Yamaha YZF-R1(B) 2012 Service Manual

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Contents

FUEL INJECTION SYSTEM8-726 Ignition coil malfunction(Check the resistance of igni-tion coil #3.)Refer to “CHECKING THEIGNITION COILS” on page 8-136.Ignition coil inspectionmethodStart and idle the engine forapproximately 5 seconds.Then, check the fault codeindication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.7 ECU malfunction Check in the diagnostic mode(Code No. 32).If not ignited, replace thedefective ECU.Fault code No. 36Symptom Ignition coil #4 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:33Meter displayActuates the cylinder-#4 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-dure1 Connection of ignition coilcouplerCheck 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.Fault code No. 35Symptom Ignition coil #3 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:32Meter displayActuates the cylinder-#3 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