Yamaha FZ1-N Service Manual page 366

If a malfunction is detected in the sensors
or actuators, repair or replace all faulty
parts.
EAS27420
DIAGNOSTIC MODE
Setting the diagnostic mode
1. Turn the main switch to "OFF" and set the engine stop switch to "
2. Disconnect the wire harness coupler from the fuel pump.
3. Press and hold the "SELECT" and "RESET" buttons, turn the main switch to "ON", and continue
to press the buttons for 8 seconds or more.
NOTE:
• All displays on the meter disappear except the odometer/tripmeter/fuel reserve tripmeter display.
• "dI" appears on the odometer/tripmeter/fuel reserve tripmeter LCD.
4. Press the "SELECT" button to select the diagnostic mode "dI".
5. After selecting "dI", simultaneously press the "SELECT" and "RESET" buttons for 2 seconds or
more to activate the diagnostic mode. The diagnostic code number "d01" appears on the clock
LCD.
6. Set the engine stop switch to " ".
7. Select the diagnostic code number corresponding to the fault code number by pressing the
"SELECT" and "RESET" buttons.
NOTE:
• The diagnostic code number appears on the LCD meter (d01–70).
• To decrease the selected diagnostic code number, press the "RESET" button. Press the "RESET"
button for 1 second or longer to automatically decrease the diagnostic code numbers.
• To increase the selected diagnostic code number, press the "SELECT" button. Press the
"SELECT" button for 1 second or longer to automatically increase the diagnostic code numbers.
8. Verify the operation of the sensor or actuator.
• Sensor operation
FUEL INJECTION SYSTEM
If no malfunction is detected in the sensors
and actuators, check and repair inner parts
of the engine.
8-42
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