Nissan Cube. Instruction — part 569
HAC-114
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
AUTOMATIC AIR CONDITIONING SYSTEM
SYMPTOM DIAGNOSIS
AUTOMATIC AIR CONDITIONING SYSTEM
Diagnosis Chart By Symptom
INFOID:0000000009951023
CAUTION:
Perform the self-diagnoses with on board diagnosis and CONSULT before performing the symptom
diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.
Symptom
Corresponding malfunction part
Check item/Reference
A/C system does not activate.
• Power supply circuit of A/C system
• A/C control (built-in A/C auto amp.)
HAC-64, "A/C AUTO AMP. : Di-
agnosis Procedure"
A/C system cannot be controlled.
Blower motor operation is malfunctioning.
• Blower motor
• Power supply system of blower mo-
tor
• The circuit between blower motor
and A/C auto amp.
• A/C auto amp.
Magnet clutch does not operate.
• Magnet clutch
• The circuit between magnet clutch
and IPDM E/R
• IPDM E/R (A/C relay)
• The circuit between ECM and refrig-
erant pressure sensor
• Refrigerant pressure sensor
• CAN communication line
• A/C auto amp.
• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)
• Magnet clutch control system
• Drive belt slipping
• Cooler cycle
• Air leakage from each duct
• Temperature setting trimmer
HAC-115, "Diagnosis Proce-
dure"
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
• Engine cooling system
• Heater hose
• Heater core
• Air leakage from each duct
• Temperature setting trimmer
HAC-117, "Diagnosis Proce-
dure"
Noise is heard when the A/C
system operates.
During compressor op-
eration
Cooler cycle
During blower motor op-
eration
• Mixing any foreign object in blower
motor
• Blower motor fan breakage
• Blower motor rotation inferiority
HAC-57, "Component Inspec-
tion"
• Memory function dose not operates.
• Setting temperature dose not memorize.
• Power supply system of A/C auto
amp.
• A/C auto amp.
INSUFFICIENT COOLING
HAC-115
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
INSUFFICIENT COOLING
Description
INFOID:0000000009951024
Symptom
• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000009951025
CAUTION:
Perform the self-diagnoses with on board diagnosis and CONSULT before performing symptom diag-
nosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.
1.
CHECK MAGNET CLUTCH OPERATION
1.
Turn the ignition switch ON.
2.
Operate the fan control switch.
3.
Press the A/C switch.
4.
Check that the indicator of the A/C switch turns ON. Check visually and by sound that the compressor
operates.
5.
Press the A/C switch again.
6.
Check that the indicator of the A/C switch turns OFF. Check that the compressor stops.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the diagnosis of “COMPRESSOR DOSE NOT OPERATE” in “SYMPTOM DIAGNOSIS”.
HAC-118, "Diagnosis Procedure"
.
2.
CHECK DRIVE BELT
Check tension of the drive belt. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Adjust or replace drive belt depending on the inspection results.
3.
CHECK REFRIGERANT CYCLE PRESSURE
Connect the recovery/recycling recharging equipment to the vehicle and perform the pressure inspection with
the gauge. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the parts depending on the inspection results.
4.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the air conditioner system for leakage.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace parts depending on the inspection results.
5.
CHECK AMBIENT TEMPERATURE DISPLAY
Check that there is not much difference between actual ambient temperature and indicated temperature on
information display in combination meter.
NOTE:
Actual ambient temperature is sensor recognition temperature of on board self-diagnosis STEP-5.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Perform the diagnosis for the A/C auto amp. connection recognition signal. Refer to
6.
CHECK SETTING OF TEMPERATURE SETTING TRIMMER
1.
Check the setting value of temperature setting trimmer. Refer to
HAC-10, "Temperature Setting Trimmer"
.
HAC-116
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
INSUFFICIENT COOLING
2.
Check that the temperature setting trimmer is set to “+ direction”.
NOTE:
The control temperature can be set with the setting of the temperature setting trimmer.
3.
Set the difference between the set temperature and control temperature to “0”.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the A/C auto amp.
INSUFFICIENT HEATING
HAC-117
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
INSUFFICIENT HEATING
Description
INFOID:0000000009951026
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000009951027
CAUTION:
Perform the self-diagnoses with on board diagnosis and CONSULT before performing symptom diag-
nosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.
1.
CHECK COOLING SYSTEM
1.
Check the engine coolant level and check for leakage. Refer to
2.
Check the radiator cap. Refer to
CO-12, "RADIATOR CAP : Inspection"
3.
Check the water flow sounds of the engine coolant. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Refill the engine coolant and repair or replace the parts depending on the inspection results.
2.
CHECK HEATER HOSE
Check the installation of heater hose by visually or 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 the temperature of inlet hose and outlet hose of heater core.
2.
Check that the 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 the heater core. Refer to
HA-42, "Exploded View (Automatic Air Conditioner)"
.
4.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the air conditioner 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
1.
Check the setting value of temperature setting trimmer. Refer to
HAC-10, "Temperature Setting Trimmer"
.
2.
Check that the temperature setting trimmer is set to “
−
direction”.
NOTE:
The control temperature can be set by the temperature setting trimmer.
3.
Set the difference between the set temperature and control temperature to “0”.
Are the symptoms solved?
YES
>> INSPECTION END
NO
>> Replace the A/C auto amp.
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