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Service Manual – SC8000
n ine Start an un Circuit escri tion
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pedal is in the neutral position.
Circuit escri tion
For the engine to start:
The
Key Switch S1
must provide positive voltage to the
START
relay coil
K3
and the
IGN
relay coil
K2
.
The
K2 RELA CONTROL SWITCH
must be closed to provide a ground to the
IGN
relay coil
K2
. This closes
the
K2
relay contacts to provide positive voltage to the
IGN SW INPUT
. Note that if the
Driver Box
sends
a
RUN INHIBIT
signal from
J1-34
to the
K2 RELA CONTROL SWITCH
to open the switch, no ground will
be provided to the
IGN
relay coil
K2
, the
K2
contacts will not close and no positive voltage will be sent to
the
IGN SW INPUT
.
The
K3 RELA CONTROL SWITCH
must be closed to provide a ground to the
START
relay coil
K3
. This
closes the
K3
relay contacts to provide positive voltage to the
START COMMAND TO STARTER RELA
.
DRIVE
BOX
PIN J1-22
PIN J1-34
PIN J1-10
PIN J1-31
PIN J1-11
Battery (+) From
F1 Fuse 100A & CB6 15A
S1
K2
K3
R1
START
B1
IGN
J7-6
J7-3
J7-7
J7-8
START INHIBIT
RUN INHIBIT
J7-4
J7-2
J7-5
K2
K3
DRIVE PEDAL SENSOR
BAT -
BAT -
3
J7-1
RELAY
PCB
START COM-
MAND TO
STARTER RELAY
IGN. SW INPUT
ALT. EXCITE
1
2
3
ENGINE START/RUN RELAY PCB J7
Requirements:
1. First turn the S1 Key Switch to “Start” position, then released to it’s “Run” position.
2. Foot pedal in Neutral.
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