Nissan Pathfinder (2012 year). Manual - part 609

VARIABLE BLOWER CONTROL

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Removal

1. Disconnect the variable blower control (front) electrical connector.
2. Remove the 2 screws and  the variable blower control (front).

Installation

Installation is in the reverse order of removal.

REAR VARIABLE BLOWER CONTROL

Removal

1. Remove the rear heater and cooling unit assembly. Refer to 

VTL-18, "Removal and Installation"

.

2. Disconnect the variable blower control (rear) electrical connector.
3. Remove the 2 screws and the variable blower control (rear).

Installation

Installation is in the reverse order of removal.

August 2012

2012 Pathfinder

VTL-16

< REMOVAL AND INSTALLATION >

FRONT BLOWER MOTOR RESISTOR

FRONT BLOWER MOTOR RESISTOR

Removal and Installation

INFOID:0000000007356277

Blower Motor Resistor - Heater and Cooling Unit Assembly

REMOVAL

1. Disconnect the blower motor resistor electrical connector.
2. Remove the 2 screws and the blower motor resistor.

INSTALLATION

Installation is in the reverse order of removal.

WJIA1312E

1.

Heater and cooling unit assembly

2.

Intake door motor

3.

Air mix door motor

4.

Blower motor resistor

5.

Mode door motor

August 2012

2012 Pathfinder

HEATER & COOLING UNIT ASSEMBLY

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HEATER & COOLING UNIT ASSEMBLY

Component

INFOID:0000000007356278

Front Heater and Cooling Unit Assembly

AWIIA1474ZZ

1.

Front high-pressure A/C pipe

2.

Front low-pressure A/C pipe

3.

Front expansion valve

4.

Front heater core and evaporator 
pipes grommet

5.

Front A/C drain hose grommet 6.

Front A/C drain hose

7.

Front heater core pipe mounts

8.

Front heater core pipes

9.

Front heater and cooling unit assembly

Vehicle front

August 2012

2012 Pathfinder

VTL-18

< REMOVAL AND INSTALLATION >

HEATER & COOLING UNIT ASSEMBLY

Rear Heater and Cooling Unit Assembly

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

Removal and Installation

INFOID:0000000007356279

FRONT HEATER AND COOLING UNIT ASSEMBLY

Removal

CAUTION:

Before servicing, turn the ignition switch off, disconnect both battery terminals, then wait at least

three minutes.

1. Discharge the refrigerant from the A/C system. Refer to 

HA-36, "HFC-134a (R-134a) Service Procedure"

.

2. Drain the coolant from the engine cooling system. Refer to 

CO-12, "Changing Engine Coolant"

 (VQ40DE),

CO-42, "Changing Engine Coolant"

 (VK56DE).

3. Move the front seats to the rearmost position on the seat track.
4. Disconnect the battery negative and positive terminals, then wait at least three minutes.

AWIIA1475ZZ

1.

Rear high- and low-pressure A/C pipes

2.

Rear heater core hoses

3.

Rear high- and low-pressure A/C pipes 
cover

4.

Under floor rear high- and low-pressure A/C 
and heater core pipes

5.

Rear expansion valve

6.

Rear heater and cooling unit assembly

August 2012

2012 Pathfinder

HEATER & COOLING UNIT ASSEMBLY

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5. Remove the front heater core pipes RH nut.
6. Disconnect the front heater core hoses from the front heater

core.

7. Disconnect the high- and low-pressure A/C pipes from the front

expansion valve.

8. Remove the instrument panel and center console. Refer to 

IP-

12, "Removal and Installation"

.

9. Remove the two front floor ducts. Refer to 

VTL-32, "Compo-

nent"

.

10. Remove the steering column. Refer to 

ST-17, "Removal and

Installation"

.

11. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse

block (SMJ) electrical connectors. Refer to 

PG-39, "Harness Layout"

.

12. Remove the covers then remove the three steering member bolts from each side to disconnect the steer-

ing member from the vehicle body. Refer to 

IP-11, "Exploded View"

.

13. Remove the front heater and cooling unit assembly with it attached to the steering member, from the vehi-

cle.

CAUTION:

Use care not to damage the seats and interior trim panels when removing the front heater and

cooling unit assembly with it attached to the steering member.

