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

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F

G

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A

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HAC

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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.

HAC-106, "Diagnosis Proce-

dure"

A/C system cannot be controlled.

Go to Preset Switch System.

AV-105, "Symptom Table"

 

(BASE AUDIO WITHOUT 

NAVIGATION), 

AV-285, 

"Symptom Table"

 (BOSE AU-

DIO WITHOUT NAVIGATION) 

or 

AV-514, "Symptom Table"

 

(BOSE AUDIO WITH NAVIGA-

TION)

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor. 
(LAN)

HAC-69, "Diagnosis Proce-

dure"

Mode door motor does not operate 
normally.

Discharge air temperature does not 
change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor. 
(LAN)

HAC-72, "WITHOUT LEFT 

AND RIGHT VENTILATION 

TEMPERATURE SEPARATE-

LY CONTROL SYSTEM : Diag-

nosis Procedure"

 (Without left 

and right ventilation tempera-

ture separately control system) 

or 

HAC-75, "WITH LEFT AND 

RIGHT VENTILATION TEM-

PERATURE SEPARATELY 

CONTROL SYSTEM : Diagno-

sis Procedure"

 (With left and 

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)

HAC-80, "Diagnosis Proce-

dure"

Intake door motor does not operate 
normally.

Blower motor operation is malfunc-
tioning.

Go to Trouble Diagnosis Procedure for Blower Motor.

HAC-83, "WITHOUT LEFT 

AND RIGHT VENTILATION 

TEMPERATURE SEPARATE-

LY CONTROL SYSTEM : Diag-

nosis Procedure"

 (Without left 

and right ventilation tempera-

ture separately control system) 

or 

HAC-86, "WITH LEFT AND 

RIGHT VENTILATION TEM-

PERATURE SEPARATELY 

CONTROL SYSTEM : Diagno-

sis Procedure"

 (With left and 

right ventilation temperature 

separately control system)

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-90, "Diagnosis Proce-

dure"

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-119, "Inspection proce-

dure"

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-122, "Inspection proce-

dure"

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-124, "Inspection proce-

dure"

HAC-118

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

Self-diagnosis cannot be per-
formed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-126, "Inspection proce-

dure"

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory Function.

HAC-127, "Inspection proce-

dure"

Symptom

Reference page

INSUFFICIENT COOLING

HAC-119

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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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.

Refer to 

HA-36, "Inspection"

.

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 

HA-36, "Inspection"

.

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 

HA-33, "Performance Chart"

.

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.