TP-5867 11/0232 Section 5 Generator/Relay Controller Troubleshooting
Engine starts
Yes
No
No voltage
Voltage present
Yes
Engine safety shutdown has
occurred: low oil pressure,
overspeed, overcrank
Check oil pressure. Check for
overspeed (governor, voltage
regulator) and overcrank conditions.
Engine fault
(check fuel
supply, spark
plug, ignition
coil, etc.)
Check for 12 volts DC
at fuel valve
No
Engine wiring harness
defective? Check
continuity of harness
leads
No
Replace
circuit
board
Yes
Replace
wiring
harness
A
Go
to B
Fault shutdown relay
LED lit?
Figure 5-2 Troubleshooting the Relay Controller Circuit Board (2 of 3)
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