Yamaha 2009 YZF-R1 (Y) User Manual

FUEL INJECTION SYSTEM
8-56
Fault code No. 20
Symptom
When the main switch is ON, there is a big difference in voltage
value of the intake air pressure sensor and atmospheric pressure
sensor
Fail-safe action
Engine startup: Possible
Riding: Possible
Diagnostic monitor-
ing code No.
D:03
D:02
D:03
Meter display Displays the intake air pressure.
Checking
method
Set the engine stop switch to “ ”, and then push the start switch
“ ”. (If the display value changes, the performance is OK.)
D:02
Meter display Displays the atmospheric pressure.
Checking
method
Compare the actually measured atmospheric pressure with the
meter display value.
Item/components and
probable cause
Check or maintenance job
Sensor inspection proce-
dure
1 Intake air pressure sensor
malfunction
Check in 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
3000 m above sea level:
Approx. 70 kPa
Incorrect indication → Sensor
malfunction → Replace the
intake air pressure sensor.
Sensor inspection procedure
Refer to “CHECKING THE
INTAKE AIR PRESSURE
SENSOR” on page 8-141.
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.

Yamaha 2009 YZF-R1 (Y) Specifications

General

Bore x Stroke	78.0 mm x 52.2 mm
Compression Ratio	12.7:1
Fuel System	Fuel injection with YCC-T and YCC-I
Ignition	TCI: Transistor Controlled Ignition
Transmission	6-speed w/multiplate slipper clutch
Final Drive	Chain
Front Tire	120/70-ZR17
Rear Tire	190/55-ZR17
Seat Height	835 mm
Wet Weight	206 kg
Engine Type	Liquid-cooled, 4-stroke, DOHC, inline 4-cylinder
Front Suspension	43 mm inverted fork, fully adjustable
Rear Suspension	Single shock, fully adjustable
Front Brakes	Dual 310 mm discs, radial-mount 6-piston calipers
Rear Brakes	220 mm disc, single-piston caliper
Dimensions (L x W x H)	2, 070 mm x 715 mm x 1, 130 mm
Wheelbase	1415 mm
Fuel Capacity	18 L