Yamaha R1 Series 2015, Service Manual

Page: 546 / 704

FUEL INJECTION SYSTEM
8-65
03
Meter display
Displays the intake air pressure.
Procedure
Operate the throttle while pushing the “ ” side of the start/engine stop
switch. (If the display value changes, the performance is OK.)
02 Meter display Displays the atmospheric pressure.
Procedure Compare the actually measured atmospheric pressure with the meter
display value.
Item Probable cause of
malfunction and check
Maintenance job Confirmation of service com-
pletion
1 Defective Intake air pressure
sensor.
Execute the diagnostic mode.
(Code No. 03)
When engine is stopped:
Atmospheric pressure at the
current altitude and weather
conditions is indicated.
0 m above sea level: Approx.
101 kPa (757.6 mmHg, 29.8
inHg)
3000 m (9800 ft) above sea
level: Approx. 70 kPa (525.0
mmHg, 20.7 inHg)
Displayed value is incorrect
o
Check the Intake air pressure
sensor.
Replace if defective.
Refer to “CHECKING THE
INTAKE AIR PRESSURE SEN-
SOR” on page 8-194.
Turn the main switch to “ON”.
Fault code number is not dis-
played
o
Service is finished.
Fault code number is displayed
o
Go to item 2.
2 Defective atmospheric pressure
sensor.
Execute the diagnostic mode.
(Code No. 02)
When engine is stopped:
Atmospheric pressure at the
current altitude and weather
conditions is indicated.
0 m above sea level: Approx.
101 kPa (757.6 mmHg, 29.8
inHg)
3000 m (9800 ft) above sea
level: Approx. 70 kPa (525.0
mmHg, 20.7 inHg)
Displayed value is incorrect
o
Check the atmospheric pres-
sure sensor.
Replace if defective.
Refer to “CHECKING THE
ATMOSPHERIC PRESSURE
SENSOR” on page 8-193.
Turn the main switch to “ON”.
Fault code number is not dis-
played
o
Service is finished.
Fault code number is displayed
o
Go to item 3.
3 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (Engine Control Unit)” on
page 8-180.
Fault code No. 20
Item
Intake air pressure sensor or atmospheric pressure sensor: when
the main switch is turned to “ON”, the Intake air pressure sensor
voltage and atmospheric pressure sensor voltage differ greatly.