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.
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
Sensor operation table
Actuator operation table
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:
Checking the decompression system
1. Check:
Decompression system
a. Check the decompression system with the
camshaft sprocket and the decompression
cam installed to the camshaft.
b. Check that the decompression lever "1"
moves smoothly.
c. Without operating the decompression lever,
check that the decompression cam " ...
Assembling the front brake caliper
WARNING
Before installation, all internal brake components
should be cleaned and lubricated
with clean or new brake fluid.
Never use solvents on internal brake components
as they will cause the brake caliper
dust seals and piston seals to swell and
distort.
...
Adjusting the engine idling speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.
Remove panel A.
Check the engine idling speed
and, if necessary, ...