Yamaha WaveRunner VXR VX1800A, Service Manual

Page: 249 / 318

Indication system
7-42
3. If the light and indicator do not blink, check
the “Diagnosis record” of the YDIS. If a di-
agnosis record is available and the light
and indicator do not blink, replace the mul-
tifunction meter.
4. Connect the engine temperature sensor
coupler.
Diagnostic display check
1. Create a condition so that a diagnostic
code is recorded.
2. Supply power to the ECM, and then check
that the “WARNING” indicator light “a”
blinks and the diagnostic code “b” is indi-
cated.
3. If the diagnostic code is not indicated,
check the “Diagnosis record” of the YDIS.
If a diagnosis record is available and the
diagnostic code is not indicated, replace
the multifunction meter.
Oil pressure warning indicator check
1. Disconnect the oil pressure switch coupler
“a”, and then ground the terminal.
2. Start the engine, and then increase the en-
gine speed to 6000 r/min or more.
3. Check that the oil pressure warning indica-
tor “a”, the check engine warning indicator
“b”, and the “WARNING” indicator light “c”
blink, and the buzzer sounds intermittently
for 30 seconds.
4. If the light and indicator do not blink, check
the “Diagnosis record” of the YDIS. If a di-
agnosis record is available and the light
and indicator do not blink, replace the mul-
tifunction meter.
5. Connect the oil pressure switch coupler.
Engine overheat warning indicator
check
1. Disconnect the thermo switch coupler “a”,
and then connect the jumper lead “1” to the
thermo switch coupler terminals (wire har-
ness end).
2. Start the engine and operate it at trolling
speed for about 2 minutes.
3. Check that the engine overheat warning
indicator “a”, the check engine warning in-
dicator “b”, and the “WARNING” indicator
light “c” blink, and the buzzer sounds inter-
mittently. After 5 seconds, check that the
engine overheat warning indicator and the
“WARNING” indicator light stop blinking
b
a
a
P/W
a b c
a
B P
1