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Nissan Pathfinder (2010 year). Manual - part 455

HAC-116

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT HEATING

CHECK ENGINE COOLANT SYSTEM

Check engine coolant temperature sensor.
Is the inspection result normal?

YES

>> System OK.

>> Repair or replace as necessary. Retest.

CHECK HEATER HOSES

Check heater hoses for proper installation.
Is the inspection result normal?

YES

>> System OK.

>> 1. Back flush heater core.

2. Drain the water from the system.

3. Refill system with new engine coolant. Refer to

CO-12, "Changing Engine Coolant"

(VQ40DE) or

CO-40, "Changing Engine Coolant"

(VK56DE).

4. GO TO 10 to retest.

10.

CHECK HEATER HOSE TEMPERATURES

1. Start engine and warm it up to normal operating temperature.

2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be

warm.

Is the inspection result normal?

YES

>> System OK.

>> Replace heater core. Refer to

VTL-26, "Removal and Installation"

11.

CHECK HEATER PUMP (VQ40DE ONLY)

Check the operation of the heater pump valve. Refer to

HAC-74, "Component Inspection (VQ40DE)"

Is the inspection result normal?

YES

>> System OK.

>> Replace heater pump. Refer to

HA-57, "Removal and Installation"

2010 Pathfinder

NOISE

HAC-117

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

NOISE

Component Function Check

INFOID:0000000005256972

SYMPTOM: Noise

INSPECTION FLOW

AWIIA1001GB

2010 Pathfinder

HAC-118

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

NOISE

HAC-5, "Operational Check (Front)"

and

HAC-6, "Operational Check

(Rear)"

EM-14, "Checking Drive Belts"

(VQ40DE) or

EM-149, "Checking

Drive Belts"

(VK56DE)

HAC-110, "Performance Chart"

VTL-24, "Removal and Installation for
Rear Expansion Valve"

HA-40, "Removal and Installation for
Compressor Clutch"

HA-39, "Removal and Installation for
Compressor"

HA-27, "Maintenance of Oil Quantity
in Compressor"

HA-53, "Removal and Installation for
Condenser"

2010 Pathfinder

MEMORY FUNCTION DOES NOT OPERATE

HAC-119

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

MEMORY FUNCTION DOES NOT OPERATE

Memory Function Check

INFOID:0000000005256973

SYMPTOM: Memory function does not operate.

INSPECTION FLOW

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MEMORY FUNCTION

1. Set the temperature to 32

C (90

F).

2. Press the OFF switch.

3. Turn ignition switch OFF.

4. Turn ignition switch ON.

5. Press the AUTO switch.

6. Confirm that the set temperature remains at previous temperature.

7. Press the OFF switch.
Can the symptom be duplicated?

YES

>> GO TO 3.

>> GO TO 2.

PERFORM COMPLETE OPERATIONAL CHECK

Perform a complete operational check and check for any symptoms. Refer to

HAC-123, "Operational Check"

Can a symptom be duplicated?

YES

>> Refer to

HAC-122, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"

>> System OK.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis to check for any codes. Refer to

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

Are any self-diagnosis codes present?

YES

>> Refer to

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

>> GO TO 5.

CHECK POWER AND GROUND CIRCUIT

Check main power supply and ground circuit. Refer to

HAC-160, "Front Air Control Component Function

Check"

Is the inspection result normal?

YES

>> GO TO 6.

>> Repair or replace as necessary.

RECHECK FOR SYMPTOMS

Perform a complete operational check for any symptoms. Refer to

HAC-123, "Operational Check"

Does another symptom exist?

YES

>> Refer to

HAC-122, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"

>> Replace A/C auto amp. Refer to

VTL-7, "Removal and Installation"

2010 Pathfinder

HAC-120

< PRECAUTION >

[AUTOMATIC AIR CONDITIONER]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

INFOID:0000000005476025

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Working with HFC-134a (R-134a)

INFOID:0000000005256975

WARNING:

• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants

are mixed compressor failure is likely to occur. Refer to

HA-4, "Contaminated Refrigerant"

. To deter-

mine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant Recovery/

Recycling Recharging equipment and Refrigerant Identifier.

• Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If

oil other than that specified is used, compressor failure is likely to occur.

• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following

handling precautions must be observed:

- When removing refrigerant components from a vehicle, immediately cap (seal) the component to

minimize the entry of moisture from the atmosphere.

- When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just

before connecting the components. Connect all refrigerant loop components as quickly as possible

to minimize the entry of moisture into system.

- Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without

proper sealing, oil will become moisture saturated and should not be used.

- Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.

Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting require-

ments of SAE J2210 [HFC-134a (R-134a) recycling equipment], or J2209 [HFC-134a (R-134a) recy-

cling equipment], If accidental system discharge occurs, ventilate work area before resuming

service. Additional health and safety information may be obtained from refrigerant and oil manufac-

turers.

- Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.

CONTAMINATED REFRIGERANT

2010 Pathfinder

PRECAUTIONS

HAC-121

< PRECAUTION >

[AUTOMATIC AIR CONDITIONER]

HAC

If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:

• Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into

the atmosphere.

