Yamaha XF50W Service Manual page 268

Fault code No. 61
Used diagnostic code No. --
Inspection operation item and
Order
probable cause
1 1 1 Connected condition of con-
nector
Inspect the coupler for any
pins that may have pulled
out.
Check the locking condition
of the coupler.
2 2 2 Open or short circuit in lead.
3 3 3 Detective ISC (idle speed con-
trol) valve
FUEL INJECTION SYSTEM
Symptom ISC (idle speed control) valve open or short circuit is detected.
Operation item and countermeasure
If there is a malfunction, repair it and connect
it securely.
ISC (idle speed control) valve coupler
Main wiring harness ECU coupler
Repair or replace if there is an open or short
circuit.
Between ISC (idle speed control) valve and
ECU coupler/main harness
pink- pink
green/yellow-green/yellow
gray - gray
sky blue-sky blue
Execute diagnostic mode (code No.D54)
Replace the throttle body.
NOTE:
Do not remove the ISC (idle speed control)
valve.
Refer to "THROTTLE BODY AND FUEL IN-
JECTOR ".
7-25
FI ifl
Reinstatement
method
Reinstated by set- Reinstated by set- Reinstated by set-
ting the main switch ting the main switch ting the main switch
to ON, The ISC (idle to ON, The ISC (idle to ON, The ISC (idle
speed control) valve speed control) valve speed control) valve
fully closes, and fully closes, and fully closes, and
then it opens until it then it opens until it then it opens until it
is at the standby is at the standby is at the standby
opening position opening position opening position
when the engine is when the engine is when the engine is
started. started. started.