Yamaha YZ450FA 2011 Owner's Service Manual page 274

CHECKING THE FAULT CODES
1. Set the switch on the FI diagnostic tool sub-
wire harness to "ON".
When the switch on the FI diagnostic tool sub-
wire harness is set to "ON", make sure that
"Waiting for connection" is displayed on the
LCD of the FI diagnostic tool.
2. Check:
• Fault code number
• If a malfunction is detected in the system, the
fault code appears on the LCD of the FI diag-
nostic tool and the "WARNING" LED (orange)
comes on.
• To start the engine, set the switch on the FI di-
agnostic tool sub-wire harness to "OFF".
• When the engine is running, fault code num-
bers will not be displayed on the LCD of the FI
diagnostic tool even if a malfunction is detect-
ed in the system. The "WARNING" LED (or-
ange) comes on.
2100
3. Set the switch on the FI diagnostic tool sub-
wire harness to "OFF".
SETTING THE DIAGNOSTIC MODE
When the FI diagnostic tool is set to the diag-
nostic mode, the sensor output data can be dis-
played and the operation of the actuators can
be checked.
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60
7-12
FUEL INJECTION SYSTEM
1. While pressing the "MODE" button, set the
switch on the FI diagnostic tool sub-wire har-
ness to "ON".
• When the switch on the FI diagnostic tool sub-
wire harness is set to "ON", make sure that
"Waiting for connection" is displayed on the
LCD of the FI diagnostic tool.
• "DIAG" appears on the LCD of the FI diagnos-
tic tool.
2. Select the diagnostic mode "DIAG" by
pressing the "UP" button.
3. After selecting "DIAG", press the "MODE"
button.
4. Select the diagnostic code number corre-
sponding to the fault code number by press-
ing the "UP" and "DOWN" buttons.
• Select the diagnostic code number corre-
sponding to the fault code number by press-
ing the "UP" and "DOWN" buttons.
• To decrease the selected diagnostic code
number, press the "DOWN" button. Press the
"DOWN" button for 1 second or more to auto-
matically decrease the diagnostic code num-
bers.
• To increase the selected diagnostic code
number, press the "UP" button. Press the
"UP" button for 1 second or more to automat-
ically increase the diagnostic code numbers.
5. Check the operation of the sensor or actua-
tor.
• Sensor display: Data indicating the sensor
status is displayed on the LCD of the FI di-
agnostic tool.
• Actuator operation: Press the "MODE" but-
ton to operate the actuator.
6. Set the switch on the FI diagnostic tool sub-
wire harness to "OFF".