Yamaha YZF-R1(B) 2012 Service Manual

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Contents

FUEL INJECTION SYSTEM8-64Fault code No. 24Symptom The O 2 sensor does not operate.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 O 2 sensor installation status Check the sensor for a loosemounting or a pinchEither start and warm up theengine, and then racing it, orreset it with diagnostic code63.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.2 Connection of O 2 sensorcouplerCheck 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.Either start and warm up theengine, and then racing it, orreset it with diagnostic code63.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.3 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.Either start and warm up theengine, and then racing it, orreset it with diagnostic code63.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.4 Continuity of wire harness Open or short circuit → Con-nect it securely, or repair/replace the wire harness.Black/Blue–Black/BluePink/Black–Pink/BlackRed/Blue–Red/BlueGray/Green–Gray/GreenEither start and warm up theengine, and then racing it, orreset it with diagnostic code63.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.5 Check the fuel line pressure. Refer to “CHECKING THEFUEL LINE PRESSURE” onpage 7-18.Either start and warm up theengine, and then racing it, orreset it with diagnostic code63.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.