Yamaha FZ1-N Service Manual page 388

Fault code No.
Diagnostic code No.
Item/components and probable
Order
Connections
• Injector coupler
• Main wire harness ECU coupler
1 • Sub-wire harness coupler
Open or short circuit in wire harness
and/or sub-wire harness.
2
Defective primary injector.
3
39 Symptom
36
37
38
39
cause
FUEL INJECTION SYSTEM
Open circuit detected in a injector.
Injector #1
Injector #2
Injector #3
Injector #4
Check or maintenance job
• Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the copler
securely.
• Repair or replace if there is an
open or short circuit.
• Between primary injector cou-
pler and 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)
• Execute the diagnostic mode.
(Code Nos.36, 37, 38, 39)
• Replace if defective.
Refer to "CHECKING THE
INJECTORS" on page 7-8.
8-64
Reinstatement
method
Start the engine
and operating it
at idle.