TP-6073 4/06 35Section 6 Controller Troubleshooting
Replenish fuel supply.
Does the engine start?
Yes
No
Is 12-volt DC
present at
the fuel
solenoid?
(check wiring)
Yes
No
Is the 10-amp fuse
(BCA) functional?
Does unit have fuel?
No
Yes
Engine fault (check the fuel
supply, fuel feed pump, fuel
injection pump, etc.).
No
Replace
the fuse.
Yes
Is the K25 relay functional?
No
Replace
the K25
relay.
Yes
S Check P1--8 connection
S Check P4--14 connection
S Replace the circuit board
(inoperative K2 relay).
Go to
C
A
Figure 6-4 Troubleshooting the Relay Controller Circuit Board (2 of 4)
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