Yamaha YZF-R125 Service Manual: Checking the fid (fast idle solenoid)
1. Disconnect:
- FID (fast idle solenoid) coupler
2. Check:
- FID (fast idle solenoid) resistance
a. Disconnect the FID (fast idle solenoid) coupler from the FID.
b. Connect the pocket tester ( 
× 10)
to the terminals
of the FID (fast idle solenoid).
- Positive tester probe
red/black terminal "1" - Negative tester probe
yellow/red terminal "2"
c. Measure the FID (fast idle solenoid) resistance.
Out of specification Replace
the throttle
body assembly.
Intake air temperature sensor
1. Check:
Intake air temperature sensor resistance
Out of specification Replace
the throttle
body.
a. Connect the pocket tester ( ×
1k) to the
throttle body sensor assembly co ...
Troubleshooting
...
Other materials:
Checking the turn signal relay
1. Check:
Turn signal relay input voltage
Out of specification →The wiring circuit
from
the main switch to the turn signal relay coupler
is faulty and must be repaired.
a. Connect the pocket tester (DC 20 V) to the
turn signal relay terminal as shown.
- Positive tester probe
b ...
Main switch/steering lock
Main switch/steering lock
The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
positions are described below.
ON
All electrical circuits are supplied with
power, the meter lighting, taillight, license
plate light and ...
Types of bulbs
The bulbs used on this vehicle are shown in the
illustration.
Bulbs "a" and "b" are used for the headlights
and usually use a bulb holder that must be detached
before removing the bulb. The majority
of these types of bulbs can be removed from
their respective socket by turning them coun ...