Yamaha YZF-R1B 2012 Service Manual

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Contents

FUEL INJECTION SYSTEM8-84Fault code No. 42SymptomA. Normal signals are not received from the rear speed sen-sor.B. Open or short circuit of gear position sensor leadC. Normal signals are not received from the clutch switch.AFail-safe action Engine startup: PossibleRiding: PossibleDiagnostic monitoringcode No. D:07 (Rear speed sensor)Meter display Vehicle speed pulses: 0–999Checking methodMake sure that the indication value increases when the rota-tion speed of the rear wheel increases. This value is cumula-tive and is not reset each time the wheel is prevented fromrotating.BFail-safe action Engine startup: PossibleRiding: PossibleDiagnostic monitoringcode No. D:21 (Gear position sensor)Meter displayGear position switch• ON (neutral)• OFF (in gear)Checking method Shift the transmission and clutch lever.CFail-safe action Engine startup: PossibleRiding: PossibleDiagnostic monitoringcode No. D:21 (Clutch switch)Meter displayON (Gear is in other than neutral, operating clutch and stor-ing sidestand.)OFF (Gear is in other than neutral, operating clutch andusing sidestand.)Checking method Shift the transmission, clutch lever and sidestand.Checkpoints Inspection methodLocate the malfunction. Check in the diagnostic mode (Code No. 07).Rotate the rear wheel and make sure that theindication value increases. Malfunction → Goto the “Rear speed sensor system malfunc-tion” section below.Check in the diagnostic mode (Code No. 21).When the gear is in neutral position: ON indi-cationWhen the gear is not in neutral position: OFFindicationMalfunction → Go to the “Gear position sen-sor system malfunction” section below.Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk