Yamaha YZFR1Y(C) 2009 Service Manual page 460

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Actuator oper-
ation
D:40
Checking
method
Actuator oper-
ation
D:41
Checking
method
Actuator oper-
ation
D:42
Checking
method
Actuator oper-
ation
D:43
Checking
method
Item/components and
probable cause
1 Locate the malfunction
2 Connection of secondary
injector coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
40
Open or short circuit of secondary injector lead
Engine startup: Possible (depending on the number of failed cylin-
ders)
Riding: Possible (depending on the number of failed cylinders)
D:40
D:41
D:42
D:43
Actuates the secondary injector #1 five times at one-second inter-
vals.
Illuminates the engine trouble warning light.
Check the operating sound of the secondary injector #1 five times.
Actuates the secondary injector #2 five times at one-second inter-
vals.
Illuminates the engine trouble warning light.
Check the operating sound of the secondary injector #2 five times.
Actuates the secondary injector #3 five times at one-second inter-
vals.
Illuminates the engine trouble warning light.
Check the operating sound of the secondary injector #3 five times.
Actuates the secondary injector #4 five times at one-second inter-
vals.
Illuminates the engine trouble warning light.
Check the operating sound of the secondary injector #4 five times.
Check or maintenance job
Check in the diagnostic mode
(Code No. 40, 41, 42, 43).
Refer to "CHECKING THE
FUEL INJECTORS" on page
8-128.
Poor connection → Connect
it securely, or repair/replace
the wire harness.
8-73
FUEL INJECTION SYSTEM
Sensor inspection proce-
—
Check the injector's operating
noise by the diagnostic mode
(Code No.40–43).
Injector's operating noise →
Reset with the diagnostic
code 63. Recovered.
No injector's operating noise
→ Check the next step.
dure