Nissan Pathfinder. Instruction - part 722
INSUFFICIENT HEATING
HAC-149
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
INSUFFICIENT HEATING
FRONT AIR CONDITIONER
FRONT AIR CONDITIONER : Description
INFOID:0000000009176887
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
FRONT AIR CONDITIONER : Diagnosis Procedure
INFOID:0000000009176888
NOTE:
Perform self-diagnoses with on board diagnosis and CONSULT before performing symptom diagnosis. If DTC
is detected, perform the corresponding diagnosis.
1.
CHECK COOLING SYSTEM
1. Check engine coolant level and check leakage. Refer to
.
2. Check reservoir tank cap. Refer to
3. Check water flow sounds of the engine coolant. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Refill engine coolant and repair or replace parts depending on the inspection results.
2.
CHECK HEATER HOSE
Check installation of heater hose visually or by touching.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace parts depending on the inspection results.
3.
CHECK HEATER CORE
1. Check temperature of inlet hose and outlet hose of front heater core.
2. Check that inlet side of heater core is hot and the outlet side is slightly lower than/almost equal to the inlet
side.
CAUTION:
Always perform the temperature inspection in a short period of time because the engine coolant
temperature is very hot.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace heater core. Refer to
HA-44, "HEATER CORE : Removal and Installation"
4.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of front air conditioning system for air leakage.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace parts depending on the inspection results.
5.
CHECK SETTING OF TEMPERATURE SETTING TRIMMER (FRONT)
1. Check setting value of temperature setting trimmer (front). Refer to
CONDITIONING SYSTEM : Temperature Setting Trimmer (Front)"
2. Check that temperature setting trimmer (front) is set to “
− direction”.
NOTE:
The control temperature can be set by the temperature setting trimmer (front).
3. Set difference between the set temperature and control temperature to “0”.
Are the symptoms solved?
YES
>> Inspection End.
NO
>> Replace A/C auto amp. Refer to
HAC-157, "Removal and Installation"
.
REAR AIR CONDITIONER