Operation Manual

FUEL INJECTION SYSTEM
8-35
EAS59C1803
YAMAHA DIAGNOSTIC TOOL
This model uses the Yamaha diagnostic tool to identify malfunctions.
For information about using the Yamaha diagnostic tool, refer to the operation manual that is
included with the tool.
Features of the Yamaha diagnostic tool
You can use the Yamaha diagnostic tool to identify malfunctions quicker than with conventional
methods.
By connecting the adapter interface, which is connected to the USB port of a computer, to a vehi-
cle’s ECU using the communication cable, you can display information that is necessary for identify-
ing malfunctions and for maintenance to display on the computer. The displayed information
includes the sensor output data and information recorded in the ECU.
Functions of the Yamaha diagnostic tool
However, the diagnostic tool cannot be used to freely change the basic vehicle functions, such as
adjusting the ignition timing.
Yamaha diagnostic tool
90890-03215
Fault diagnosis mode: Error codes recorded on the ECU are read, and the con-
tents are displayed.
Function diagnostic mode: Check the operation of the output value of each sensor
and actuator.
Inspection mode: Determine whether each sensor or actuator is functioning
properly.
CO adjustment mode: Adjust the concentration of CO admissions during idling.
Monitoring mode: Displays a graph of sensor output values for actual operat-
ing conditions.
Logging mode: Records and saves the sensor output value in actual driv-
ing conditions.
View log: Displays the logging data.
ECU rewrite: If necessary, the ECU is rewritten using ECU rewrite data
provided by Yamaha.
Ignition timing adjustment, etc. cannot be changed from
the vehicle's original state.