Kohler 8.5RES Service page 99

To further check generator set components, disconnect
the battery and remove wiring harness plugs from the
controller circuit board. Use an ohmmeter to check the
continuity of the components listed in Figure 6-45. Also
see Section 8, Wiring Diagrams.
Figure 6-45 gives resistance readings for functional
components. A zero reading on the ohmmeter indicates
continuity. No ohmmeter reading indicates very high
resistance or an open circuit. A measurement that
varies significantly from the value shown in the table
indicates a
components.
Note: Disconnect the generator set battery before
performing continuity checks to prevent damage
to the ohmmeter.
Component
Generator set
master switch
P1 wiring
harness
Controller fuse
and wiring
Auxiliary winding
fuse 20 amp fuse
Low oil pressure
(LOP) switch *
Temperature
sensor (CTS) *
* See Section 6.11.2, Fault Shutdown Switches
Figure 6-45 Continuity Checks
TP-6196 10/09
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faulty component; replace
Ohmmeter
Connections
RUN and VBAT (see
Figure 6-44)
AUTO and VBAT
(see Figure 6-44)
P1-27 and ground
P15-1 and P15-3
(stator leads 11 and 44)
P16-3 and P16-6 (stator
leads 55 and 66)
P1-24 and battery
positive (+)
P16-3 and stator lead 55 R x 100
Lead 13 and ground
(engine block)
P1-8 and P1-9
manuals search engine
Master Switch in
RUN Position
faulty
Master Switch in
AUTO Position
Figure 6-44 Generator Set Master Switch Continuity
Generator Set
Ohmmeter Master Switch
Scale
Position
R x 100 RUN
OFF/RESET
R x 100 AUTO
OFF/RESET
R x 1 OFF/RESET
R x 1 OFF/RESET
R x 1 OFF/RESET
R x 100 OFF/RESET
OFF/RESET
R x 100 OFF/RESET
R x 1000 OFF/RESET
Zero ohms (continuity) across
RUN and COM terminals
Zero ohms (continuity) across
COM and AUTO terminals
Checks
Ohmmeter Readings for
Operative Components*
Zero ohms (continuity). Any other reading
indicates a bad switch.
No reading (open circuit). Any other reading
indicates a bad switch.
Zero ohms (continuity). Any other reading
indicates a bad switch.
No reading (open circuit). Any other reading
indicates a bad switch.
Zero ohms (continuity). Any other reading
indicates a poor ground connection.
Zero ohms (continuity). If no continuity,
check wiring.
Zero ohms (continuity). If no continuity,
check fuse F1 and wiring.
Zero ohms (continuity). If no continuity is
found, check fuse F3 and wiring.
Zero ohms (continuity). If no continuity is
found, check for an open circuit and/or a
blown fuse.
Zero ohms (continuity). No continuity
indicates a bad switch and/or wiring.
180--2500 ohms, depending on engine
temperature. Zero ohms or an open circuit
indicates bad wiring or a bad switch.
Section 6 Component Testing and Adjustment 99