4–7 T-361
4.5 ELECTRONIC GOVERNOR MODULE
4.6 VOLTAGE CONTROLLER
The voltage controller has one green indicator light and one yellow indicator light. When the green light is illumi-
nated, it means that the voltage controller is receiving power. The yellow light only illuminates (flashes) to indicate
that there is a problem.
Table 4–10 Electronic Governor Modules
Fault LED flash code Possible Cause
Engine Over Speed: more than
2,530 RPM
One Long - One Short ESS or mechanical engine problem
Actuator Wiring Disconnection.
No signal from ESS for 2
seconds after RPM is greater
than 1,000 RPM for 10
seconds, OR for 5 seconds
while engine cranking (no
voltage at EG pin 18).
Two Long - One Short Short ESS or wiring problem
Speed Sensor Disconnection.
Fuel/speed actuator (FS)
wiring disconnected or open
circuit. Coil Resistance Spec:
2.8 ohm +
10%.
Two Long - Three Short FS or wiring problem
EG supply voltage is greater
than 26V.
Two Long - Seven Short EG or alternator problem
Table 4–11 Voltage Controller
Green LED Fault Possible Cause/Remedy
LED not illuminated No power to the voltage controller Contactor failed
Check line side power on
contactors
Yellow LED flash Code Fault Possible Cause/Remedy
One Long - Three Short Over Voltage Error Engine speed, check
One Long - Four Short Under Voltage Error Engine speed, check
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