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SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Diagnostic
code No.
37
Fuel injector #2
48
Air cut-off valve
50
Fuel pump
51
Radiator fan motor relay
52
Headlight relay
54
ISC valve
Item
Actuates fuel injector #2 five
times at one-second inter-
vals.
The "CHECK" indicator and
"
nostic tool screen come on
each time the fuel injector is
actuated.
Actuates air cut-off valve five
times at one-second inter-
vals.
The "CHECK" indicator and
"
nostic tool screen come on
each time the air cut-off
valve is actuated.
Actuates the fuel pump five
times at one-second inter-
vals.
The "CHECK" indicator and
"
nostic tool screen come on
each time the fuel pump is
actuated.
Actuates the radiator fan mo-
tor relay five times at five-
second intervals.
The "CHECK" indicator and
"
nostic tool screen come on
each time the relay is actuat-
ed.
Actuates the headlight relay
five times at five-second in-
tervals.
The "CHECK" indicator and
"
nostic tool screen come on
each time the relay is actuat-
ed.
Fully closes the ISC valve,
and then opens the valve.
Fully closes the ISC valve,
and then opens the valve.
This operation takes approxi-
mately 6 seconds.
The "CHECK" indicator and
"
nostic tool screen come on
during the operation.
Actuation
" on the Yamaha diag-
" on the Yamaha diag-
" on the Yamaha diag-
" on the Yamaha diag-
" on the Yamaha diag-
" on the Yamaha diag-
9-9
Procedure
Disconnect the fuel pump
coupler.
Check that fuel injector #2 is
actuated five times by listen-
ing for the operating sound.
Check fuel operating sound
of the air cut-off valve five
time.
Check that the fuel pump is
actuated five times by listen-
ing for the operating sound.
Check that the radiator fan
motor relay is actuated five
times by listening for the op-
erating sound.
Check that the headlight re-
lay is actuated five times by
listening for the operating
sound.
The ISC unit vibrates when
the ISC valve operates.
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Troubleshooting
