TP-6053 7/04 29Section 6 Controller Troubleshooting
Do the local and remote
start/stop switches
function correctly?
Does the engine start?
Yes
No
Is 12 volts DC
present at the
fuel solenoid?
(check wiring)?
Yes
No
Isthe10-ampfuseokay?
Is the K4 relay LED lit?Yes No
Engine fault: check the fuel
supply, fuel feed pump, fuel
injection pump, etc.
Yes
Replace the circuit board
(inoperative K4 relay).
No
Replace the inoperative
start/stop switch.
A
No
Replace
the fuse.
Yes
Is the K25 relay functioning
correctly?
No
Replace
the K25
relay.
Yes
S Check the P1--8 connection.
S Check the P4--14 connection.
S Replace the circuit board
(the K2 relay is inoperative).
Go to B
(next page).
Figure 6-5 Troubleshooting Relay Controller Circuit Board (2 of 4)
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