Yamaha YZF-R1(B) 2012 Service Manual page 473

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Actuator oper-
ation
D:36
Checking
method
Actuator oper-
ation
D:37
Checking
method
Actuator oper-
ation
D:38
Checking
method
Actuator oper-
ation
D:39
Checking
method
Item/components and
probable cause
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).
5 Connection of primary injec-
tor sub-wire harness coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking)
39
Open or short circuit of primary injector lead
Engine startup: Possible (depending on the number of failed cylin-
ders)
Riding: Possible (depending on the number of failed cylinders)
D:36
D:37
D:38
D:39
Actuates the primary injector #1 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the primary injector #1 five times.
Actuates the primary injector #2 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the primary injector #2 five times.
Actuates the primary injector #3 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the primary injector #3 five times.
Actuates the primary injector #4 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the primary injector #4 five times.
Check or maintenance job
Poor connection → Connect
it securely, or repair/replace
the wire harness.
Poor connection → Connect
it securely, or repair/replace
the wire harness.
FUEL INJECTION SYSTEM
8-76
Sensor inspection proce-
dure
Start the engine and let it idle
for approximately 5 seconds,
and check the fault code indi-
cation.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start the engine and let it idle
for approximately 5 seconds,
and check the fault code indi-
cation.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.