Nissan Pathfinder (2010 year). Manual - part 646

VARIABLE BLOWER CONTROL

VTL-15

< ON-VEHICLE REPAIR >

C

D

E

F

G

H

J

K

L

M

A

B

VTL

N

O

P

Removal

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

Installation

Installation is in the reverse order of removal.

2010 Pathfinder

VTL-16

< ON-VEHICLE REPAIR >

FRONT BLOWER MOTOR RESISTOR

FRONT BLOWER MOTOR RESISTOR

Removal and Installation

INFOID:0000000005259231

Blower Motor Resistor - Heater and Cooling Unit Assembly

REMOVAL

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

2010 Pathfinder

HEATER & COOLING UNIT ASSEMBLY

VTL-17

< ON-VEHICLE REPAIR >

C

D

E

F

G

H

J

K

L

M

A

B

VTL

N

O

P

HEATER & COOLING UNIT ASSEMBLY

Component

INFOID:0000000005259232

Front Heater and Cooling Unit Assembly

WJIA1402E

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

2010 Pathfinder

VTL-18

< ON-VEHICLE REPAIR >

HEATER & COOLING UNIT ASSEMBLY

Rear Heater and Cooling Unit Assembly

Removal and Installation

INFOID:0000000005259233

FRONT HEATER AND COOLING UNIT ASSEMBLY

Removal

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

HA-37, "HFC-134a (R-134a) Service Procedure"

.

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

CO-12, "Changing Engine Coolant"

 (VQ40DE),

CO-40, "Changing Engine Coolant"

 (VK56DE).

3. Move the two front seats to the rearmost position on the seat track.
4. Disconnect the battery negative and positive terminals.

WJIA1403E

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.

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

5.

Rear expansion valve

6.

Rear heater and cooling unit assembly

2010 Pathfinder

HEATER & COOLING UNIT ASSEMBLY

VTL-19

< ON-VEHICLE REPAIR >

C

D

E

F

G

H

J

K

L

M

A

B

VTL

N

O

P

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.
10. Remove the steering column. Refer to 

ST-19, "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 Lay-

out"

.

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.

• Use suitable plugs on the heater core pipes to prevent coolant leakage.

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

Installation

Installation is in the reverse order of removal.

CAUTION:

• Replace the O-ring of the low-pressure A/C pipe and high-pressure A/C pipe with a new one, and

apply compressor oil to the O-ring for installation. Refer to 

HA-34, "Component"

.

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

HA-29, "Checking of Refrigerant Leaks"

.

NOTE:

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

CO-12, "Changing Engine Cool-

ant"

 (VQ40DE), 

CO-40, "Changing Engine Coolant"

 (VK56DE).

• Recharge the A/C system. Refer to 

HA-37, "HFC-134a (R-134a) Service Procedure"

.

REAR HEATER AND COOLING UNIT ASSEMBLY

Removal

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

HA-37, "HFC-134a (R-134a) Service Procedure"

.

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

CO-12, "Changing Engine Coolant"

 (VQ40DE),

CO-40, "Changing Engine Coolant"

 (VK56DE).

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

INT-22, "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 three bolts to remove the rear heater and cooling unit assembly.

Installation

Installation is in the reverse order of removal.

CAUTION:

• Replace the O-ring of the low-pressure A/C pipe and high-pressure A/C pipe with a new one, and

apply compressor oil to the O-ring for installation. Refer to 

HA-34, "Component"

.

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

HA-29, "Checking of Refrigerant Leaks"

.

NOTE:

LJIA0165E

2010 Pathfinder

VTL-20

< ON-VEHICLE REPAIR >

HEATER & COOLING UNIT ASSEMBLY

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

CO-12, "Changing Engine Cool-

ant"

 (VQ40DE), 

CO-40, "Changing Engine Coolant"

 (VK56DE).

• Recharge the A/C system. Refer to 

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2010 Pathfinder

EVAPORATOR

VTL-21

< ON-VEHICLE REPAIR >

C

D

E

F

G

H

J

K

L

M

A

B

VTL

N

O

P

EVAPORATOR

Removal and Installation for Front Evaporator

INFOID:0000000005259234

Front Heater and Cooling Unit Assembly

REMOVAL

LJIA0178E

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 expansion valve

9.

Front evaporator

10. Lower heater and cooling unit case

11. Variable blower control (front)

12. Blower motor

2010 Pathfinder

VTL-22

< ON-VEHICLE REPAIR >

EVAPORATOR

1. Remove the front heater core. Refer to 

VTL-26, "Removal and Installation"

.

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

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Replace the O-rings on the front A/C low-pressure flexible A/C hose and the front high-pressure A/C

pipe with new ones. Apply compressor oil to the O-rings for installation.

Removal and Installation for Rear Evaporator

INFOID:0000000005259235

Rear Heater and Cooling Unit Assembly

REMOVAL

AWIIA0647ZZ

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

2010 Pathfinder