Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

FUEL INJECTION SYSTEM8-104Fault code No. Er-3Symptom Correct data cannot be received from the ECU.Fail-safe action Engine startup: PossibleRiding: PossibleDiagnostic monitor-ing code No. —Meter display —Checking method —Item/components andprobable cause Check or maintenance job Sensor inspection proce-dure1 Connection of meter 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.Place the main switch to theON position, and check thefault code indication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.2 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.Place the main switch to theON position, and check thefault code indication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.3 Continuity of wire harness Open or short circuit → Con-nect it securely, or repair/replace the wire harness.Yellow/Blue–Yellow/BluePlace the main switch to theON position, and check thefault code indication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.4 Abnormal meter unit opera-tionReplace the meter unit. Place the main switch to theON position, and check thefault code indication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.5 ECU malfunction Replace the ECU.