Yamaha 2009 YZF-R1Y, Service Manual

Page: 450 / 526

FUEL INJECTION SYSTEM
8-63
3 Lean angle sensor malfunc-
tion Diagnostic mode (Code No.
08).
Sensor inspection procedure
Refer to “CHECKING THE
LEAN ANGLE SENSOR” on
page 8-117.
In vertical position: 0.4–1.4 V
When turned over:
3.7–4.4 V
Indication is incorrect.
→
Replace the lean angle sen-
sor.
Place the main switch to the
ON position.
(however, the engine cannot
be restarted unless the main
switch is first turned OFF)
No fault code indicated.
→
Recovered.
Fault code indicated.
→
Check the next step.
4 ECU malfunction Replace the ECU.
Fault code No. 33
Symptom Ignition coil #1 primary lead malfunction
Fail-safe action
Engine startup: Possible (depending on the number of failed cylin-
ders)
Riding: Possible (depending on the number of failed cylinders)
Diagnostic monitor-
ing code No.
D:30
Meter display
Actuates the cylinder-#1 ignition coil five times at one-second inter-
vals.
Illuminates the engine trouble warning light.
Checking method
Check the spark five times.
• Connect an ignition checker.
Item/components and
probable cause
Check or maintenance job
Sensor inspection proce-
dure
1 Connection of ignition coil
coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking). Poor connection
→
Connect
it securely or replace the wire
harness.
Start and idle the engine for
approximately 5 seconds.
Then, check the fault code
indication.
No fault code indicated.
→
Recovered.
Fault code indicated.
→
Check the next step.
Fault code No. 30
Symptom Turnover of vehicle
Fail-safe action
Engine startup: Impossible
Riding: Impossible
Diagnostic monitor-
ing code No.
D:08
Meter display
Lean angle sensor
• 0.4–1.4 (upright)
• 3.7–4.4 (overturned)
Checking method Remove the lean angle sensor and incline it more than 45 degrees.
Item/components and
probable cause
Check or maintenance job
Sensor inspection proce-
dure