air condition INFINITI QX56 2011 Factory Service Manual

HAC-60
< BASIC INSPECTION >[AUTOMATIC AIR CONDITIONING]
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work FlowINFOID:0000000006275891
OVERALL SEQUENCE
DETAILED FLOW
1.INTERVIEW FOR MALFUNCTION
Interview the symptom to the customer.
JPLIA0313GB
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DIAGNOSIS AND REPAIR WORK FLOWHAC-61
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>> GO TO 2.
2.SYMPTOM CHECK
Check the symptom from the customer's information.
>> GO TO 3.
3.BASIC INSPECTION
Check the operation of each part. Check that any sy mptom occurs other than the interviewed symptom.
>> GO TO 4.
4.SELF-DIAGNOSIS WITH CONSULT-III
Perform the self-diagnosis with CONSULT- III. Check that any DTC is detected.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 6.
5.TROUBLE DIAGNOSIS BY DTC
Perform the trouble diagnosis for the detect ed DTC. Specify the malfunctioning part.
>> GO TO 9.
6.FAIL-SAFE ACTIVATION CHECK
Check that the symptom is appli ed to the fail-safe activation.
Does the fail
-safe activate?
YES >> GO TO 7.
NO >> GO TO 8.
7.SYSTEM DIAGNOSIS
Perform the system diagnosis for the system that the fail-safe activates. Specify the malfunctioning part.
>> GO TO 9.
8.SYMPTOM DIAGNOSIS
Perform the symptom diagnosis. Specify the malfunctioning part.
>> GO TO 9.
9.MALFUNCTION PART REPAIR
Repair or replace the malfunctioning part.
>> GO TO 10.
10.REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT-III)
Perform the self-diagnosis with CO NSULT-III. Check that any DTC is not detected. Erase DTC if DTC is
detected before the repair. Check that DTC is not detected again.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 11.
11 .REPAIR CHECK (OPERATION CHECK)
Check the operation of each part.
Does it operate normally?
YES >> INSPECTION END
NO >> GO TO 3.
Revision: 2010 May2011 QX56

HAC-62
< BASIC INSPECTION >[AUTOMATIC AIR CONDITIONING]
OPERATION INSPECTION
OPERATION INSPECTION
FRONT AUTOMATIC AIR CONDITIONING SYSTEM
FRONT AUTOMATIC AIR CONDITIONIN
G SYSTEM : Work ProcedureINFOID:0000000006275892
DESCRIPTION
The purpose of the operational check is to che ck that the individual system operates normally.
OPERATION INSPECTION
1.CHECK MEMORY FUNCTION
1. Set temperature control dial (driver side) to 32.0 °C (90 °F).
2. Press OFF switch.
3. Turn ignition switch OFF.
4. Turn ignition switch ON.
5. Press AUTO switch.
6. Check that set temperature is maintained.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 12.
2.CHECK FRONT BLOWER MOTOR
1. Start engine.
2. Operate fan switch.
3. Check that fan speed changes. C heck operation for all fan speeds.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 12.
3.CHECK DISCHARGE AIR (MOD E SWITCH AND DEF SWITCH)
1. Operate fan switch to set the fan speed to maximum speed.
2. Operate MODE switch and DEF switch.
3. Check that air outlets change according to each indica ted air outlet by placing a hand in front of the out-
lets. Refer to VTL-6, "
VENTILATION SYSTEM (FRONT AIR CO NDITIONING) : System Description".
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 12.
4.CHECK DISCHRGE AIR (UPPER VENTILATOR SWITCH)
1. Press MODE switch to set the air outlet to other than D/F or DEF.
2. Press upper ventilator switch. The upper ventilator switch indicator is turns ON.
3. Check that air flow blows from upper ventilator.
4. Press upper ventilator switch again. The upper ventilator switch indicator is turns OFF.
5. Check that air flow from upper ventilator stops.
Is the inspection result normal?
YES-1 >> With ACCS (advanced climate control system): GO TO 5.
YES-2 >> Without ACCS (advanced clim ate control system): GO TO 6.
NO >> GO TO 12.
5.CHECK INTAKE AIR [WITH ACCS (A DVANCED CLIMATE CONTROL SYSTEM)]
1. Press intake switch to set the air inlet to recirculation. The intake switch indicator turns ON.
2. Listen to intake sound and confirm air inlets change.
3. Press intake switch again to set the air inlet to fresh air intake. The intake switch indicator turns OFF.
4. Listen to intake sound and confirm air inlets change.
Is the inspection result normal?
Check condition : Engine running at normal operating temperature.
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YES >> GO TO 7.
NO >> GO TO 12.
