6Y8 Multifunction Meters Sensor; Checking The Water Pressure Sensor - Yamaha F30B 2018 Service Manual

6Y8 Multifunction Meters sensor

Checking the water pressure sensor

1. Measure:
• Water pressure sensor input voltage
Out of specification  Check the wire har-
ness for continuity.
Input voltage
5 V
Orange (Or)–Black (B)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the water pressure sensor
coupler "a".
b. Turn the engine start switch to ON, and
then measure the input voltage at the wa-
ter pressure sensor coupler.
a
c. Connect the water pressure sensor cou-
pler.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Measure:
• Water pressure sensor output voltage
Out of specification  Replace the water
pressure sensor.
Output voltage at 392 kPa (3.92
kgf/cm², 56.8 psi) (reference data)
2.5 V
Output voltage at 784 kPa (7.84
kgf/cm², 113.7 psi) (reference da-
ta)
4.5 V
Blue/Black (L/B)–Black (B)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the water pressure sensor, and
then connect the pressure pump "1" and
special service tool "2".
b. Turn the engine start switch to ON.
c. Apply positive pressure to the water pres-
sure sensor slowly, and then measure the
output voltage.
B Or
d. Turn the engine start switch to OFF, and
then disconnect the special service tool
and pressure pump.
e. Install the water pressure sensor.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5-42
6Y8 Multifunction Meters sensor
a
Pressure pump "1"
(commercially available)
Test harness (3 pins) "2"
90890-06869
Test harness (3 pins) "2"
YB-06869
B Or