Kohler 40COZ/33CFOZ Service Manual page 68

Does the
A
engine start?
No
Does the engine
crank for 30
seconds and
then shut down?
No
Is 12-volts DC
present at the
No
fuel solenoid?
See the Wiring
Diagrams
Yes
Engine mechanical
problem. See the
engine service
manual. Check the
following
components:
D Fuel supply
D Fuel solenoid
D Compression
54 Section 6 Decision-Makert 1 Controller Troubleshooting
Unit shuts down on overcrank.
Yes
Troubleshoot the engine using the
engine service manual
Is the Is the K1
Yes
15-amp relay LED1
fuse okay?
No
Unit starts but
Replace
then shuts down
the fuse
If shutdown is
immediate, check occurs after 30
the overspeed circuit seconds, check
If shutdown occurs
after 5--7 seconds,
check the low oil
pressure, high
engine temperature,
or high exhaust
temperature circuits
Yes
Is the K2
No
relay
lit? energized?
Yes
Yes
Is the K10 (with
F-254717) or K5 (with
E-254717) relay
energized?
If shutdown
Yes
the overcrank
circuit
Check the
wiring between
TB1 terminal 70
and the fuel
solenoid
Check for 12-volts
DC at 70. Check
No
the engine wiring
harness
connections from
the control board
to the component.
Check the
continuity of the
harness leads.
Does the engine
wiring harness
checkout okay?
No
Yes
Replace
the K10
or K5 Replace Repair/
relay
the replace
circuit
board wiring
harness
Go to
B
No
the
TP-5737 5/01