Yamaha F150B Service Manual

Also see for F150B: Owner's manual Service manual Owner's manual

5-33ELEC Electrical system4. Connect the special service tool a andtest harness (3 pins) b.5. Apply negative pressure to the air pres-sure sensor slowly, and then measurethe output voltage.TIP:When checking the air pressure sensor, donot start the engine.6. Turn the engine start switch to “OFF,” anddisconnect the special service tool aand test harness b.7. Remove the junction box cover, and thendisconnect the engine ECM coupler b.8. Check the wiring harness for continuity.9. Connect the engine ECM coupler b, andthen install the junction box cover.10. Connect the air pressure sensor couplera.Checking the engine temperaturesensor1. Disconnect the engine temperature sen-sor coupler a.2. Turn the engine start switch to “ON,” andthen measure the input voltage at theengine temperature sensor coupler.Vacuum/pressure pump gauge set a:90890-06756Test harness (3 pins) b: 90890-06869Air pressure sensor output voltage:Pink/Green (P/G)–Black (B)3.21 V at –20.0 kPa(–0.20 kgf/cm2, –2.9 psi)2.16 V at –46.7 kPa(–0.467 kgf/cm 2, –6.8 psi)BBG G/WOabbP/GWiring harness continuity:Terminal 1–Terminal 10Terminal 2–Terminal 8Terminal 3–Terminal 33b10 83313 2ab