HEATER AND AIR CONDITIONING SYSTEM CONTROL SYMPTOMS
Symptom Table
INSUFFICIENT COOLING
Component Function Check
Symptom: insufficient cooling
Inspection flow
1. Confirm symptom by performing operation check - temperature decrease
Can a symptom be duplicated? YES >> GO TO 3 NO >> GO TO 2
2. Check for any symptoms
Perform a complete operational check and check for any symptoms. Refer to HAC-157, "Work Procedure".
Does another symptom exist? YES >> Refer to HAC-181, "Symptom Table".
NO >> System OK.
3. Check for service bulletins
Check for any service bulletins.
>> GO TO 4
4. Check drive belts
Check a/c compressor belt tension. Refer to em-16, "inspection".
Is the inspection result normal? Yes >> go to 5 no >> adjust or replace compressor belt. Refer to em-16, "adjustment".
5. Check air mix door motor operation
Check and verify air mix door mechanism for smooth operation.
Does air mix door operate correctly? Yes >> go to 6 no >> check air mix door motor circuit. Refer to hac-163, "diagnosis procedure".
6. Check cooling fan motor operation
Check and verify cooling fan motor for smooth operation.
Does cooling fan motor operation correctly? Yes >> go to 7 no >> check cooling fan motor. Refer to ec-463, "component function check".
7. Check recovery/recycling equipment before usage
Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/ recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.
>> GO TO 8
8. Check refrigerant purity
Is the inspection result normal? Yes >> go to 9 no >> check contaminated refrigerant. Refer to ha-21, "description".
9. Check refrigerant pressure
Check refrigerant pressure with manifold gauge connected. Refer to ha-28, "inspection".
Is the inspection result normal? Yes >> perform diagnostic work flow. Refer to ha-15, "workflow".
No >> go to 10
10. Check for evaporator freeze up
Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up? YES >> Perform diagnostic work flow. Refer HA-15, "Workflow".
NO >> GO TO 11
11. Check air ducts
Check ducts for air leaks.
Is the inspection result normal? Yes >> system ok.
No >> repair air leaks.
INSUFFICIENT HEATING
Component Function Check
Symptom: insufficient heating
INspection flow
1. Confirm symptom by performing operation check - temperature increase
Can a symptom be duplicated? Yes >> go to 3
NO >> GO TO 2
2. Check for any symptoms
Perform a complete operational check and check for any symptoms. Refer to hac-157, "work procedure".
Does another symptom exist? Yes >> refer to hac-181, "symptom table".
No >> system ok.
3. Check for service bulletins
Check for any service bulletins.
>> Go to 4
4. Check engine cooling system
>> Go to 5
5. Check air mix door motor operation
Check and verify air mix door mechanism for smooth operation.
Does air mix door operate correctly? Yes >> go to 6
No >> check the air mix door motor circuit. Refer to hac-163, "diagnosis procedure".
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
Is the inspection result normal? YES >> GO TO 8
No >> both hoses warm: go to 9
8. Check engine coolant system
Check thermostat operation. Refer to co-23, "inspection".
Is the inspection result normal?
Yes >> system ok.
No >> repair or replace as necessary.
9. Check heater hoses
Check heater hoses for proper installation.
Is the inspection result normal? Yes >> system ok.
No >>
10. Check heater hose temperatures
Is the inspection result normal? YES >> System OK.
NO >> Replace heater core. Refer to HA-44, "HEATER CORE : Removal and Installation".
COMPRESSOR DOES NOT OPERATE
Description
Symptom: compressor does not operate
Diagnosis Procedur
e
Note:
1.Check magnet clutch operation
Check magnet clutch. Refer to hac-178, "component function check".
Does it operate normally? Yes >> go to 2.
No >> repair or replace malfunctioning parts.
2.Check refrigerant pressure sensor
Check refrigerant pressure sensor. Refer to EC-465, "Component Function Check".
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace malfunctioning parts.
3.Check front air control output signal
With consult
Check “fan on” and “” in “data monitor” mode of “” using consult.
Is the inspection result normal? Yes >> go to 4.
No >> replace a/c switch assembly. Refer to hac-188, "removal and installation".
4.Check ecm input signal
With consult
Check “air cond sig” and “heater fan sw” in “data monitor” mode of “ecm” using consult.
Is the inspection result normal? Yes >> go to 5.
No >> check can communication system. Refer to lan-16, "trouble diagnosis flow chart".
5.Check ipdm E/R input signal
With consult
Is the inspection result normal? YES >> Inspection End.
NO >> Check CAN communication system. Refer to LAN-16, "Trouble Diagnosis Flow Chart".
Precaution
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injur ...
Precautions for Suspension
When installing rubber bushings, the final tightening must be carried
out under unladen conditions with tires
on ground. Spilled oil might shorten the life of rubber bushings. Be sure to
wipe off any spilled oil.
Unladen conditions mean that fuel, engine coolant and lubricant are
...
How to use the APPS – i button
For more information about the “SiriusXM Travel
Link”, and “SiriusXM Traffic” features, see the
separate Navigation System Owner’s Manual.
For more information about the “My Apps” key,
see “NissanConnect™ App Smartphone Integration”
in this section.
For more infor ...