Yamaha YZF-R125 Service Manual: 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 the fuel pump coupler.

4. While pressing the "MODE" button, set the main switch to "ON".

NOTE:

  • "DIAG" appears on the LCD of the FI diagnostic tool.
  • "POWER" LED (Green) comes on.

5. Press the "UP" button to select the CO adjustment mode "CO" or the diagnostic mode "DIAG".

6. After selecting "DIAG", press the "MODE" button.

7. Select the diagnostic code number corresponding to the fault code number by pressing the "UP" and "DOWN" buttons.

Setting the diagnostic mode


NOTE:

  • The diagnostic code number appears on the LCD (01-70).
  • To decrease the selected diagnostic code number, press the "DOWN" button. Press the "DOWN" button for 1 second or longer to automatically decrease the diagnostic code numbers.
  • To increase the selected diagnostic code number, press the "UP" button. Press the "UP" button for 1 second or longer to automatically increase the diagnostic code numbers.

8. Verify the operation of the sensor or actuator.

  • Sensor operation The data representing the operating conditions of the sensor appear on the LCD.
  • Actuator operation Press the "MODE" button.

9. Set the main switch to "OFF" to cancel the diagnostic mode.

10.Disconnect the FI diagnostic tool and connect the self-diagnosis signal connector.

Diagnostic code table

Diagnostic code table


Diagnostic code table


Sensor operation table

Sensor operation table


Sensor operation table


Actuator operation table

Actuator operation table


Communication error with the FI diagnostic tool

Communication error with the FI diagnostic tool


    Setting the normal mode
    NOTE: The engine speed, coolant temperature, and fault code, if detected, can be displayed on the LCD of the FI diagnostic tool when the tool is connected to the vehicle and is set to the normal ...

    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 t ...

    Other materials:

    Removing the piston
    1. Remove: Piston pin clips "1" Piston pin "2" Piston "3" CAUTION:Do not use a hammer to drive the piston pin out. NOTE: Before removing the piston pin clip, cover the crankcase opening with a clean rag to prevent the piston pin clip from falling in ...

    Checking the spark plug
    1. Remove: Right side cover Refer to "GENERAL CHASSIS" on page 4-1. 2. Disconnect: Spark plug cap 3. Remove: Spark plug CAUTION:Before removing the spark plug, blow away any dirt accumulated in the spark plug well with compressed air to prevent it from falling ...

    Installing the front brake caliper
    1. Install: Brake caliper "1" (temporarily) Copper washers "2" Brake hose "3" Brake hose union bolt "4" WARNINGProper brake hose routing is essential to insure safe vehicle operation. Refer to "CABLE ROUTING" on page 2-33. CAUTION: Install the brake ...

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