Kohler 40COZ/33CFOZ Service Manual page 67

1 2
9 8
1. LED1
2. K1 relay (fault)
3. K3 relay (crank/run)
4. LED3
5. LED4
Figure 6-9 Relay Controller Circuit Board E-254717
(COZ/CFOZ Models)
6.2.1 Relay Controller Flowchart
Move the Does the
generator engine crank?
set master
switch to
the RUN
position
Is the K2 relay
No
LED2 lit?
Is the 10-amp
No
fuse functioning?
Yes
D Check the condition/
connections of the
start/stop switch
(N, 4, and 47). See
Wiring Diagrams
D Check the battery
condition and
connections
Do the above items
check out okay?
TP-5737 5/01
3 4
E-254717-A
7 6 5
6. K4 relay (crank)
7. P1 connector
8. K2 relay (run)
9. LED2
Yes
No
Is the K4 relay
Yes
LED4 lit?
Replace
the fuse
The K2 or K4 relay is
inoperative. Replace
the circuit board
Is diode D5
Yes
open?
No
The K2 relay is
faulty—replace
the board
Repair/replace
No
the components
1 2
11 10 9
1. K5 relay (fault latch)
2. K1 relay (fault)
3. K3 relay (crank/run)
4. LED3
5. LED4
6. K4 relay (crank)
Figure 6-10 Relay Controller Circuit Board F-254717
(EOZ/EFOZ Models)
Verify that the K4 relay
voltage at the K20
relay coil when the
start switch is in the
Yes
voltage present at the
No
The K4 relay is
faulty—replace
Replace
Yes
board
D Check the starter and K20
relay. See Wiring
Diagrams and the engine
service manual
D Check battery(ies). Load
test the battery(ies)
Section 6 Decision-Makert 1 Controller Troubleshooting
3
8 7
7. P1 connector
8. K2 relay (run)
9. LED2
10. LED1
11. LED5
is energized by
checking for DC
RUN position. Is
K20 relay?
Is voltage present
at the starter
No
No
the circuit
board
Replace
the K20
relay
Check battery(ies).
Load test battery(ies).
Repair/replace the
starter motor. See
the engine service
manual.
4
F-254717-
6 5
Go to
A
Yes
motor?
Yes
53