Yamaha R15 2022, Service Manual

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8-32
FUEL INJECTION SYSTEM
– + ELEC
The engine operation is not normal, but the engine trouble warning light does not come on.
1. Check the operation of the following sensors and actuators in the diagnostic mode. Refer to “DIAG-
NOSTIC CODE: SENSOR OPERATION TABLE” on page 8-44 and “DIAGNOSTIC CODE: ACTU-
ATOR OPERATION TABLE” on page 8-46.
If a malfunction is detected in the sensors or actuators, repair or replace all faulty parts.
If no malfunction is detected in the sensors and actuators, check and repair the inner parts of the
engine.
EAS30951
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 meth-
ods.
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.
01: Throttle position sensor signal (throttle angle)
30: Ignition coil
36: Fuel injector
Yamaha diagnostic tool
INS-018
(90890-03267)
INS-019
(90890-03264)
BCWF8197E0.book Page 32 Thursday, November 18, 2021 9:18 AM