Infiniti FX35, FX50 (S51). Manual — part 1189
UNIFIED METER AND A/C AMP.
HAC-153
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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.
A/C system cannot be controlled.
Go to Preset Switch System.
(WITHOUT
NAVIGATION),
[NAVIGATION (SINGLE MONI-
TOR)] or
[NAVIGATION (TWIN MONITOR)]
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 (driver
side) does not change.
Go to Trouble Diagnosis Procedure for Air Mix Door
Motor (driver side). (LAN)
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)
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"
78, "WITH ACCS : Diagnosis Proce-
Intake door motor does not operate
normally.
Blower motor operation is malfunc-
tioning.
Go to Trouble Diagnosis Procedure for Blower Motor.
Magnet clutch does not engage.
Go to Trouble Diagnosis Procedure for Magnet
Clutch.
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.
INSUFFICIENT COOLING
HAC-155
< 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: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.
.
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
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
(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
4.
CHECK SETTING OF TEMPERATURE SETTING TRIMMER
Check the setting of temperature setting trimmer. Refer to
HAC-6, "WITHOUT ACCS : Temperature Setting
HAC-11, "WITH ACCS : Temperature Setting Trimmer"
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
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
.
Is the inspection result normal?
YES
>> Replace the unified meter and A/C amp.
NO
>> Replace the compressor.
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