Test 2 Probe Location; Ohms Tests; Speed Control Input - Kohler Command Pro ECV850 Service Manual

Test 2 Probe Location

A Probe Location for Voltage Test 2.
Test 2: Identify probe location in connector. Using a
12 volt meter test for voltage. Turn key switch to ON
position. Voltage should be within +/- 1 volt of battery
voltage. If voltage is within +/- 1 volt of battery voltage,
harness is OK, replace GCU. If not within +/- 1 volt of
battery voltage, check connections and replace wiring
harness if necessary.

Ohms Tests

1. Remove GCU from bracket and unplug wiring
harness.
These two tests are for measuring resistance of DLA
circuit that sends a signal to GCU. If either test fails,
DLA is no good and should be replaced. If both tests are
good, DLA is neither shorted or open, it is good. Another
component, connection, or input is most likely at fault.
Test 1 Probe Location
A Probe Locations for OHMs Test 1.
Test 1: Identify probe locations in connector. Using a
digital multi-meter set to lowest scale (0-200 ohms),
place probes onto harness making sure of a good
connection. Resistance should be between 47.7 and
58.3 ohms.
If test 1 checks OK, locate wire ends in connector and
check using test 2.
19 690 01 Rev. --
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KohlerEngines.com
Test 2 Probe Location
A Probe Locations for OHMs Test 2.
Test 2: Identify probe locations in connector. Using a
digital multi-meter set to lowest scale (0-200 ohms),
place probes onto harness making sure of a good
connection. Resistance should be between 47.7 and
58.3 ohms.
If either test 1 or 2 fail resistance test, fault could also
be caused by a break/cut in wiring harness. Inspect and
test for a potential harness issue prior to replacing DLA
assembly.

Speed Control Input

A Red Wire with Yellow Tracer.
This connection is a single wire red with yellow tracer.
Governor System
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