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HEATER FAILS TO SUFFICIENTLY WARM ENGINE (COOLANT PUMP OPERATING) (MODEL A).
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TM-9-2320-279-20-1 5-Ton 6x6 M39 Series Trucks (Multifuel) Manual
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ARCTIC HEATER FAULT CODE RETRIEVAL DEVICE (FCRD) OPERATION (MODEL B)-continued - TM-9-2320-279-20-10397
TM 9-2320-279-20-1
Troubleshooting Malfunctions (Cont)
2-15. TROUBLESHOOTING INSTRUCTIONS (CONT).
Table 2-9.
Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ARCTIC HEATER KIT (CONT)
5. CIRCUIT BREAKER OPENS (MODEL A).
Step 1.
Check arctic heater kit installation for damaged or loose wiring. Remove heater
compartment cover (para 20-2).
Tighten loose connections, repair or replace damaged wiring.
Step 2.
Check for defective arctic heater starter cable. Test resistance between each end of cable
wires.
If any wire tested shows more than zero ohms, replace cable.
Step 3.
Replace circuit breaker No. 4 (para 7-43). Restart arctic heater.
If circuit breaker opens, replace arctic heater.
Step 4.
If problem has not been solved, notify the supervisor.
6. ARCTIC HEATER FAULT CODE RETRIEVAL DEVICE (FCRD) OPERATION (MODEL B).
a. Introduction.
The Fault Code Retrieval Device (FCRD) is used to troubleshoot and isolate component
failures in the arctic heater (Model B) system.
The Fault Code Retrieval Device (FCRD) reads, displays, and deletes fault codes stored in
the arctic engine heater control unit. The FCRD saves up to 5 fault codes, stored in the
arctic engine heater electronic control unit memory, labeled F1 to F5. The latest fault code
recorded is labeled F1.
The current or present fault code is labeled "AF" and is always stored in the F1 memory
location. Previous fault codes are transferred to memory locations F2 to F5.
Refer to MALFUNCTION 9, ARCTIC HEATER DIAGNOSTIC TROUBLESHOOTING to
troubleshoot diagnostic codes for the arctic heater (Model B).
Change 7

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