Yamaha YZF-R1(B) 2012 Service Manual page 472

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
1 Locate the malfunction
2 Connection of primary injec-
tor coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
3 Primary injector malfunction
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
Check in the diagnostic mode
(Code No. 36, 37, 38, 39).
Refer to "CHECKING THE
FUEL INJECTORS" on page
8-148.
Poor connection → Connect
it securely, or repair/replace
the wire harness.
Refer to "CHECKING THE
FUEL INJECTORS" on page
8-148.
Fuel injection inspection
method.
FUEL INJECTION SYSTEM
8-75
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.