14. Remove the front heater and cooling unit assembly from the steering member.

Installation

Installation is in the reverse order of removal.

• Fill the engine cooling system with the specified coolant mixture. Refer to 

CO-12, "Changing Engine Cool-

ant"

 (VQ40DE), 

CO-42, "Changing Engine Coolant"

 (VK56DE).

• Recharge the A/C system. Refer to 

HA-36, "HFC-134a (R-134a) Service Procedure"

.

CAUTION:

• Do not reuse O-rings.

• Apple A/C oil to the O-ring of the low-pressure A/C pipe and high-pressure A/C pipe installation.

Refer to 

HA-34, "Component"

.

• After charging the refrigerant, check for leaks. Refer to 

HA-29, "Checking of Refrigerant Leaks"

.

REAR HEATER AND COOLING UNIT ASSEMBLY

Removal

1. Discharge the refrigerant from the A/C system. Refer to 

HA-36, "HFC-134a (R-134a) Service Procedure"

.

2. Drain the coolant from the engine cooling system. Refer to 

CO-12, "Changing Engine Coolant"

 (VQ40DE),

CO-42, "Changing Engine Coolant"

 (VK56DE).

3. Remove the luggage side lower and upper finisher RH. Refer to 

INT-25, "Removal and Installation"

.

4. Disconnect the rear heater core hoses from the rear heater core.
5. Disconnect the rear A/C high- and low-pressure A/C pipes from the rear expansion valve.
6. Disconnect the following electrical connectors:

• Rear blower motor

• Rear variable blower control (rear)

• Rear air mix door motor

7. Disconnect the ducts from the rear heater and cooling unit assembly.
8. Remove the 3 bolts and the rear heater and cooling unit assembly.

Installation

Installation is in the reverse order of removal.

• Fill the engine cooling system with the specified coolant mixture. Refer to 

CO-12, "Changing Engine Cool-

ant"

 (VQ40DE), 

CO-42, "Changing Engine Coolant"

 (VK56DE).

• Recharge the A/C system. Refer to 

HA-36, "HFC-134a (R-134a) Service Procedure"

.

CAUTION:

• Do not reuse O-rings.

• Apply A/C oil to the O-ring of the low-pressure A/C pipe and high-pressure A/C pipe for installation.

Refer to 

HA-34, "Component"

.

LJIA0165E

August 2012

2012 Pathfinder

VTL-20

< REMOVAL AND INSTALLATION >

HEATER & COOLING UNIT ASSEMBLY

• After charging the refrigerant, check for leaks. Refer to 

HA-29, "Checking of Refrigerant Leaks"

.

August 2012

2012 Pathfinder

EVAPORATOR

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EVAPORATOR

Removal and Installation for Front Evaporator

INFOID:0000000007356280

Front Heater and Cooling Unit Assembly

AWIIA1533ZZ

1.

Center ventilator connector duct

2.

Front heater core cover

3.

Intake air case

4.

Front heater core and evaporator 
pipes bracket

5.

Front heater core and evaporator 
pipes grommet

6.

Front heater core

7.

Upper heater and cooling unit case

8.

Front evaporator and expansion 
valve assembly

9.

Lower heater and cooling 
unit case

10. Variable blower control (front)

11. Blower motor

August 2012

2012 Pathfinder

VTL-22

< REMOVAL AND INSTALLATION >

EVAPORATOR

REMOVAL

1. Remove the front heater and cooling unit assembly. Refer to 

VTL-18, "Removal and Installation"

.

2. Separate the heater and cooling unit case.
3. Remove the front evaporator and expansion valve assembly.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Do not reuse O-rings.

• Apply A/C oil to the O-rings on the front A/C low-pressure flexible A/C hose and the front high-pres-

sure A/C pipe for installation.

Removal and Installation for Rear Evaporator

INFOID:0000000007356281

Rear Heater and Cooling Unit Assembly

AWIIA1397ZZ

1.

Front cover

2.

Rear evaporator and heater core case

3.

Rear evaporator

4.

Side cover

5.

Rear heater core

6.

Rear blower motor

7.

Blower motor case

8.

Variable blower control (rear)

Front

August 2012

2012 Pathfinder