Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

FUEL INJECTION SYSTEM8-692 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 5 seconds.Then, check the fault codeindication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.3 Connection of ignition systemsub-wire harness 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 5 seconds.Then, check the fault codeindication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.4 Continuity of wire harness Open or short circuit →Replace the wire harness.Gray/Red–Gray/RedStart and idle the engine forapproximately 5 seconds.Then, check the fault codeindication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.5 Ignition coil installation status Check the connection of thecoupler is secure.Make sure that the mountingposition is correct.Start and idle the engine forapproximately 5 seconds.Then, check the fault codeindication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.Fault code No. 34Symptom Ignition coil #2 primary lead malfunctionFail-safe actionEngine startup: Possible (depending on the number of failed cylin-ders)Riding: Possible (depending on the number of failed cylinders)Diagnostic monitor-ing code No. D:31Meter displayActuates the cylinder-#2 ignition coil five times at one-second inter-vals.Illuminates the engine trouble warning light.Checking method Check the spark five times.• Connect an ignition checker.Item/components andprobable cause Check or maintenance job Sensor inspection proce-dure