Suzuki GF60A, Service Manual

Page: 93 / 336

Engine Electrical Devices: 1C-6
ECM Power Source Line
ZAJ6111301002
The ECM is battery dependent and must be provided
with its own dedicated 12 V power supply. The electrical
circuits which provide this supply are:
1. When the ignition switch is turned “ON”, battery
power passes from the white lead wire, through the
ignition switch contacts to the gray output lead wire
to the No. 15 and 36 terminals of the ECM.
NOTE
Ensure that the battery cable connections are
clean and secure.
A failure at the battery connection will cause
incorrect operation of the ECM and starter
motor cranking system.
2. When the ECM main relay is energized, by turning
the ignition switch “ON”, battery voltage is supplied
to the No. 12 terminal of the ECM.
Main Harness Capacitor
This capacitor stabilizes the voltage in the engine control
system circuit.
• If a “short” occurs in this circuit, the ECM (30 amp.)
fuse will blow causing the engine control system to be
inoperative.
• If an “open” occurs in this circuit, the cranking system
will not function.
Emergency Stop Switch
When the cord from the plate of the switch is secured to
the operator, the plate will be pulled off if the operator is
suddenly thrown overboard.
The circuit of emergency stop switch will be closed when
the plate is removed.
Then the ECM does not provide fuel injector operating
signal, ignition signal, fuel pump operating signal and
starter motor relay operating signal.
Failure symptoms:
A switch short circuit will not allow the motor to start.
1. Starter motor 4. 30 amp. fuse
2. Battery cable 5. ECM main relay
3. 30 amp. fuse 6. Battery
BATT
ECM
IG
GND
12
36
Gr
W
W
R
W
B
Gr
B
Gr
B/Bl
B/G 15
W
35 R/B
1
2
3
5
6
4
IAJ611130003-03
1. Main harness capacitor
1. Emergency stop switch
1
IAJ611130014-01
1
1
IAJ611130015-01