6.CHECK INTAKE AIR [WITHOUT ACCS (ADVANCED CLIMATE CONTROL SYSTEM)]
1. Press REC switch to set the air inlet to recirculation. The REC switch indicator turns ON.
2. Listen to intake sound and confirm air inlets change.
3. Press FRE switch to set the air inlet to fresh air intake. The REC switch indicator turns OFF and FRE switch indicator turns ON.
4. Listen to intake sound and confirm air inlets change.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 12.
7.CHECK COMPRESSOR
1. Press A/C switch. The A/C switch indicator is turns ON.
2. Check visually and by sound that the compressor operates.
3. Press A/C switch again. The A/C switch indicator is turns OFF.
4. Check that compressor stops.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 12.
8.CHECK DISCHARGE AIR TEMPERATURE (LH/ RH INDEPENDENT TEMERATURE ADJUSTMENT
FUNCTION)
1. Operate temperature control dial (driver side).
2. Check that discharge air temperature (driver side) changes.
3. Operate temperature control dial (passenger side). The DUAL switch indicator is turns ON.
4. Check that the discharge air te mperature (passenger side) changes.
5. Press DUAL switch. The DUAL switch indicator is turns OFF.
6. Check that air temperature se tting (LH/RH) is unified to the driver side temperature setting.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 12.
9.CHECK WITH TEMPERAT URE SETTING LOWERED
1. Operate compressor.
2. Operate temperature control dial (drive r side) and lower the set temperature to 18°C (60 °F).
3. Check that cool air blows from the air outlets.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 12.
10.CHECK TEMPERATURE INCREASE
1. Operate temperature control dial (drive r side) and raise the set temperature to 32°C (90 °F).
2. Check that warm air blows from the air outlets.
Is the inspection result normal?
YES >> GO TO 11.
NO >> GO TO 12.
11 .CHECK AUTO MODE
1. Press AUTO switch to confirm that “AUTO” is indicated on the display.
2. Operate temperature control dial (driver side) to check that fan speed or air outlet changes (the air outlet
or fan speed varies depending on the ambient temperatur e, in-vehicle temperature (front side), set tem-
perature, and etc.).
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 12.
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HAC-64
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OPERATION INSPECTION
12.CHECK SELF-DIAGNOSIS WITH CONSULT-III
1. Perform self-diagnosis with CONSULT-III.
2. Check that any DTC is detected.
Is any DTC detected?
YES >> Refer to HAC-45, "DTC Index" and perform the appropriate diagnosis.
NO >> GO TO 13.
13.CHECK FAIL-SAFE ACTIVATION
Check that symptom is applied to the fail-safe activation. Refer to HAC-45, "
Fail-safe".
>> Refer to HAC-133, "
Diagnosis Chart By Symptom" and perform the appropriate diagnosis.
REAR AUTOMATIC AIR CONDITIONING SYSTEM
REAR AUTOMATIC AIR CONDITION ING SYSTEM : Work ProcedureINFOID:0000000006275893
DESCRIPTION
The purpose of the operational check is to che ck that the individual system operates normally.
NOTE:
Check that front automatic air conditioning system operates normally. Refer to HAC-133, "
Diagnosis Chart By
Symptom".
OPERATION INSPECTION
Front A/C Control Operation
1.CHECK REAR CONTROL MODE FUNCTION
1. Press REAR switch. The REAR switch indicator turns ON.
2. Check that front display changes to state indication di splay (rear control mode) and that rear automatic air
conditioning system starts.
3. Press REAR switch again. The REAR switch indicator turns OFF.
4. Check that rear control mode released. (rear aut omatic air conditioning system operates continuously)
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 8.
2.CHECK REAR BLOWER MOTOR
1. Press REAR switch.
2. Operate fan switch.
3. Check that fan speed changes. C heck operation for all fan speeds.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 8.
3.CHECK DISCHARGE AIR
1. Operate fan switch to set the fan speed to maximum speed.
2. Operate MODE switch.
3. Check that air outlets change according to each indica ted air outlet by placing a hand in front of the out-
lets. Refer to VTL-7, "
VENTILATION SYSTEM (REAR AIR CO NDITIONING) : System Description".
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 8.
4.CHECK DISCHARGE AIR TEMPERATURE
1. Operate temperature control dial (driver side). Check condition
: Engine running at normal operating temperature.
: Front air conditioning system operate.
Revision: 2010 May2011 QX56

OPERATION INSPECTIONHAC-65
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2. Check that discharge air temperature changes.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 8.
5.CHECK WITH TEMPERAT URE SETTING LOWERED
1. Operate temperature control dial (drive r side) and lower the set temperature to 18°C (60 °F).
2. Check that cool air blows from the air outlets.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 8.
6.CHECK TEMPERATURE INCREASE
1. Operate temperature control dial (drive r side) and raise the set temperature to 32°C (90 °F).
2. Check that warm air blows from the air outlets.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 8.
7.CHECK AUTO MODE
1. Press AUTO switch.
2. Operate temperature control dial (driver side) to check that fan speed or air outlet changes (the air outlet
or fan speed varies depending on the ambient temperatur e, in-vehicle temperature (rear side), set tem-
perature, and etc.).
