Kohler Command Pro ECV850 Service Manual page 56

Governor System
Electronic Governor Troubleshooting Flow Chart Continued
Turn key switch to ON position. Test supply voltage to GCU using volt meter. Refer to page 50 (battery
voltage +/- 1 volt) Note: Prevent Damage to Connector. Do Not Use Oversized Probe Tips.
Test 1: Identify wire ends 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.
Refer to page 51.
Test 2: Identify wire ends 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.
Refer to page 51.
If either test fails, DLA is no good and should be replaced. If both tests are good, DLA is neither shorted or open,
and should be good. Another component, connection, or input is most likely at fault.
Basic Electrical Diagram of Electronic Governor System
B+
10 Power
8
12
13
Application Supplied
Speed Control Input
Operation Input Voltage:
0-1 Volts at Idle/9+ Volts at High Speed
56
Proceed to DLA Circuit Test.
Green LED Light
Device
Yellow LED Light
Ground
KohlerEngines.com
Speed Signal 14
*
*
1
DLA Driver
2
Controls
6
7
ECU Speed Output
(speed signal)
ECU
2B
2A
1A
1B
DLA
19 690 01 Rev. --