Yamaha R1 Series 2015, Service Manual

Page: 560 / 704

FUEL INJECTION SYSTEM
8-79
41
Actuation
Actuates secondary injector #2 five times at one-second intervals.
Illuminates the engine trouble and system warning light.
Procedure
Check that secondary injector #2 is actuated five times by listening for
the operating sound.
42
Actuation
Actuates secondary injector #3 five times at one-second intervals.
Illuminates the engine trouble and system warning light.
Procedure
Check that secondary injector #3 is actuated five times by listening for
the operating sound.
43
Actuation
Actuates secondary injector #4 five times at one-second intervals.
Illuminates the engine trouble and system warning light.
Procedure
Check that secondary injector #4 is actuated five times by listening for
the operating sound.
Item Probable cause of
malfunction and check
Maintenance job Confirmation of service com-
pletion
1 Identify the malfunctioning sec-
ondary injector.
Execute the diagnostic mode.
(Code No. 40, 41, 42, 43)
Identify the secondary injector
that does not produce an oper-
ating sound.
Perform the following proce-
dures for the defective second-
ary injector.
Refer to “CHECKING THE
FUEL INJECTORS” on page
8-196.
2 Connection of secondary injec-
tor coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
Improperly connected
o
Con-
nect the coupler securely or
replace the wire harness.
Execute the diagnostic mode.
(Code No. 40, 41, 42, 43)
No operating sound
o
Go to
item 3.
Operating sound
o
Go to item
8.
3 Defective secondary injector. Measure the secondary injector
resistance.
Replace if out of specification.
Refer to “CHECKING THE
FUEL INJECTORS” on page
8-196.
Execute the diagnostic mode.
(Code No. 40, 41, 42, 43)
No operating sound
o
Go to
item 4.
Operating sound
o
Go to item
8.
4 Connection of wire harness
ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
Improperly connected
o
Con-
nect the coupler securely or
replace the wire harness.
Execute the diagnostic mode.
(Code No. 40, 41, 42, 43)
No operating sound
o
Go to
item 5.
Operating sound
o
Go to item
8.
5 Connection of sub-wire har-
ness coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
Improperly connected
o
Con-
nect the coupler securely or
replace the wire harness.
Execute the diagnostic mode.
(Code No. 40, 41, 42, 43)
No operating sound
o
Go to
item 6.
Operating sound
o
Go to item
8.
Fault code No. 40
Item Secondary injector: open or short circuit detected.