Engine Overheat Warning Indicator; Buzzer - Yamaha WaveRunner FX SHO Service Manual

– +
ELEC
Indication system
2
1
P
B/O
4
1
3
L/R B/L
7-74

Engine overheat warning indicator

1. Check:
• Engine overheat warning indicator
Does not come on → Check the "Diag-
nosis record" of the YDIS.
Checking steps:
1. Disconnect the thermoswitch coupler 1.
2. Connect the jumper lead 2 to the ther-
moswitch coupler terminals (wiring har-
ness end).
3. Start the engine and operate it at trolling
speed for about 2 minutes.
4. Check that the "WARNING" indicator light
3 and the engine overheat warning indi-
cator 4 blink, and then come on, and the
buzzer begins to sound intermittently, and
then it sounds continuously.
5. If the light and indicator do not blink, check
the "Diagnosis record" of the YDIS. If a
diagnosis record is available and it is
caused by the checking steps, replace the
multifunction meter.

Buzzer

1. Measure:
• Buzzer input voltage
Out of specification → Check the wiring
harness.
Measurement steps:
1. Disconnect the buzzer coupler 1.
2. Push the unlock button, and then measure
the input voltage at the buzzer coupler ter-
minals (wiring harness end).
Buzzer input voltage (reference data):
Blue/red (L/R) – Black/blue (B/L)
11.0–12.0 V
E
1
2
3
4
5
6
7
8
9