Yamaha FZ1-N Service Manual page 374

Diag-
nostic
code
No.
Sub-throttle servo motor
56
EAS27460
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Check and ser-
vice the items or components that are the probable cause of the malfunction following the order
given.
After the check and service of the malfunctioning part has been completed, reset the meter display
according to the reinstatement method.
Fault code No.:
Code number displayed on the meter when the engine failed to work normally. Refer to Self-Diag-
nostic Function table.
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated. Refer to "DIAGNOSTIC
MODE" on page 8-42.
Fault code No.
Diagnostic code No.
Orde Item/components and probable
r
Installed condition of cylinder identifi-
1
cation sensor.
Connections
• Cylinder identification sensor cou-
pler
2 • Main wire harness ECU coupler
• Sub-wire harness coupler
Open or short circuit in wire harness.
3
Defective cylinder identification sen-
sor.
4
Item
No normal signals are received from the cylinder identifi-
11 Symptom
—
cause
FUEL INJECTION SYSTEM
Actuation
Actuate the servo motor turns
to close side and to open
side.
Illuminates the engine trou-
ble warning light only while
the motor is runnning.
cation sensor when the engine is started or while the
vehicle is being driven.
Check or maintenance job
Check for looseness or pinching. Starting the
• Check the coupler 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 coupler
securely.
• Repair or replace if there is an
open or short circuit.
• Between the cylinder identifica-
tion sensor coupler and ECU
coupler
(Blue–Blue)
(White/Black–White/Black)
(Black/Blue–Black/Blue)
• Replace if defective.
Refer to "CHECKING THE
CYLINDER IDENTIFICATION
SENSOR" on page 8-111.
8-50
Checking method
Check the operating sound
of the Sub-throttle servo
motor.
—
Reinstatement
engine and
operate it at
idle.
method