Kohler 6VSG, Service Manual, Page: 77 / 108

TP-6844 1/13 Section 5 Component Testing and Adjustment 77
Locked Rotor Shutdown
Remove the connector from the starter relay (see
Figure 5-29). Press RUN. Verify that the engine does
not turn and the controller indicates a Locked Rotor
fault.
High Engine Temperature Shutdown
Note:
Testing the high engine temperature shutdown
requires connecting a jumper wire across the
temperature sensor connections. Because the
temperature sensor can be difficult to reach, the
jumper can be placed across pins 9 and 10 on
connector P1 at the generator set controller, if
desired.
Disconnect the harness (connector P7) at the engine
temperature sensor (CTS). See Figure 5-19 for the
temperature sensor location, or see the note above.
Connect a jumper wire across the temperature sensor
connections in connector P7 or connections P1-9 and
P1-10 on the controller. See Figure 5-20. Press RUN
to start the generator set. After 5 seconds, verify that
the controller displays a high lube oil temperature fault.
If the oil temperature remains high (jumper connected)
without increasing, the generator set will run for
5 minutes in engine cooldown mode.
Press the OFF button on the controller and remove the
jumper wire. Start the generator set and verify that the
generator set does not enter the engine cooldown
cycle or shut down on a high temperature fault.
Reconnect P7 to the temperature sensor.
Figure 5-19
Figure 5-19 Temperature Sensor (CTS) Location
Figure 5-20
Figure 5-20 Temperature Sensor Connector P7
5.7.2 Fault Shutdown Switches
Check the low oil pressure and high engine
temperature shutdown switches on the engine by
performing the following tests. If the sensor does not
function as described, replace it.
Servicing the generator set when it is operating.
Exposed moving parts can cause severe injury or death.
Keep hands, feet, hair, clothing, and test leads away from
the belts and pulleys when the generator set is running.
Replace guards, screens, and covers before operating the
generator set.
Short circuits. Hazardous voltage/current can cause
severe injury or death. Short circuits can cause bodily
injury and/or equipment damage. Do not contact electrical
connections with tools or jewelry while making adjustments
or repairs. Remove all jewelry before servicing the
equipment.
Temperature Sensor (CTS)
The temperature sensor (labeled CTS on the wiring
diagram and schematic drawing) is used to monitor
engine temperature for the high engine temperature
fault shutdown. See Figure 5-19 for the temperature
sensor location. Press the OFF button on the
controller to stop the generator set and allow the
generator set to cool. Disconnect the temperature
sensor (or see the following note) and use an
ohmmeter to measure the resistance across the
sensor. The sensor resistance varies with temperature
and should be within the values shown in Figure 5-21.
1
KPS_087
GM66561
1. Temperature sensor
WARNING
!
Hazardous voltage. Moving parts.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
are in place.
KPS_088
GM81217