• Explain that recovery of the contaminated refrigerant could damage your service equipment and refrigerant

supply.

• Suggest the customer return the vehicle to the location of previous service where the contamination may

have occurred.

• If you choose to perform the repair, recover the refrigerant using only

dedicated equipment and contain-

ers. Do not recover contaminated refrigerant into your existing service equipment.

If your facility does

not have dedicated recovery equipment, you may contact a local refrigerant product retailer for available ser-

vice. This refrigerant must be disposed of in accordance with all federal and local regulations. In addition,

replacement of all refrigerant system components on the vehicle is recommended.

• If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact NISSAN Cus-

tomer Affairs for further assistance.

Precaution for Service Equipment

INFOID:0000000005256976

MANIFOLD GAUGE SET

Be certain that the gauge face indicates R-134a or 134a. Make sure

the gauge set has 1/2

″

-16 ACME threaded connections for service

hoses. Confirm the set has been used only with refrigerant HFC-

134a (R-134a) along with specified oil.

SERVICE HOSES

Be certain that the service hoses display the markings described

(colored hose with black stripe). All hoses must include positive shut-

off devices (either manual or automatic) near the end of the hoses

opposite the manifold gauge.

SERVICE COUPLERS

Never attempt to connect HFC-134a (R-134a) service couplers to a

CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will

not properly connect to the CFC-12 (R-12) system. However, if an

improper connection is attempted, discharging and contamination

may occur.

SHA533D

RHA272D

Shut-off valve rotation

A/C service valve

Clockwise

Open

Counterclockwise

RHA273D

2010 Pathfinder

HAC-122

< BASIC INSPECTION >

[MANUAL AIR CONDITIONER]

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

How to Perform Trouble Diagnosis For Quick And Accurate Repair

INFOID:0000000005256977

WORK FLOW

LISTEN TO CUSTOMER COMPLAINT

Listen to customer complaint. Get detailed information about the conditions and environment when the symp-

tom occurs.

>> GO TO 2.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 3.

VERIFY THE SYMPTOM WITH OPERATIONAL CHECK

Verify the symptom with operational check. Refer to

HAC-123, "Operational Check"

Can a symptom be duplicated?

YES

>> Go to trouble diagnosis. Refer to

HAC-172, "Symptom Matrix Chart"

>> System OK.

2010 Pathfinder

INSPECTION AND ADJUSTMENT

HAC-123

< BASIC INSPECTION >

[MANUAL AIR CONDITIONER]

HAC

INSPECTION AND ADJUSTMENT

Operational Check

INFOID:0000000005256978

The purpose of the operational check is to confirm that the system operates properly.

CHECKING BLOWER

1. Turn blower control dial clockwise. Blower should operate on low speed.
2. Turn the blower control dial again, and continue checking each blower speed until all speeds are checked.
3. Leave blower on speed 4.
If NG, go to trouble diagnosis procedure for

HAC-147, "Front Blower Motor Diagnosis Procedure"

If OK, continue with next check.

CHECKING DISCHARGE AIR

1. Turn the mode switch to each position.

2. Confirm that discharge air comes out according to the air distribution table. Refer to

HAC-132, "Discharge

Air Flow"

Mode door position is checked in the next step.

If NG, go to trouble diagnosis procedure for

HAC-137, "Mode Door Motor (Front) Diagnosis Procedure"

If OK, continue with next check.

NOTE:

Confirm that the A/C compressor clutch is engaged (sound or visual inspection) and intake door position is at
fresh when the DEF (

) or D/F (

) is selected.

CHECKING RECIRCULATION

1. Press recirculation (

) switch one time. Recirculation indicator should illuminate.

2. Press recirculation (

) switch one more time. Recirculation indicator should go off.

3. Listen for intake door position change (blower sound should change slightly).
If NG, go to trouble diagnosis procedure for

HAC-144, "Intake Door Motor Diagnosis Procedure"

If OK, continue with next check.

NOTE:

Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at fresh

when the DEF or D/F is selected.

CHECKING TEMPERATURE DECREASE

1. Rotate temperature control dial counterclockwise.
2. Check for cold air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation if OK, go to trouble diagnosis procedure for

HAC-173,

"Component Function Check"

. If air mix door motor appears to be malfunctioning, go to

HAC-140, "Air Mix

Door Motor Component Function Check"

If OK, continue with next check.

CHECKING TEMPERATURE INCREASE

1. Rotate temperature control dial clockwise.
2. Check for hot air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for

HAC-181,

"Component Function Check"

. If air mix door motor (front) appears to be malfunctioning, go to

HAC-140, "Air

Mix Door Motor Component Function Check"

If OK, continue with next check.

CHECK A/C SWITCH

1. Press A/C switch with the blower switch ON.
2. A/C switch indicator will turn ON.

• Confirm that the compressor clutch engages (sound or visual inspection).

Conditions

: Engine running and at normal operating temperature

2010 Pathfinder

Content .. 453 454 455 456 ..