Start-In-Gear Protection System - BOMBARDIER Johnson 90 Service Manual

ENGINE CONTROL SYSTEM
START-IN-GEAR PROTECTION SYSTEM
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.
NEUTRAL
OPERATION
SHIFT POSITION SWITCH Fuel injector lgnltlon Fuel pump Starter motor
Neutral
ON Yes Yes Yes Yes
Forward / Reverse OFF
No Yes Yes No
Battery
charge
coi!
12 V power supply
Rectifier
and
regulator
ECM
(D
Neutral switch
~ Neutral switch
@ tgnition switch
@ Starter motor
@ Starter relay
@ ECM main relay
et)
Starter magnetic switch
Battery
Reverse ~
1
e: : >
Forward
'
Neutral
3-29