Yamaha YZFR1W 2007 Service Manual page 372

Fault code No. 34
Diagnostic code No.
Orde Item/components and probable
r cause
1 Connections
• Cylinder-#2 ignition coil coupler
• Main wire harness ECU coupler
• Sub-wire harness 1 coupler
2 Open or short circuit in wire harness
and/or sub-wire harness 1.
3 Defective cylinder-#2 ignition coil.
Open circuit detected in the primary lead of the cylinder-
Symptom
#2 ignition coil.
31 Cylinder-#2 ignition coil
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 cylinder-#2 ignition
• Execute the diagnostic mode.
• Test the primary and secondary
• Replace if defective.
8-53
FUEL INJECTION SYSTEM
that may be pulled out.
the couplers.
and connect the coupler
securely.
open or short circuit.
coil coupler and ECU coupler.
(Red/Black–Red/Black)
(Gray/Red–Gray/Red)
(Code No.31)
coils for continuity.
Refer to "CHECKING THE
IGNITION COILS" on page 8-
91.
Reinstatement
method
Cranking the
engine.
(Connect the
cylinder-#2 igni-
tion coil cou-
pler.)