Start-In-Gear Protection System - Suzuki DF 90 Service Manual

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
Forward / Reverse
Battery
charge
coil
Rectifier &
regulator
30A Fuse
60A fuse
OFF
ON
START
Remo-con box
Battery
NEUTRAL
SWITCH
Fuel injector
ON Yes
OFF No
12V power supply
ECM
Neutral switch
Neutral switch
Ignition switch
Starter motor
Starter relay
ECM main relay
Starter magnetic switch
ENGINE CONTROL SYSTEM
OPERATION
Ignition Fuel pump
Yes Yes
Yes Yes
3-33
Starter motor
Yes
No