Checking The Vapor Shut-Off Valve - Yamaha F225F Service Manual

ELEC
3. Turn the engine start switch to ON, and
then measure the input voltage between
the terminal a and ground, and the
terminal b and ground.
a
b
High-pressure fuel pump relay input
voltage:
Terminal a–Ground
Terminal b–Ground
12.0 V (battery voltage)
4. Turn the engine start switch to ON, and
then measure the input voltage between
the terminals b and c.
b
High-pressure fuel pump relay input
voltage:
Terminal b–Terminal c
12.0 V (battery voltage)
5. Turn the engine start switch to OFF.
6. Install the high-pressure fuel pump relay
a and relay cover.

Checking the vapor shut-off valve

1. Disconnect the vapor shut-off valve cou-
pler a.
5-39
Electrical system
c
2. Turn the engine start switch to ON, and
then measure the input voltage between
the vapor shut-off valve coupler terminal
and ground.
R/Y
Vapor shut-off valve input voltage:
Red/Yellow (R/Y)–Ground
12.0 V (battery voltage)
3. Remove the vapor shut-off valve, and
then connect the special service tool a
to the vapor shut-off valve.
Vacuum/pressure pump gauge set a:
90890-06756
4. Apply the specified negative pressure to
the vapor shut-off valve.
Specified negative pressure:
67.0 kPa (0.67 kgf/cm
5. Check that the vapor shut-off valve
opens and the negative pressure is
released when the battery leads are
connected to the vapor shut-off valve
terminals. NOTICE: Do not connect
the battery leads to the vapor shut-off
valve terminals for more than a few
seconds.
a
2
, 9.7 psi)
a