Yamaha YZF-R1B 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

FUEL INJECTION SYSTEM8-892 Connection of main harnessECU couplerCheck the connection of thecoupler is secure.Remove the coupler, andcheck each pin (for bending,wear, or locking).Poor connection → Connectit securely, or repair/replacethe wire harness.Start and idle the engine forapproximately 30 seconds.Then, check the fault codeindication.No fault indicated. → Recov-ered.Fault code indicated. →Check the next step.3 Continuity of wire harnessbetween the battery, relayunit, ECU and fuel injectorscouplerOpen or short circuit →Replace the wire harness.Red–RedRed/Blue–Red/BlueStart and idle the engine forapproximately 30 seconds.Then, check the fault codeindication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.4 Fuel injection system relaymalfunctionCheck in the diagnostic mode(Code No. 50).No operation sound of fuelinjection system relay isheard. → Replace the relayunit.Start and idle the engine forapproximately 30 seconds.Then, check the fault codeindication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.5 ECU malfunction Replace the ECU.Fault code No. 43Symptom Incorrect voltage supplied to the fuel injector and fuel pumpFail-safe action Engine startup: PossibleRiding: PossibleDiagnostic monitor-ing code No. D:50Meter display Approximately 12.0Checking methodSet the engine stop switch to “ ”, and then compare with the actu-ally measured battery voltage. (If the battery voltage is lower, per-form recharging.)Item/components andprobable cause Check or maintenance job Sensor inspection proce-dureManuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk