Infiniti FX35, FX50 (S51). Manual - part 1189

UNIFIED METER AND A/C AMP.

HAC-153

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

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Compressor

: ON

Air outlet

: AUTO

Air inlet

: FRE (Fresh)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

HAC-154

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

SYMPTOM DIAGNOSIS

AIR CONDITIONER CONTROL

Diagnosis Chart By Symptom

INFOID:0000000005246302

*: With advanced climate control system (ACCS)

Symptom

Reference

A/C system does not activate.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-69, "Diagnosis Procedure"

A/C system cannot be controlled.

Go to Preset Switch System.

AV-130, "Symptom Table"

 (WITHOUT 

NAVIGATION), 

AV-321, "Symptom Ta-

ble"

 [NAVIGATION (SINGLE MONI-

TOR)] or 

AV-549, "Symptom Table"

 

[NAVIGATION (TWIN MONITOR)]

Air outlet does not change.

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

HAC-70, "Diagnosis Procedure"

Mode door motor does not operate 
normally.

Discharge air temperature (driver 
side) does not change.

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

HAC-72, "Diagnosis Procedure"

Air mix door motor (driver side) does 
not operate normally.

Discharge air temperature (passen-
ger side) does not change.

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

HAC-74, "Diagnosis Procedure"

Air mix door motor (passenger side) 
does not operate normally.

Intake door does not change.

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

HAC-76, "WITHOUT ACCS : Diagnosis 
Procedure"

 (WITHOUT ACCS) or 

HAC-

78, "WITH ACCS : Diagnosis Proce-

dure"

 (WITH ACCS)

Intake door motor does not operate 
normally.

Blower motor operation is malfunc-
tioning.

Go to Trouble Diagnosis Procedure for Blower Motor.

HAC-80, "Diagnosis Procedure"

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet 
Clutch.

HAC-84, "Diagnosis Procedure"

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient 
Cooling.

HAC-155, "Inspection procedure"

No cool air comes out.
(Air flow volume is normal.)

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient 
Heating.

HAC-157, "Inspection procedure"

No warm air comes out.
(Air flow volume is normal.)

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-159, "Inspection procedure"

Self-diagnosis cannot be performed.

Go to Trouble Diagnosis Procedure for Self-diagno-
sis.

HAC-161, "Inspection procedure"

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory 
Function.

HAC-162, "Inspection procedure"

Plasmacluster system does not oper-

ate.

*

Go to Trouble Diagnosis Procedure for Plasmacluster 
system.

HAC-102, "Diagnosis Procedure"

INSUFFICIENT COOLING

HAC-155

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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INSUFFICIENT COOLING

Description

INFOID:0000000005246303

Symptom

• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)

Inspection procedure

INFOID:0000000005246304

1.

CHECK WITH A GAUGE OF RECOVERY/RECYCLING RECHARGING EQUIPMENT

Connect the 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-34, "Inspection"

.

NO-2

>> GO TO 2 after repairing or replacing the parts according to the inspection results.

2.

CHECK CHARGED REFRIGERANT AMOUNT

1.

Connect recovery/recycling recharging equipment to the vehicle and discharge the refrigerant. Refer to

HA-25, "Collection and Charge"

.

2.

Recharge with the proper amount of refrigerant. Refer to 

HA-25, "Collection and Charge"

.

3.

Perform the inspection with the refrigerant leakage detecting fluorescent leak detector. Refer to 

HA-34,

"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.

PERFORM THE PERFORMANCE TEST

Connect recovery/recycling recharging equipment to the vehicle and perform the performance test. Refer to

HA-32, "Performance Chart"

 (VQ35HR) or 

HA-88, "Performance Chart"

 (VK50VE).

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform the diagnosis with the gauge pressure. Refer to 

HA-8, "Trouble Diagnosis For Unusual

Pressure"

.

4.

CHECK SETTING OF TEMPERATURE SETTING TRIMMER

Check the setting of temperature setting trimmer. Refer to 

HAC-6, "WITHOUT ACCS : Temperature Setting

Trimmer"

 (WITHOUT ACCS) or 

HAC-11, "WITH ACCS : Temperature Setting Trimmer"

 (WITH ACCS).

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

>> INSPECTION END

NO

>> GO TO 5.

5.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis function. Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis Description"

 (WITHOUT

ACCS) or 

HAC-62, "WITH ACCS : Diagnosis Description"

 (WITH ACCS).

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace parts according to the inspection results.

6.

CHECK DRIVE BELT

Check tension of the drive belt. Refer to 

EM-15, "Checking"

 (VQ35HR) or 

EM-163, "Checking"

 (VK50VE).

HAC-156

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT COOLING

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Adjust or replace drive belt.

7.

CHECK AIR LEAKAGE FROM DUCT

Check duct and nozzle, etc. of A/C system for air leakage.
Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace parts according to the inspection results.

8.

CHECK ECV

Perform the ECV diagnosis procedure. Refer to 

HAC-86, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the unified meter and A/C amp.

NO

>> Replace the compressor.