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EAS1XC1028
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.
Yamaha diagnostic tool (US)
90890-03234
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 vehicle's
ECU using the communication cable, you can display information that is necessary for identifying mal-
functions and for maintenance to display on the computer. The displayed information includes the sen-
sor output data and information recorded in the ECU.
Functions of the Yamaha diagnostic tool
Fault diagnosis mode:
Function diagnostic mode:
Inspection mode:
CO adjustment mode:
Monitoring mode:
Logging mode:
View log:
ECU rewrite:
However, the Diagnostic Tool cannot be used to freely change the basic vehicle functions, such as
adjusting the ignition timing.
Connecting the Yamaha diagnostic tool
Remove the protective cap "1", and then connect the Yamaha diagnostic tool to the coupler.
Fault codes recorded on the ECU are read, and the contents are
displayed.
Check the operation of the output value of each sensor and actu-
ator.
Determine whether each sensor or actuator is functioning prop-
erly.
Adjust the concentration of CO admissions during idling.
Displays a graph of sensor output values for actual operating
conditions.
Records and saves the sensor output value in actual driving con-
ditions.
Displays the logging data.
If necessary, the ECU is rewritten using ECU rewrite data provid-
ed by Yamaha.
Ignition timing adjustment, etc. cannot be changed from the vehi-
cle's original state.
8-34
FUEL INJECTION SYSTEM
1
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Troubleshooting
