Yamaha YZF-R1B 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

FUEL INJECTION SYSTEM8-764 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 the engine and let it idlefor approximately 5 seconds,and check the fault code indi-cation.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.5 Connection of primary injec-tor sub-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 the engine and let it idlefor approximately 5 seconds,and check the fault code indi-cation.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.Fault code No. 39Symptom Open or short circuit of primary 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:36D:37D:38D:39D:36Actuator oper-ationActuates the primary injector #1 five times at one-second intervals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the primary injector #1 five times.D:37Actuator oper-ationActuates the primary injector #2 five times at one-second intervals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the primary injector #2 five times.D:38Actuator oper-ationActuates the primary injector #3 five times at one-second intervals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the primary injector #3 five times.D:39Actuator oper-ationActuates the primary injector #4 five times at one-second intervals.Illuminates the engine trouble warning light.Checkingmethod Check the operating sound of the primary injector #4 five times.Item/components andprobable cause Check or maintenance job Sensor inspection proce-dureManuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk