Owner`s manual

87
Bulletins, Etc.
7
Test 1: Identify the following wire ends in the plug.
Using a digital multi-meter set to the lowest scale
(0-200 ohms) place the probes onto the harness
making sure of a good connection. Resistance should
be between 47.7 and 58.3 ohms. See Figure 10.
If either test fails the DLA is no good and should be
replaced. If both test are good the DLA is neither
shorted or open, and should be good. An another
component, connection or input is most likely at fault.
GCU Circuit Test
Remove the GCU and unplug the
wiring harness. See Figures 6 and 7.
Test 2: Identify the following wire ends in the plug.
Using a digital multi-meter set to the lowest scale
(0-200 ohms) place the probes onto the harness
making sure of a good connection. Resistance should
be between 47.7 and 58.3 ohms. See Figure 11.
Test supply voltage to GCU using
volt meter. Refer to Figure 9
(battery voltage +/- 1 volt)
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 Figure 8
Locate the Speed Control input wire. The connection is either a single wire red w/yellow
tracer, or a 6 pin connector body with a red wire w/yellow tracer. See Figures 16 or 17.
Unplug and connect a jumper wire to the red wire
with a yellow tracer on the engine wire harness.
Start the engine in the normal manner as described in the Owner’s Manual.
(Engine will initially operate at speed it was last run or shut down)
Attach open end of jumper wire to the positive (+) battery terminal.
Engine speed increases
(if it was at low speed)
Engine speed does not change.
The Kohler electronic governor system tests OK.
Test the control system of the equipment. Refer
to the Equipment Manufacturer’s diagnostic
procedures for the control system.
Proceed to Ground/Power and OHMs test for GCU
12 Volt
“Power
Test”
Probe red w/yellow wire
on 6 pin connector.
or
Fail
Pass
Proceed to DLA Circuit Test
Operation Input Voltage:
0 Volts at Idle / 12 Volts at High Speed
Kohler Electronic Governor Troubleshooting Chart (Continued)