Yamaha F150A Service Manual page 259

- +
ELEC
Special service tools .....................................................................................8-1
Checking the electrical components............................................................ 8-2
Measuring the peak voltage ...................................................................... 8-2
Measuring the lower resistance.................................................................8-2
Electrical components................................................................................... 8-3
Port view.................................................................................................... 8-3
Junction box assembly ..............................................................................8-4
Aft view ...................................................................................................... 8-5
Top view .................................................................................................... 8-6
Wiring harness........................................................................................... 8-7
Ignition and ignition control system ............................................................ 8-9
Checking the ignition spark gap ..............................................................8-11
Checking the spark plug wires.................................................................8-11
Checking the ignition coils ....................................................................... 8-11
Checking the ECM...................................................................................8-12
Checking the pulser coil ..........................................................................8-12
Checking the throttle position sensor ......................................................8-13
Checking the intake air temperature sensor............................................8-13
Checking the engine temperature sensor................................................ 8-13
Checking the thermoswitch ..................................................................... 8-14
Checking the shift cut switch ................................................................... 8-14
Checking the neutral switch..................................................................... 8-14
Fuel control system .....................................................................................8-15
Checking the injectors ............................................................................. 8-17
Checking the main relay ..........................................................................8-17
Checking the electric fuel pump ..............................................................8-17
Starting system ............................................................................................ 8-18
Checking the fuses .................................................................................. 8-19
Checking the starter relay........................................................................8-19
Starter motor ................................................................................................8-20
Removing the starter motor pinion .......................................................... 8-22
Checking the starter motor pinion............................................................ 8-22
Checking the armature ............................................................................8-22
Checking the brushes.............................................................................. 8-23
Checking the magnet switch.................................................................... 8-23
Checking the starter motor operation ......................................................8-23
Charging system .......................................................................................... 8-24
Checking the stator coil ...........................................................................8-25
Checking the Rectifier Regulator............................................................. 8-25
63P3F11
Electrical systems
1
2
3
4
5
6
7
8
9