Yamaha YZFR1Y(C) 2009 Service Manual page 463

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
6 Continuity of wire harness
7 ECU malfunction
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
Open or short circuit →
Replace the wire harness.
Secondary injector #1
Red/Blue–Red/Blue
White/Blue–White/Blue
Secondary injector #2
Red/Blue–Red/Blue
Sky blue/White–Sky blue/
White
Secondary injector #3
Red/Blue–Red/Blue
Brown/Yellow–Brown/Yellow
Secondary injector #4
Red/Blue–Red/Blue
Brown/Black–Brown/Black
Replace the ECU.
8-76
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