ENGINE CONTROL SYSTEM 3-33
Battery
ECM
OFF
ON
START
Remo-con box
60A fuse
12V power supply
Battery
charge
coil
Rectifier &
regulator
30A Fuse
Neutral switch
Neutral switch
Ignition switch
Starter motor
Starter relay
ECM main relay
Starter magnetic switch
START-IN-GEAR PROTECTION SYSTEM
A switch to detect neutral gear position is located on the cylinder block (STBD side) and operated by the
clutch control lever.
This ON / OFF type switch is “ON” in neutral and “OFF” in forward or reverse.
On starting the engine, the ECM detects the shift position using the neutral switch. When the neutral switch is
“OFF”, the ECM does not provide injector operating signal.
This neutral switch is also used to regulate the starter motor circuit.
The engine will not start, even by emergency rope, with the shift in the forward or reverse position.
SHIFT POSITION
NEUTRAL
SWITCH
OPERATION
Fuel injector Ignition Fuel pump Starter motor
Neutral
ONYesYesYesYes
Forward / Reverse
OFF No Yes Yes No
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