Yamaha YZFR1W 2007 Service Manual page 375

Fault code No. 39
Diagnostic code No.
Orde Item/components and probable
r cause
1 Connections
• Injector coupler
• Main wire harness ECU coupler
• Sub-wire harness 2 coupler
2 Open or short circuit in wire harness
and/or sub-wire harness 2.
3 Defective injector.
Symptom Open circuit detected in injector.
36 Injector #1
37 Injector #2
38 Injector #3
39 Injector #4
Check or maintenance job
• Check the couplers for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between injector coupler and
• Execute the diagnostic mode.
• Replace if defective.
8-56
FUEL INJECTION SYSTEM
that may have pulled out.
the couplers.
and connect the coupler
securely.
open or short circuit.
ECU coupler.
(Red/Blue–Red/Blue)
#1: (Red/Black–Red/Black)
#2: (Green/Black–Green/Black)
#3: (Blue/Black–Blue/Black)
#4: (Orange/Black–Orange/
Black)
(Code Nos.36, 37, 38, 39)
Refer to "CHECKING THE
INJECTORS" on page 7-6.
Reinstatement
method
Cranking the
engine.
(Connect the
fuel injector
couplers.)