FUEL INJECTION SYSTEM
8-36
b. Identify the faulty system with the fault code number.
c. Identify the probable cause of the malfunction.
▲▲▲▲ ▲ ▲▲▲▲▲▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲▲▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲ ▲▲▲▲
2. Check and repair the probable cause of the malfunction.
3. Perform the reinstatement action for the fuel injection system.
Refer to “Confirmation of service completion” in the appropriate table in “TROUBLESHOOTING DE-
TAILS” on page 8-39.
4. Set the main switch to “OFF”, then to “ON” again, and then check that no fault code number is dis-
played.
If another fault code number is displayed, repeat steps (1) to (4) until no fault code number is displayed.
5. Erase the malfunction history in the diagnostic mode. Refer to “Sensor operation table (Diagnostic
code No. 62)”.
Turning the main switch to “OFF” will not erase the malfunction history.
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 “TROU-
BLESHOOTING DETAILS” on page 8-39.
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.
Fault code No. No fault code No.
Check and repair. Refer to “TROUBLESHOOTING
DETAILS” on page 8-39.
Monitor the operation of the sensors and actuators in
the diagnostic mode. Refer to “TROUBLESHOOT-
ING DETAILS” on page 8-39 and “SELF-DIAGNOS-
TIC FUNCTION AND DIAGNOSTIC CODE TABLE”
on page 9-5.
Check and repair.
01: Throttle position sensor signal (throttle angle)
30: Cylinder-#1 ignition coil
31: Cylinder-#2 ignition coil
36: Fuel injector #1
37: Fuel injector #2
Yamaha diagnostic tool
90890-03231
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