Infiniti G35 (V35) Sedan. Manual — part 786
HAC-116
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AUTO AMP.
Compressor
: ON
Air outlet
: AUTO
Air inlet
: FRE (Fresh)
Blower fan speed
: AUTO
Set temperature
: Setting before communication error occurs
Display
: OFF
AIR CONDITIONER CONTROL
HAC-117
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
SYMPTOM DIAGNOSIS
AIR CONDITIONER CONTROL
Diagnosis Chart By Symptom
INFOID:0000000000959974
Symptom
Reference page
A/C system does not come on.
Go to Trouble Diagnosis Procedure for A/C System.
A/C system cannot be controlled.
Go to Preset Switch System.
(BASE AUDIO WITHOUT
NAVIGATION),
(BOSE AU-
DIO WITHOUT NAVIGATION)
or
(BOSE AUDIO WITH NAVIGA-
TION)
Air outlet does not change.
Go to Trouble Diagnosis Procedure for Mode Door Motor.
(LAN)
Mode door motor does not operate
normally.
Discharge air temperature does not
change.
Go to Trouble Diagnosis Procedure for Air Mix Door Motor.
(LAN)
(Without left
and right ventilation tempera-
ture separately control system)
or
right ventilation temperature
separately control system)
Air mix door motor does not operate
normally.
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door Motor.
(LAN)
Intake door motor does not operate
normally.
Blower motor operation is malfunc-
tioning.
Go to Trouble Diagnosis Procedure for Blower Motor.
(Without left
and right ventilation tempera-
ture separately control system)
or
right ventilation temperature
separately control system)
Magnet clutch does not engage.
Go to Trouble Diagnosis Procedure for Magnet Clutch.
Insufficient cooling
Go to Trouble Diagnosis Procedure for Insufficient Cooling.
Insufficient heating
Go to Trouble Diagnosis Procedure for Insufficient Heating.
Noise
Go to Trouble Diagnosis Procedure for Noise.
HAC-118
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
Self-diagnosis cannot be per-
formed.
Go to Trouble Diagnosis Procedure for Self-diagnosis.
Memory function does not operate.
Go to Trouble Diagnosis Procedure for Memory Function.
Symptom
Reference page
INSUFFICIENT COOLING
HAC-119
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
INSUFFICIENT COOLING
Description
INFOID:0000000000959975
Symptom
• Insufficient cooling
• No cold air comes out. (Air flow volume is normal.)
Inspection procedure
INFOID:0000000000959976
1.
CHECK WITH A GAUGE OF REFRIGERANT RECONERY/RECYCLING RECHARGING EQUIPMENT
Connect the refrigerant recovery/recycling recharging equipment to the vehicle and perform the pressure
inspection with the gauge.
Is there refrigerant?
YES
>> GO TO 2.
NO-1
>> Check for refrigerant leakages with the refrigerant leakage detecting fluorescent leak detector.
.
NO-2
>> GO TO 2 after repairing or replacing the parts according to the inspection results.
2.
CHECK CHARGED REFRIGERANT AMOUNT
1.
Connect refrigerant recovery/recycling recharging equipment to the vehicle and discharge the refrigerant.
2.
Recharge with the proper amount of refrigerant and perform the inspection with the refrigerant leakage
detecting fluorescent leak detector. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Refill the refrigerant and repair or replace the parts according to the inspection results.
3.
CHECK REFRIGERANT CYCLE PRESSURE
Connect refrigerant recovery/recycling recharging equipment to the vehicle and perform the performance test.
Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform the diagnosis with the gauge pressure. Refer to
HA-11, "SYMPTOM DIAGNOSIS PRO-
CEDURE : Trouble Diagnosis For Unusual Pressure"
.
4.
CHECK SETTING OF TEMPERATURE SETTING TRIMMER
Check the setting of temperature setting trimmer. Refer to
HAC-5, "WITHOUT LEFT AND RIGHT VENTILA-
TION TEMPERATURE SEPARATELY CONTROL SYSTEM : Description & Inspection"
(Without left and right
ventilation temperature separately control system) or
HAC-9, "WITH LEFT AND RIGHT VENTILATION TEM-
PERATURE SEPARATELY CONTROL SYSTEM : Description & Inspection"
(With left and right ventilation
temperature separately control system).
1.
Check that the temperature setting trimmer is set to “+ direction”.
NOTE:
The control temperature can be set with the setting of temperature setting trimmer.
2.
Set temperature control dial to “0”.
Are the symptoms solved?
YES
>> Perform the setting separately if necessary. END.
NO
>> GO TO 5.
5.
PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to
HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-
TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left and right ventilation tempera-
ture separately control system) or
HAC-50, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE
SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(With left and right ventilation temperature sepa-
rately control system), see No. 1 to 2.
Does code No. 20 appear on the display?
YES
>> GO TO 6.
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