Yamaha F150A, Service Manual

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6Y8 Multifunction Meter sensor
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6Y8 Multifunction Meter sensor
Checking the water pressure sensor
(optional)
1. Disconnect the water pressure sensor
coupler “a”.
2. Turn the engine start switch to ON, and
then measure the input voltage at the
water pressure sensor coupler.
3. Remove the water pressure sensor, and
then connect the pressure pump “1” and
special service tool “2”.
4. Apply positive pressure to the water pres-
sure sensor slowly, and then measure
the output voltage.
5. Turn the engine start switch to OFF, and
then disconnect the special service tool
and pressure pump.
6. Install the water pressure sensor, and
then connect the water pressure sensor
coupler. See “Installing the water pres-
sure sensor” (3-14).
Checking the speed sensor
(optional)
1. Disconnect the speed sensor coupler “a”.
2. Turn the engine start switch to ON, and
then measure the input voltage at the
speed sensor coupler.
3. Remove the speed sensor, and then con-
nect the pressure pump “1” and special
service tool “2”.
4. Apply positive pressure to the speed sen-
sor slowly, and then measure the output
voltage.
Water pressure sensor input voltage:
Orange (O)–Black (B)
4.75–5.25 V
Pressure pump “1”:
(commercially available)
Test harness (3 pins) “2”: 90890-06869
B O
a
L/W
O
B
B G/W G
2
1
2
Water pressure sensor output voltage
(reference data):
Blue/White (L/W)–Black (B)
2.5 V at 392.0 kPa
(3.92 kgf/cm
2
, 56.8 psi)
4.5 V at 784.0 kPa
(7.84 kgf/cm
2 , 113.7 psi)
Speed sensor input voltage:
Orange (O)–Black (B)
4.75–5.25 V
B O
a