Fuel Shut-Off Relay Circuit; Troubleshooting-Fuel Shut-Off Relay System; Fuel Shut-Off Relay Harness Connections - Kohler KS530 Service Manual

FUEL SHUT-OFF RELAY CIRCUIT

Some engines are equipped with a fuel shut-off relay.
This relay is part of wiring harness and is activated with
voltage supplied by equipment. Power is supplied to
fuel shut-off solenoid through a relay. By design, power
to solenoid can be interrupted by application safety
interlock circuit (seat switch/brake switch/operator
present).
If relay needs replacement, wiring harness must be
replaced.
Fuel Shut-off Relay Harness Connections
I
F
H
D
H
A Stator Assembly
Stator Leads to
C
Rectifi er-Regulator
E Ignition Kill Wire
Harness Routed
G Between Starter and
Crankcase
Fuel Shut-off Solenoid
I
Connector
22 690 01 Rev. --
E
A
B
C
D
E
F
G
B Wiring Harness
D Rectifi er-Regulator
F Fuel Shut-Off Relay
Engine to Equipment
H
6 Pin Connector
KohlerEngines.com
Troubleshooting-Fuel Shut-Off Relay System
NOTE: Refer to Fuel Shut-Off Solenoid in Fuel System
section for individual testing of solenoid valve.
Review Fuel System section for more
information.
If engine cranks but does not start, restricted fuel
delivery could be a possible cause. Confi rm fuel delivery
to carburetor.
To test fuel shut-off circuit/relay, confi rm all equipment
safety switches are in starting mode (refer to equipment
manual for detailed safety operation procedures).
1. Locate engine to equipment 6 pin connector. With
equipment switch in ON/RUN position, use
appropriate size meter probe and measure voltage
at yellow wire of 6 pin connector using a volt/ohm
meter.
Zero (0) voltage should be seen at yellow wire.
2. Remove 2 pin connector from fuel shut-off solenoid
and probe red wire terminal. Battery voltage should
be present.
If voltage is present at yellow wire of 6 pin connector,
this is an indication that engine kill wire is grounded/
equipment safety circuit has been activated through
a seat switch/PTO switch/operator present switch (if
equipped). Refer to equipment manual to identify and
determine fault. If relay of circuit is found to be at fault,
replace wiring harness (relay is not serviced separately).
Electrical System
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