Yamaha F115A Service Manual page 588

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ELEC
ELECTRICAL COMPONENTS......................................................................... 8-1
(Port view) ................................................................................................ 8-1
(Starboard view) ...................................................................................... 8-2
(Front view) .............................................................................................. 8-3
(Aft view) .................................................................................................. 8-4
(Top view)................................................................................................. 8-5
WIRE HARNESS ............................................................................................. 8-6
ELECTRICAL COMPONENTS ANALYSIS ..................................................... 8-8
DIGITAL CIRCUIT TESTER....................................................................... 8-8
MEASURING THE PEAK VOLTAGE........................................................ 8-8
PEAK VOLTAGE ADAPTOR..................................................................... 8-8
MEASURING A LOW RESISTANCE........................................................ 8-9
IGNITION SYSTEM....................................................................................... 8-10
CHECKING THE BATTERY..................................................................... 8-11
CHECKING THE FUSES ......................................................................... 8-11
MEASURING THE IGNITION COIL ASSEMBLY................................... 8-11
CHECKING THE IGNITION SPARK GAP ............................................... 8-12
MEASURING THE IGNITION SYSTEM PEAK VOLTAGE .................... 8-13
IGNITION CONTROL SYSTEM .................................................................... 8-15
CHECKING THE BATTERY..................................................................... 8-16
CHECKING THE FUSES ......................................................................... 8-16
MEASURING THE PULSER COIL OUTPUT PEAK VOLTAGE.............. 8-16
MEASURING THE ENGINE COOLING WATER TEMPERATURE
SENSOR RESISTANCE ......................................................................... 8-16
CHECKING THE OIL PRESSURE SWITCH CONTINUITY..................... 8-17
MEASURING THE THROTTLE POSITION SENSOR ............................ 8-18
FUEL CONTROL SYSTEM............................................................................ 8-19
CHECKING THE BATTERY..................................................................... 8-20
CHECKING THE FUSES ......................................................................... 8-20
MEASURING THE ENGINE COOLING WATER TEMPERATURE
SENSOR RESISTANCE ......................................................................... 8-20
MEASURING THE THROTTLE POSITION SENSOR ............................ 8-20
CHECKING THE FUEL INJECTORS....................................................... 8-21
CHAPTER 8
ELECTRICAL SYSTEMS
E