Governor System
10962 690 05 Rev. H KohlerEngines.com
On new updated design engines, E-Gov Jumper Test Tool (refer to Tools and Aids) is
recommended to perform 12 volt power test.
Using a jumper wire, supply 12 volt (+) to red wire w/yellow tracer bullet connector on
E-Gov Jumper Test Tool. Engine RPM should increase to high speed (approx. 3600 RPM).
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 102.
Review GCU blink codes with chart on page 106 to identify if a system condition is
present.
Proceed to Ground/Power test for GCU. Refer to page 102.
NEW UPDATED DESIGN Electronic Governor Troubleshooting Flow Chart Continued
If test fails, DLA is no good and should be replaced. If test is good, another component, connection, or input is
most likely at fault.
DLA function can be tested and confi rmed using a stepper motor controller tool. Refer to Tools and Aids.
Testing instructions are included with tool.
Turn key switch to ON position. Test supply voltage to GCU using volt meter. Refer to page 102.
(Battery voltage +/- 1 volt)
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