Yamaha YZF-R1P 2001-2003, Service Manual

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7 - 6
FI
FUEL INJECTION SYSTEM
DIAGNOSTIC MODE
• In this mode, diagnostic codes are input into the ECU in accordance with the number of times the
start switch has been operated.
• In accordance with the diagnostic codes, the ECU displays the values received from the sensors
and actuates the actuators.
• Whether or not the system is operating normally is determined by a human operator through the
observations of the values indicated by the engine trouble warning light or the actuating condi-
tions of the actuators.
How to set the diagnostic mode
1. Turn the main switch to “OFF” and engine
stop switch “ON”.
2. While keeping the “SELECT” and “RESET”
buttons pressed simultaneously, turn “ON”
the main switch (keep them pressed for 8
seconds or more).
NOTE:
• All indications on the meter disappear except
the clock and trip indications.
• Letters “dlAG” appear on the clock LCD.
3. Using the “SELECT” button, select either
the CO adjustment mode (which appears as
“CO”) or the diagnosis mode (which
appears as “dlAG”).
4. After “dlAG” appears as a result of pressing
the “SELECT” button, simultaneously press
the “SELECT” and “RESET” buttons for 2
seconds or more to execute the selection.
5. Disconnect the wiring harness coupler from
the fuel pump.
6. Turn the engine stop switch “OFF”.
Turn the engine stop switch “ON” if diagnos-
tic code numbers 03 and 09 are shown.
7. Select the diagnostic code number that
applies to the item that was verified with the
self-diagnostic fault code number, and enter
it on the meter by operating the “SELECT”
or “RESET” button.
NOTE:
• “RESET” button
Decrement (press 1 second or longer
→
auto) “SELECT” button
Increment (press 1 second or longer
→
auto)
• Diagnostic code number appears on clock
LCD (01 ~ 70)
8. Turn the main switch to “OFF”. The diagno-
sis mode will be cancelled.