Kohler ECV940 Service Manual page 51

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 47.
12 Volt
Power
Test
Unplug and connect a jumper wire to red wire with a yellow tracer on engine wire harness.
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).
Attach open end of jumper wire to positive (+) battery terminal.
Engine speed increases
(if it was at low speed).
Fail
Engine speed does not change.
Review GCU blink codes with chart on page 49 to identify if a system condition is present.
Proceed to Ground/Power and OHMs test for GCU. Refer to page 46.
Remove GCU and unplug wiring harness. See illustration on page 45.
GCU Circuit Test.
Inspect wiring harness for broken wire or bad connections. (Repair/Replace as required).
Test supply ground circuit to GCU using a continuity OHM/tester. Refer to page 46.
Continued on next page
62 690 05 Rev. --
Operation Input Voltage:
0-1 Volts at Idle/9+ Volts at High Speed.
Kohler electronic governor system tests OK. Test
Pass
control system of equipment. Refer to Equipment
Manufacturer's diagnostic procedures for control
system.
KohlerEngines.com
Governor System
51