Troubleshooting
Problem
Cause
Solution
Reference
Load Center Diagnostics, page 37
.
Low engine coolant level.
Inspect coolant system for leaks.
Repair as necessaryand refill
system.
Engine water temperature switch
failed or shorted out.
Check for shorts to
switch wiring. See
Electrical Schematics, page 134
.
Loose or incorrect wiring
connections.
Refer to schematics, verifywiring
connections (including grounds)
related to radiator fan. Check
Engine Harness (E), and Engine
Control Module Harness (F). See
Harness Identification, page 134
.
Blown radiator fan fuse.
Determine cause of blown fuse F3
"FAN - ATO 30A". Repair issue
then replace fuse. See
Replace
Relays and Fuses, page 64
Failed radiator fan relay.
Replace relayK4 located on
Load Center board. See
Replace
Relays and Fuses, page 64
.
Obstructed radiator fan.
Remove obstructions.
Failed radiator fan.
Replace fan. See
Replace Radiator Fan, page 67
.
Failed engine coolant temperature
sensor.
Replace engine coolant
temperature sensor located
behind radiator connected
to MCM port 5. See
Replace Engine RTD, page 90
.
Clean or replace radiator. See
Remove Radiator, page 84
.
Engine shuts down, Engine
Control Module shows High
Coolant Temperature Shutdown
icon.
Plugged radiator or coolant
system.
Contact local Perkins distributor
for service.
44
3A1706K
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