TP-6071 3/00 25Section 6 Controller Troubleshooting
Check the local and
remote start/stop
switches.
Does the engine start?
Yes
No
Engine fault (check the fuel
supply, fuel feed pump, bleed
fuel system, etc.).
B
Go to C
(next page).
Is voltage present at the fuel
solenoid (P4--14 and P) (check
wiring and connectors)?
Is the 10 amp (F2)
fuse functional?
No
Yes
Is the K25 relay functioning
properly?
No Yes
Replace the
K25 relay.
Is the P4-14 connection making
contact?
Yes
-Check for inoperative relays
-Check the ground paths to the relays
-Check wiring for opens
Yes
No
Clean or replace the
connector.
Figure 6-6 Troubleshooting Relay Controller Circuit Board (2 of 5)
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