Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

FUEL INJECTION SYSTEM8-78Fault code No. 40Symptom Open or short circuit of secondary injector leadFail-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:40D:41D:42D:43D:40Actuator oper-ationActuates the secondary injector #1 five times at one-second inter-vals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the secondary injector #1 five times.D:41Actuator oper-ationActuates the secondary injector #2 five times at one-second inter-vals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the secondary injector #2 five times.D:42Actuator oper-ationActuates the secondary injector #3 five times at one-second inter-vals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the secondary injector #3 five times.D:43Actuator oper-ationActuates the secondary injector #4 five times at one-second inter-vals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the secondary injector #4 five times.Item/components andprobable cause Check or maintenance job Sensor inspection proce-dure1 Locate the malfunction Check in the diagnostic mode(Code No. 40, 41, 42, 43).Refer to “CHECKING THEFUEL INJECTORS” on page8-148.—2 Connection of secondaryinjector 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.Check the injector’s operatingnoise by the diagnostic mode(Code No.40–43).Injector’s operating noise →Reset with the diagnosticcode 63. Recovered.No injector’s operating noise→ Check the next step.