Yamaha YZF-R1B 2012 Service Manual

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Contents

FUEL INJECTION SYSTEM8-93Fault code No. 50Symptom ECU memory malfunctionFail-safe action Engine startup: Under certain conditionsRiding: Under certain conditionsDiagnostic monitor-ing code No. —Meter display —Checking method —Item/components andprobable cause Check or maintenance job Sensor inspection proce-dure1 ECU malfunction Replace the ECU. Place the main switch to theON position.Then, check that no faultcode indicated.Fault code No. 59Symptom Open or short circuit of accelerator position sensor leadFail-safe action Engine startup: Possible under certain conditionsRiding: Possible under certain conditionsDiagnostic monitor-ing code No.D:14D:15D:14Meter displayAccelerator position sensor signal 1• 12–22 (fully closed position)• 97–107 (fully opened position)Checkingmethod• Check with throttle grip fully closed.• Check with throttle grip fully open.D:15Meter displayAccelerator position sensor signal 2• 10–24 (fully closed position)• 95–109 (fully opened position)Checkingmethod• Check with throttle grip fully closed.• Check with throttle grip fully open.Item/components andprobable cause Check or maintenance job Sensor inspection proce-dure1 Connection of acceleratorposition sensor 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.Place the main switch to theON position, and check thefault code indication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.2 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.Place the main switch to theON position, and check thefault code indication.No fault code indicated. →Recovered.Fault code indicated. →Check the next step.Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk