Yamaha F200B, Service Manual

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5-41
ELEC
Electrical system
5. Apply positive pressure to the water
pressure sensor slowly, and then mea-
sure the output voltage at the specified
pressures.
6. Turn the engine start switch to OFF, and
then disconnect the special service tool
and pressure pump.
7. Install the water pressure sensor. See
steps 2 and 3 in “Installing the water
pressure sensor (optional)” (3-13).
8. Remove the engine ECM, and then dis-
connect engine ECM couplers
b
and
c
.
9. Check the wiring harness for continuity.
10. Connect the engine ECM couplers.
NOTICE: Make sure that the rubber
seal is installed properly in each
engine ECM coupler.
11. Install the engine ECM, and then tighten
the engine ECM bolts to the specified
torque.
12. Connect the water pressure sensor cou-
pler.
13. Install the engine ECM cover.
Checking the speed sensor
(optional)
1. Remove the engine ECM cover.
2. Disconnect the speed sensor coupler
a
.
3. Turn the engine start switch to ON, and
then measure the input voltage at the
speed sensor coupler.
Pressure pump
1
:
(commercially available)
Test harness (3 pins)
2
:
90890-06869
Water pressure sensor output voltage
(reference data):
Blue/Black (L/B)–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)
2
2
1
B
B
G
G/W
O
L/B
c
b
Wiring harness continuity:
a
Terminal 1–
c
Terminal 48
a
Terminal 2–
b
Terminal 18
a
Terminal 3–
c
Terminal 42
Engine ECM bolt:
7 N·m (0.7 kgf·m, 5.2 ft·lb)
1 2 3
a
c
b
18
42
48