Coolant Temperature Below Normal
Cause Corrections
----------
* Electronic Fault Codes Active -
Coolant Temperature Sensor
OK
f
Refer to the N14 CELECT™ System
Troubleshooting and Repair Manual,
Bulletin No. 3810469.
----------
Continuously Operating in Low Ambi-
ent Temperature
OK
f
Refer to Cold Weather Operation,
Bulletin No. 3387266-R.
----------
Radiator Shutters Stuck in Open
Position or Opening Early
OK
f
Check shutter operation. Repair or
replace if necessary. Refer to Procedure
1-17.
----------
Temperature Gauge and/or Sensor
Malfunctioning
OK
f
Test the gauge and sensor. Repair or
replace if necessary. Refer to Procedure
1-13.
----------
ON-OFF Fan Clutch Operates Continuously
OK
f
Check on-off fan drive. Refer to Proce-
dure 1-24.
----------
Viscous Fan Drive Operates Continuously
OK
f
Check viscous fan drive. Refer to
Procedure 1-23.
----------
Perform Cooling System Test. Refer to
CompuchekT Test Procedures Manual,
Bulletin No. 3810485. Check For The
Following Two Causes
OK
f
Refer to CompuchekT Test Procedures
Manual, Bulletin No. 3810485.
----------
Thermostat Seal Damaged, Missing, or
Incorrectly Located. Thermostat Incorrect
or Malfunctioning
Check thermostat seal/seat and thermo-
stat. Replace if necessary. Refer to
Procedures 1-31 and 1-32.
Troubleshooting Symptoms Charts SectionT-Troubleshooting
N14Page T-20
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