Yamaha YZF-R125 Service Manual: Troubleshooting details

This section describes the measures per fault code number displayed on the FI diagnostic tool. Check and service the items or components that are the probable cause of the malfunction following the order given.

After the check and service of the malfunctioning part have been completed, reset the FI diagnostic tool display according to the reinstatement method.

Fault code No.: Fault code number displayed on the FI diagnostic tool when the engine failed to work normally. Refer to "Diagnostic code table".

Diagnostic code No.: Diagnostic code number to be used when the diagnostic mode is operated. Refer to "Sensor operation table" and "Actuator operation table".

Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


    Setting the diagnostic mode
    1. Set the main switch to "OFF" and the engine stop switch to " ". 2. Disconnect the self-diagnosis signal connector "1", and then connect the FI diagnostic tool "2" as shown. 3. Disconnect ...

    Fuel pump system
    ...

    Other materials:

    Important manual information
    Particularly important information is distinguished in this manual by the following notations: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. WARNING ...

    Removing the lower bracket
    1. Stand the vehicle on a level surface. WARNINGSecurely support the vehicle so that there is no danger of it falling over. 2. Remove: Upper ring nut Rubber washer Lower ring nut "1" Lower bracket NOTE: Remove the lower ring nut with the steering nut wrench "2". ...

    Electrical components
    1. Main switch 2. Clutch switch 3. Front brake light switch 4. Ignition coil 5. Throttle body sensor assembly (intake air pressure sensor, intake air temperature sensor, throttle position sensor) 6. FID (fast idle solenoid) 7. Rectifier/regulator 8. Lean angle sensor 9. Starting circui ...

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