Yamaha F150A Service Manual

Also see for F150A: Rigging guide Service manual Owner's manual Owner's manual Owner's manual

2-6Electronic control system012345678910AFail-safe controlIf the electrical components malfunction, the engine ECM controls the ignition and fuel injection asshown in the table.*1. Control mode when the part malfunctions.Troublecode Item Trouble conditions to be detected13 Pulser coil No signal is sent from one of two sensors 4 or moreconsecutive times.15 Engine temperature sensorOpen or short circuit in the engine temperature sensorcircuit.Output voltage is less than 0.18 V or more than 4.93 V.When the engine starts: Set to 5 °C (41 °F), 20 °C(68 °F), or 40 °C (104 °F) depending on the signalfrom the air temperature sensor. *118 TPSOpen or short circuit in the TPS circuitOutput voltage is less than 0.3 V or more than 4.7 V.Determines the fully closed position of the throttlebased on the signal from the air pressure sensor. *119 Battery voltage Voltage is less than 12 V for 2 minutes, even whenengine speed is more than 2000 r/min.23 Air temperature sensorOpen or short circuit in the air temperature sensorcircuit.Output voltage is less than 0.1 V or more than 4.61 V.Set to 40 °C (104 °F). *128 Shift position switchCranking while in gear.Cranking while the shift position circuit is open-circuited.29 Air pressure sensorOpen or short circuit in the air pressure sensor circuit.Output voltage is less than 0.2 V or more than 4.5 V.Temporarily sets air pressure levels based on theengine speed and the TPS signal. *137 Intake air passageThe shift position switch is off, the throttle is fullyclosed, the ISC valve is fully closed, and the enginespeed is more than 1200 r/min.39 Oil pressure sensor Open or short circuit in the oil pressure sensor circuit.Output voltage is less than 0.3 V or more than 4.8 V.45 Shift cut-off switchOutput voltage is more than 4.5 V, the switch is ONwhen the engine is started, or both the shift cut-offswitch and shift position switch are ON for 5 seconds.46 Thermoswitch Not detected86 Immobilizer (Y-COP)Open or short circuit in the Y-COP circuit.Communication error continues for more than 3seconds.