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 8.
8.CHECK SELF-DIAGNOSIS WITH CONSULT-III
1. Perform self-diagnosis with CONSULT-III.
2. Check that any DTC is detected.
Is any DTC detected?
YES >> Refer to HAC-45, "DTC Index" and perform the appropriate diagnosis.
NO >> Refer to HAC-135, "
Diagnosis Chart By Symptom" and perform the appropriate diagnosis.
Rear A/C Control Operation
1.CHECK REAR BLOWER MOTOR
1. Press AUTO switch.
2. Operate fan switch.
3. Check that fan speed changes. C heck operation for all fan speeds.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 7.
2.CHECK DISCHARGE AIR
1. Operate fan switch to set the fan speed to maximum speed.
2. Operate MODE switch.
3. Check that air outlets change according to each indica ted air outlet by placing a hand in front of the out-
lets. Refer to VTL-7, "
VENTILATION SYSTEM (REAR AIR CONDI TIONING) : System Description".
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 7.
3.CHECK DISCHARGE AIR TEMPERATURE
1. Operate temperature control switch.
2. Check that discharge air temperature changes.
Is the inspection result normal?
Revision: 2010 May2011 QX56

HAC-66
< BASIC INSPECTION >[AUTOMATIC AIR CONDITIONING]
OPERATION INSPECTION
YES >> GO TO 4.
NO >> GO TO 7.
4.CHECK WITH TEMPERATURE SETTING LOWERED
1. Operate temperature control switch and lower the set temperature to 18°C.
2. Check that cool air blows from the air outlets.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 7.
5.CHECK TEMPERATURE INCREASE
1. Operate temperature control switch and raise the set temperature to 32°C.
2. Check that warm air bl ows from the air outlets.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 7.
6.CHECK AUTO MODE
1. Press AUTO switch.
2. Operate temperature control switch to check that fan speed or air outlet changes (the air outlet or fan
speed varies depending on the ambient temperature, in-v ehicle temperature (rear side), set temperature,
and etc.).
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 7.
7.CHECK SELF-DIAGNOSIS WITH CONSULT-III
1. Perform self-diagnosis with CONSULT-III.
2. Check that any DTC is detected.
Is any DTC detected?
YES >> Refer to HAC-45, "DTC Index" and perform the appropriate diagnosis.
NO >> Refer to HAC-135, "
Diagnosis Chart By Symptom" and perform the appropriate diagnosis.
ACCS (ADVANCED CLIM ATE CONTROL SYSTEM)
ACCS (ADVANCED CLIMATE CONT ROL SYSTEM) : Work ProcedureINFOID:0000000006275894
DESCRIPTION
The purpose of the operational check is to che ck that the individual system operates normally.
NOTE:
Check that front automatic air conditi oning system operates normally. Refer to HAC-62, "
FRONT AUTOMATIC
AIR CONDITIONING SYSTEM : Work Procedure".
OPERATION INSPECTION
1.CHECK PLASMACLUSTER™ CONTROL
Check the ionizer operation sound (whirring sound) in the duc t by putting an ear to the center ventilator grille
(driver side) outlet while pressing fan switch and OFF switch alternately.
NOTE:
 Plasmacluster
™ ion technology developed by Sharp Corporation is installed in this item.
 Plasmacluster
™ is a trademark of Sharp Corporation.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK PLASMACLUSTER™ CONTROL OPERATION STATUS
Check condition : Engine running
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OPERATION INSPECTIONHAC-67
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Operate fan switch. Visually check that status indica tor in front display changes in accordance with the follow-
ing table.
NOTE:
 Plasmacluster
™ ion technology developed by Sharp Corporation is installed in this item.
 Plasmacluster
™ is a trademark of Sharp Corporation.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK AUTOMATIC INTAKE CONTROL (EXHAUST GAS / OUTSIDE ODOR DETECTING MECHANISM)
1. Operate fan switch to set the fan speed to maximum speed.
2. Press auto intake switch to set the air inlet to recirculation. The auto intake switch indicator and intake switch indicator turn ON.
3. Listen to intake sound and confirm air inlets change.
4. Wait approximately for 5 minutes until ai r inlet switches to fresh air intake.
5. Apply cigarette smoke or similar substance to exhaust gas / outside odor detecting sensor portion.
6. Listen to intake sound and confirm air inlets change to recirculation.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK SELF-DIAGNOSIS WITH CONSULT-III
1. Perform self-diagnosis with CONSULT-III.
2. Check that any DTC is detected.
Is any DTC detected?
