Intake Air Pressure Sensor - Yamaha WaveRunner FZR-GX1800 Service Manual

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ELEC
1
Control system
B/O O

Intake air pressure sensor

1. Measure:
• Intake air pressure sensor input voltage
Out of specification → Check the wiring
harness.
Measurement steps:
1. Disconnect the intake air pressure sensor
coupler 1.
2. Push the unlock button, and then measure
the input voltage at the intake air pressure
sensor coupler terminals (wiring harness
end).
Intake air pressure sensor input
voltage (reference data):
Orange (O) – Black/orange (B/O)
4.75–5.25 V
2. Check:
• Intake air pressure sensor operation
Does not operate → Replace the intake
air pressure sensor.
Checking steps:
1. Connect the special service tool to the
intake air pressure sensor.
2. Connect a computer to the watercraft and
use the YDIS to display the intake air pres-
sure.
3. Push the unlock button.
4. Apply negative pressure to the intake air
pressure sensor slowly and check that the
displayed intake air pressure decreases.
Lower unit pressure/vacuum tester:
YB-35956-A
Vacuum/pressure pump gauge set:
90890-06756
7-25
E
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