Governor System
70
62 690 05 Rev. E
KohlerEngines.com
FIELD INSTALLED UPDATED DESIGN Electronic Governor Troubleshooting Flow Chart Continued
Locate Speed Control input wire. This connection is a single wire red with yellow tracer.
See illustration on page 65.
Unplug and connect a jumper wire to red wire with a yellow tracer on engine wire harness.
See illustration on page 65.
Start engine in normal manner as described in Owner’s Manual. (Engine will initially operate at speed it was
last run or shut down, then will go to idle). See illustration on page 65.
Attach open end of jumper wire to positive (+) battery terminal. See illustration on page 65.
Engine speed increases
(if it was at low speed).
Engine speed does not change.
Kohler electronic governor system tests OK. Test
control system of equipment. Refer to Equipment
Manufacturer’s diagnostic procedures for control
system.
12 Volt
Power
Test
Fail
Pass
Operation Input Voltage:
0-1 Volts at Idle/9+ Volts at High Speed.
Inspect wiring harness for broken wire or bad connections. Repair/Replace as required.
Test ground circuit to GCU. Refer to page 65.
Review GCU blink codes with chart on page 67 to identify if a system condition is present.
Proceed to Ground/Power test for GCU. Refer to page 65.
Continued on next page
