Nissan Sentra. Instruction — part 563
HAC-100
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
INSUFFICIENT COOLING
The control temperature can be set with the setting of the temperature setting trimmer (front).
3. Set difference between set temperature and control temperature to “0”.
Is inspection result normal?
YES
>> Inspection End.
NO
>> Replace A/C auto amp. Refer to
HAC-105, "Removal and Installation"
.
INSUFFICIENT HEATING
HAC-101
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
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HAC
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INSUFFICIENT HEATING
Description
INFOID:0000000009757697
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000009757698
NOTE:
Perform self-diagnosis with 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
HAC-55, "Temperature Setting Trim-
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-105, "Removal and Installation"
.
HAC-102
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
COMPRESSOR DOES NOT OPERATE
COMPRESSOR DOES NOT OPERATE
Description
INFOID:0000000009757699
Symptom: Compressor does not operate.
Diagnosis Procedure
INFOID:0000000009757700
NOTE:
• Perform self-diagnoses with CONSULT before performing symptom diagnosis. If DTC is detected, perform
the corresponding diagnosis.
• Check that refrigerant system is properly charged. If refrigerant amount is below the proper amount, perform
inspection of refrigerant leakage.
1.
CHECK MAGNET CLUTCH OPERATION
Check magnet clutch. Refer to
HAC-94, "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 A/C AUTO AMP. OUTPUT SIGNAL
With CONSULT
Check “COMP REQ SIG” and “FAN REQ SIG” in “DATA MONITOR” mode of “HVAC” using CONSULT.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace A/C auto amp. Refer to
HAC-105, "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
1. Start engine.
Monitor item
Condition
Status
COMP REQ SIG
A/C switch
ON
On
OFF
Off
FAN REQ SIG
Blower motor
ON
On
OFF
Off
Monitor item
Condition
Status
AIR COND SIG
A/C switch
ON
On
OFF
Off
HEATER FAN SW
Blower motor
ON
On
OFF
Off
COMPRESSOR DOES NOT OPERATE
HAC-103
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
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2. Check “AC COMP REQ” in “DATA MONITOR” mode of “IPDM E/R” using CONSULT.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Check CAN communication system. Refer to
LAN-16, "Trouble Diagnosis Flow Chart"
Monitor item
Condition
Status
AC COMP REQ
A/C switch
ON
On
OFF
Off
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