YES >> Refer to HAC-45, "DTC Index" and perform the appropriate diagnosis.
NO >> Refer to HAC-135, "
Diagnosis Chart By Symptom" and perform the appropriate diagnosis.
Fan speed Front display (ion indicator)
2nd CLEAN
5th QUICK CLEAN
Revision: 2010 May2011 QX56

HAC-68
< BASIC INSPECTION >[AUTOMATIC AIR CONDITIONING]
SYSTEM SETTING
SYSTEM SETTING
FRONT AUTOMATIC AIR CONDITIONING SYSTEM
FRONT AUTOMATIC AIR CONDITIONING SYST
EM : Temperature Setting Trimmer
(Front)
INFOID:0000000006275896
DESCRIPTION
If the temperature felt by the customer is different from the front air flow temperature controlled by the temper-
ature setting, the A/C auto amp. control temperature can be adjusted to compensate for the temperature set-
ting.
HOW TO SET
With CONSULT-III
Perform “TEMP SET CORRECT” of HVAC work support item.
NOTE:
 When −3.0 °C ( −6 °F) is corrected on the temperature setting set as 25.0 °C (77 °F) the temperature controlled
by A/C auto amp. is 25.0 °C (77 °F) −3.0 °C ( −6 °F) = 22.0 °C (72 °F) and the temperature becomes lower than
the temperature setting.
 When the battery cable is disconnected from the negativ e terminal or when the battery voltage becomes 10
V or less, the setting of the difference between t he set temperature and control temperature may be can-
celled.
FRONT AUTOMATIC AIR CONDITIONING SYSTEM : Foot Position Setting Trimmer
INFOID:0000000006275897
DESCRIPTION
In FOOT mode, the air blowing to DEF can change ON/OFF.
HOW TO SET
With CONSULT-III
Perform the “BLOW SET” of HVAC work support item.
Work support items Display ( °C) Display ( °F)
TEMP SET CORRECT 3.0 6
2.5 5
2.0 4
1.5 3
1.0 2
0.5 1
0 (initial status) 0 (initial status) −0.5 −1
− 1.0 −2
− 1.5 −3
− 2.0 −4
− 2.5 −5
− 3.0 −6
Work support items Display Defroster door position
Auto control Manual control
BLOW SET Mode1 OPEN CLOSE
Mode2 (initial status) OPEN OPEN
Mode3 CLOSE OPEN
Mode4 CLOSE CLOSE
Revision: 2010 May2011 QX56

SYSTEM SETTINGHAC-69
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NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the discharge air mix ratio in FOOT mode may be cancelled.
FRONT AUTOMATIC AIR CONDITIONING SYS TEM : Inlet Port Memory Function
(FRE)
INFOID:0000000006275898
DESCRIPTION
 If the ignition switch is turned to the OFF position while t he intake switch is set to OFF (fresh air intake), “Per-
form the memory” or “Do not perform the memory” of in take switch OFF (fresh air intake) condition can be
selected.
 If “Perform the memory” was set, the intake switch will be OFF (fresh air intake) when turning the ignition
switch to the ON position again.
 If “Do not perform the memory” was set, the air inlets will be controlled automatically when turning the igni-
tion switch to the ON position again.
HOW TO SET
With CONSULT-III
Perform the “FRE MEMORY SET” of HVAC work support item.
NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the FRE memory function may be cancelled.
FRONT AUTOMATIC AIR CONDITIONING SYS TEM : Inlet Port Memory Function
(REC)
INFOID:0000000006275899
DESCRIPTION
 If the ignition switch is turned to the OFF position while the intake switch is set to ON (recirculation), “Per-
form the memory” or “Do not perform the memory” of intake switch ON (recirculation) condition can be
selected.
 If “Perform the memory” was set, the intake switch will be ON (recirculation) when turning the ignition switch
to the ON position again.
 If “Do not perform the memory” was set, the air inlets will be controlled automatically when turning the igni-
tion switch to the ON position again.
HOW TO SET
With CONSULT-III
Perform the “REC MEMORY SET” of HVAC work support item.
NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the REC memory function may be cancelled.
REAR AUTOMATIC AIR CONDITIONING SYSTEM
REAR AUTOMATIC AIR CONDITIONING SYST EM : Temperature Setting Trimmer
(Rear)
INFOID:0000000006275900
DESCRIPTION
Work support items Display Setting
FRE MEMORY SET WITHOUT Perform the memory of manual FRE
WITH (initial status) Do not perform the memory of manual FRE (auto control)
Work support items Display Setting
REC MEMORY SET WITHOUT (initial status) Perform the memory of manual REC
WITH Do not perform the memory of manual REC (auto control)
Revision: 2010 May2011 QX56