Kohler 5EOZ Manual page 54

To further check the generator set components,
disconnect the battery and remove the wiring harness
plugs from the controller circuit board.
ohmmeter to check the continuity of the components
and to isolate inoperative components.
Figure 8-2 and Figure 8-3.
Component
Start/stop switch
K20 relay coil and wiring Connect the ohmmeter to the
Starter solenoid
(S relay)
Controller 10-amp
circuit breaker and
wiring
Figure 8-2 Engine/Generator Component Testing, Relay Controller
42 Section 8 Component Troubleshooting
Use an
Refer to
Ohmmeter Connections
Connect the ohmmeter to the
P2-6 and P2-4 leads.
Connect the ohmmeter to the
P2-6 and P2-5 leads.
P1-4 and P1-9 leads.
Connect the ohmmeter to the
P4-22 lead and the battery
positive (+) cable. Note: The
J4 and P4 leads must be
disconnected to perform this
test.
Connect the ohmmeter to the
battery positive (+) cable and
the P1-14 lead. Note: The J4
and P4 leads must be
connected to perform this test.
Note: Before performing ohmmeter checks, disconnect
the generator set battery to prevent damage to
the ohmmeter.
Procedure
Place the ohmmeter on the
R x 1000 scale. Place the
rocker switch in the START
position.
Place the ohmmeter on the
R x 1000 scale. Place the
rocker switch in the STOP
position.
Place the ohmmeter on the
R x 1 scale.
Place the ohmmeter on the
R x 1 scale.
Place the ohmmeter on the
R x 1000 scale.
Results
If the switch is functional, zero
ohms continuity. Any
resistance other than zero or
very low ohms, replace the
switch.
If the switch is functional, zero
ohms continuity. Any
resistance other than zero or
very low ohms, replace the
switch.
If functional, 85 ohms. Low
resistance, shorted C relay
coil and/or wiring. High
resistance, open C relay
and/or wiring. Replace the
controller board.
If functional, approximately
0.5--0.6 ohms at 27°C (80°F).
If functional, zero or very low
ohms. No reading (infinity),
open circuit or circuit breaker
tripped.
TP-6053 7/04