Gcu Blink Code Tests - Kohler Command Pro ECV850 Service Manual

Governor System

GCU Blink Code Tests

A
B
A Green LED Light
GCU Blink Codes for Software Stored Codes - Activated when key is turned to ON position.
Failure Condition
Speed Error
Watchdog Interrupt RFI interference
Overtemp
Software bug
Lightning
Overspeed (Over External noise on ECU input
4500 RPM for 0.5
Frozen throttle plate
seconds sustained)
DLA failure
Mechanical bindage
Excessive Battery Open battery voltage on B+
Voltage (> 18v for 24 V battery (not compatible
0.5 seconds) with system, 12 V battery only)
52
B Yellow LED Light
Possible Causes
KohlerEngines.com
Speed control issues can also be diagnosed utilizing
on-board Blink Code diagnostic lights equipped in GCU.
These GCUs store blink codes/trouble codes, that can
be quickly diagnosed using blink code charts.
Response
Response
Ground to kill,
close throttle plate
Ground to kill, 1 second
close throttle plate delay
Ground to kill, 0.5
close throttle plate seconds
LED Diagnostics
Time
Yellow LED Green LED
BLINKS ON
BLINKS BLINKS
ON ON
OFF ON
19 690 01 Rev. --