Yamaha SR400 2014 Service Manual

FUEL INJECTION SYSTEM7-31FI diagnostic tool displayThrottle angle• 14–20 (fully closed position)• 79–85 (fully open position)Procedure • Check with throttle fully closed.• Check with throttle fully open.Probable cause of malfunction Check or maintenance job1 Installed condition of throttle positionsensor.• Check for looseness or pinching.• Check that the sensor is installed in the spec-ified position.2 Defective throttle position sensor. • Execute diagnostic code No. D01.• Replace if defective.Refer to “CHECKING THE THROTTLEPOSITION SENSOR” on page 7-70.Reinstatement method Start the engine, let it run at idle, and then race it.Fault code No. 19Item Sidestand switch: a break or disconnection of blue/black leadof the ECU is detected.Fail-safe system Unable to start engineUnable to drive vehicleDiagnostic code No. D20FI diagnostic tool displaySidestand switch• on (sidestand retracted)• off (sidestand extended)Procedure Extend and retract the sidestand (with the transmission in gear).Probable cause of malfunction Check or maintenance job1 Connections• Wire harness ECU coupler• Check the coupler for any pins that may bepulled out.• Check the locking condition of the coupler.• If there is a malfunction, repair it and connectthe coupler securely.2 Open or short circuit in wire harness. • Repair or replace if there is an open or shortcircuit.• Between the ECU and blue/black lead3 Defective sidestand switch. • Execute diagnostic code No. D20.• Replace if defective.Refer to “CHECKING THE SWITCHES” onpage 7-55.Reinstatement method If the transmission in gear, retract the sidestand.If the transmission is in neutral, connect the wiring.Fault code No. 16Item Throttle position sensor: stuck throttle position sensordetected.