1 2007 Service Manual

FUEL INJECTION SYSTEM8-49Fault code No. 17 Symptom EXUP servo motor circuit: open or short circuit detected.Diagnostic code No. 53 EXUP servo motorOrderItem/components and probablecause Check or maintenance job Reinstatementmethod1 Connections• EXUP servo motor coupler• Main wire harness ECU coupler• Check the coupler for any pinsthat may have pulled out.• Check the locking condition ofthe coupler.• If there is a malfunction, repair itand connect the couplersecurely.Reinstatedautomatically ifa normal signalis received.2 Open or short circuit in wire harness. • Repair or replace if there is anopen or short circuit.• Between EXUP servo motorcoupler and ECU coupler.(Blue–Blue)(White/Red–White/Red)(Black/Blue–Black/Blue)3 Defective EXUP servo motor (potenti-ometer circuit).• Execute the diagnostic mode.(Code No.53)• Replace if defective.Fault code No. 18 Symptom EXUP servo motor is stuck.Diagnostic code No. 53 EXUP servo motorOrderItem/components and probablecause Check or maintenance job Reinstatementmethod1 Connections• EXUP servo motor coupler• Main wire harness ECU coupler• Check the coupler 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”.It takes 3 sec-onds at themaximumbefore the origi-nal statereturns.2 Open or short circuit in wire harness. • Repair or replace if there is anopen or short circuit.• Between EXUP servo motorcoupler and ECU coupler.(Black/Green–Black/Green)(Black/Red–Black/Red)3 Defective EXUP servo motor • Execute the diagnostic mode.(Code No.53)• Replace if defective.4 Defective EXUP valve, pulley, andcablesReplace if defective.Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk