Nissan Frontier D40. Manual - part 741
INSUFFICIENT HEATING
HAC-67
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
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INSUFFICIENT HEATING
Component Function Check
INFOID:0000000005275906
SYMPTOM: Insufficient heating
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE
1.
Rotate blower control dial clockwise.
2.
Turn the temperature control dial clockwise to maximum heat.
3.
Check for hot air at discharge air outlets.
Can the symptom be duplicated?
YES
>> GO TO 2.
NO
>> Perform complete operational check. Refer to
.
2.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis. Refer to
HAC-17, "Front Air Control Self-Diagnosis"
Is the inspection results normal?
YES
>> GO TO 4.
NO
>> Refer to
HAC-58, "Symptom Matrix Chart"
.
4.
CHECK ENGINE COOLING SYSTEM
1.
Check for proper engine coolant level. Refer to
(VQ40DE).
2.
Check hoses for leaks or kinks.
3.
Check radiator cap. Refer to
(VQ40DE).
4.
Check for air in cooling system.
>> GO TO 5.
5.
CHECK AIR MIX DOOR OPERATION
Check the operation of the air mix door.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Check the air mix door motor circuit. Refer to
HAC-25, "Air Mix Door Motor Component Function
.
6.
CHECK AIR DUCTS
Check for disconnected or leaking air ducts.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair all disconnected or leaking air ducts.
7.
CHECK HEATER HOSE TEMPERATURES
1.
Start engine and warm it up to normal operating temperature.
2.
Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be
warm.
Is the inspection result normal?
YES
>> Hot inlet hose and a warm outlet hose: GO TO 8.
NO
>> Both hoses warm: GO TO 9.