Cam Position Sensor - Yamaha WaveRunner FX SHO Service Manual

– +
ELEC
Control system
1
G/O
B/O
È
a b c
B/O O
B W
È
7-36

Cam position sensor

1. Measure:
• Cam position sensor input voltage
Out of specification → Check the wiring
harness.
Measurement steps:
1. Disconnect the cam position sensor cou-
pler 1.
2. Push the unlock button, and then measure
the input voltage at the cam position sen-
sor coupler terminals (wiring harness end).
Cam position sensor input voltage
(reference data):
Orange (O) – Black/orange (B/O)
4.75–5.25 V
2. Measure:
• Cam position sensor output voltage
Out of specification → Replace the cam
position sensor.
Measurement steps:
1. Remove the cam position sensor.
Refer to "Cylinder head cover removal" in
Chapter 5.
2. Connect the test harness (3 pins) to the
cam position sensor.
3. Push the unlock button, and then measure
the output voltage when a screwdriver is
passed under the cam position sensor in
direction È as shown.
Test harness (3 pins):
YB-06877
Test harness HM090-3 (3 pins):
90890-06877
Cam position sensor output voltage:
Green/orange (G/O) –
Black/orange (B/O)
Position
a, c
b
E
Voltage (V)
More than 4.8
Less than 0.8
1
2
3
4
5
6
7
8
9