Nissan Pathfinder (2012 year). Manual - part 423

HAC-106

< WIRING DIAGRAM >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

ABIIA0791GB

August 2012

2012 Pathfinder

AIR CONDITIONER CONTROL

HAC-107

< WIRING DIAGRAM >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

ABIIA0792GB

August 2012

2012 Pathfinder

HAC-108

< WIRING DIAGRAM >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

ABIIA0793GB

August 2012

2012 Pathfinder

AIR CONDITIONER CONTROL

HAC-109

< WIRING DIAGRAM >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

ABIIA0794GB

August 2012

2012 Pathfinder

HAC-110

< WIRING DIAGRAM >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

ABIIA0795GB

August 2012

2012 Pathfinder

AIR CONDITIONER CONTROL

HAC-111

< 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

Symptom Matrix Chart

INFOID:0000000007356401

SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-90

A/C system display is malfunctioning. 

Go to AV System.

AV-162

, 

AV-65

A/C system cannot be controlled.

Go to Self-diagnosis Function.

HAC-24

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

HAC-27

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

HAC-32

, 

HAC-34

Air mix door motor is malfunctioning.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

HAC-39

Intake door motor is malfunctioning.

Front blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-42

Rear blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Rear Blower Motor.

HAC-48

Rear discharge air temperature and/or air 
outlet does not change.

Go to Trouble Diagnosis Procedure for Rear Air Control system.

HAC-57

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-69

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-112

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-120

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-122

Self-diagnosis cannot be performed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-91

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory Function.

HAC-124

August 2012

2012 Pathfinder

HAC-112

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT COOLING

INSUFFICIENT COOLING

Component Function Check

INFOID:0000000007356402

SYMPTOM: Insufficient cooling

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE 

1. Press the AUTO switch.

2. Turn temperature control dial (driver) counterclockwise until 18

°

C (60

°

F) is displayed.

3. Check for cold air at discharge air outlets.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FOR ANY SYMPTOMS 

Perform a complete operational check for any symptoms. Refer to 

HAC-5, "Operational Check (Front)"

 or

HAC-6, "Operational Check (Rear)"

.

Does another symptom exist?

YES

>> Refer to 

HAC-111, "Symptom Matrix Chart"

. 

NO

>> System OK.

3.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis Refer to 

HAC-24, "A/C Auto Amp. Self-Diagnosis"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Refer to 

HAC-25, "A/C System Self-Diagnosis Code Chart"

.

5.

CHECK DRIVE BELTS 

Check compressor belt tension. Refer to 

EM-14, "Checking Drive Belts"

 (VQ40DE) or 

EM-152, "Checking

Drive Belts"

 (VK56DE).

Is the inspection result normal?

OK

>> GO TO 6.

NG

>> Adjust or replace compressor belt. Refer to 

EM-14, "Adjustment"

, 

EM-14, "Removal and Installa-

tion"

 (VQ40DE) or 

EM-152, "Adjustment"

, 

EM-152, "Removal and Installation"

 (VK56DE).

6.

CHECK AIR MIX DOOR OPERATION

Check and verify air mix door mechanism for smooth operation. Refer to 

HAC-31, "Air Mix Door Motor (Driver)

Component Function Check"

 or 

HAC-34, "Air Mix Door Motor (Passenger) Component Function Check"

.

Does air mix door operate correctly?

YES

>> GO TO 7.

NO

>> Check air mix door motor circuit. Refer to 

HAC-32, "Air Mix Door Motor (Driver) Diagnosis Proce-

dure"

 or 

HAC-34, "Air Mix Door Motor (Passenger) Diagnosis Procedure"

.

7.

CHECK COOLING FAN MOTOR OPERATION

Check and verify cooling fan motor for smooth operation.
Does cooling fan motor operate correctly?

YES

>> GO TO 8.

NO

>> Check cooling fan motor.

8.

CHECK WATER VALVE OPERATION (VK56DE ONLY)

Check and verify water valve for smooth operation. Refer to 

HAC-74, "Water Valve Description (VK56DE)"

.

August 2012

2012 Pathfinder

INSUFFICIENT COOLING

HAC-113

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Does water valve operate correctly?

YES

>> GO TO 9.

NO

>> Check water valve circuit. Refer to 

HAC-74, "Water Valve Diagnosis Procedure (VK56DE)"

.

9.

CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE

Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/

recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.

>> GO TO 10.

10.

CHECK REFRIGERANT PURITY

1. Connect recovery/recycling equipment to vehicle.

2. Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant identifier.
Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Check contaminated refrigerant. Refer to 

HAC-126, "Working with HFC-134a (R-134a)"

.

11.

CHECK FOR EVAPORATOR FREEZE UP

Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up?

YES

>> Perform diagnostic work flow. Refer to 

HAC-113, "Diagnostic Work Flow"

.

NO

>> GO TO 12.

12.

CHECK REFRIGERANT PRESSURE

Check refrigerant pressure with manifold gauge connected. Refer to 

HAC-115, "Performance Chart"

. 

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Perform diagnostic work flow. Refer to 

HAC-113, "Diagnostic Work Flow"

.

13.

CHECK AIR DUCTS

Check ducts for air leaks.
Is the inspection result normal?

YES

>> System OK.

NO

>> Repair air leaks.

Diagnostic Work Flow

INFOID:0000000007356403

August 2012

2012 Pathfinder