Yamaha 2009 YZF-R1 (Y) Service Manual page 469

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
3 Secondary injector malfunc-
tion
4 Connection of main harness
ECU 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
Refer to "CHECKING THE
FUEL INJECTORS" on page
8-144.
Fuel injection inspection
method.
Poor connection → Connect
it securely, or repair/replace
the wire harness.
FUEL INJECTION SYSTEM
8-78
Sensor inspection proce-
dure
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.
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.