ARMY TM 9-6115-671-14
AIR FORCE TO 35C2-3-446-32
MARINE CORPS TM 09249A/09246A-14
4-42
TABLE 4-4. UNIT TROUBLESHOOTING (CONTINUED)
OK
Not OK
FAULT INDICATOR DISPLAYS CIRCUIT
FAILURE - COOLANT TEMP
FAULT INDICATOR displays
CIRCUIT FAILURE - COOLANT
TEMP.
Test coolant temperature
electrical circuit for breaks
or loose connectors.
Schematic, FO-1.
Repair or replace wires or
connectors. Refer to Wiring
Diagram, FO-3. Hold FAULT
RESET switch in ON position for
2 seconds to clear fault.
Did Fault clear?
Not OK
Test coolant
temperature sender
(see para. 4.13.2).
OK
Not OK
Check for breaks or loose
connections in Fault Reset
switch circuit. Refer to
Schematic, FO-1.
Replace coolant
temperature sender
(see para. 4.13.2).
Check Ribbon
cables for breaks
or damage.
OK
Not OK
Test Fault Reset
switch (12, Fig 2-1)
Ref Para. 4.8.8.
Replace Fault Reset
switch (12, Fig 2-1)
Ref Para. 4.8.8.
Not OK
Is HEARTBEAT
LED on I/O
interface module
(see para. 4.8.25)
blinking?
OK
Replace I/O
interface module
(see para. 4.8.25).
Not OK
OK
Replace damaged or
defective ribbon cable.
Not OK
Test Backplane.
Ref Para.
4.8.24.
OK
Replace Backplane
Ref Para. 4.8.24.
Notify next higher
level of
maintenance.
Not OK
OK
OK
