Nissan Pathfinder (2011 year). Manual — part 619
VTL-16
< REMOVAL AND INSTALLATION >
FRONT BLOWER MOTOR RESISTOR
FRONT BLOWER MOTOR RESISTOR
Removal and Installation
INFOID:0000000006245373
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
2011 Pathfinder
HEATER & COOLING UNIT ASSEMBLY
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HEATER & COOLING UNIT ASSEMBLY
Component
INFOID:0000000006245374
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
2011 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:0000000006245375
FRONT HEATER AND COOLING UNIT ASSEMBLY
CAUTION:
Before servicing, turn the ignition switch off, disconnect both battery terminals and wait least 3 min-
utes.
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-13, "Changing Engine Coolant"
(VQ40DE),
CO-44, "Changing Engine Coolant"
(VK56DE).
3. Move the 2 front seats to the rearmost position on the seat track.
4. Disconnect the battery negative and positive terminals.
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.
Underfloor rear high- and low-pressure A/C
and heater core pipes
5.
Rear expansion valve
6.
Rear heater and cooling unit assembly
2011 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
12, "Removal and Installation"
9. Remove the two front floor ducts. Refer to
.
10. Remove the steering column. Refer to
.
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
.
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
.
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.
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
• 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-13, "Changing Engine Coolant"
(VQ40DE),
CO-44, "Changing Engine Coolant"
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.
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
• After charging the refrigerant, check for leaks. Refer to
HA-29, "Checking of Refrigerant Leaks"
LJIA0165E
2011 Pathfinder
VTL-20
< REMOVAL AND INSTALLATION >
EVAPORATOR
EVAPORATOR
Removal and Installation for Front Evaporator
INFOID:0000000006245376
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
2011 Pathfinder
EVAPORATOR
VTL-21
< REMOVAL AND INSTALLATION >
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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:0000000006245377
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
2011 Pathfinder
VTL-22
< REMOVAL AND INSTALLATION >
EVAPORATOR
REMOVAL
1. Remove the rear heater and cooling unit assembly from the vehicle. Refer to
.
2. Remove the rear blower motor.
3. Remove the variable blower control (rear).
4. Remove the rear air mix door motor.
5. Remove the rear duct and blend door assembly. Refer to
33, "Removal and Installation"
.
6. Disassemble the rear heater and cooling unit assembly to
remove the rear evaporator.
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 rear high- and low-pressure A/C pipes for installation.
• After charging refrigerant, check for leaks.
WJIA1134E
2011 Pathfinder
EXPANSION VALVE
VTL-23
< REMOVAL AND INSTALLATION >
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EXPANSION VALVE
Removal and Installation for Rear Expansion Valve
INFOID:0000000006245378
REMOVAL
1. Discharge the refrigerant. Refer to
HA-36, "HFC-134a (R-134a) Service Procedure"
.
2. Reposition the third row seat out of the way.
3. Remove the luggage side lower finisher RH access door.
4. Disconnect the rear high- and low-pressure A/C pipes from the rear expansion valve.
CAUTION:
Cap or wrap the A/C refrigerant pipe ends with a suitable material such as vinyl tape to avoid the
entry of air and contaminants.
5. Remove the expansion valve.
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 rear expansion valve and the rear high- and low-pressure A/C
pipes for installation.
• After charging refrigerant, check for leaks.
Expansion valve bolts
: Refer to
A/C refrigerant pipe to expansion valve bolt
: Refer to
2011 Pathfinder
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