Nissan Pathfinder (2006 year). Instruction — part 59
HEATER & COOLING UNIT ASSEMBLY
ATC-137
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ATC
2006 Pathfinder
Rear Heater and Cooling Unit Assembly
Removal and Installation
EJS004PU
FRONT HEATER AND COOLING UNIT ASSEMBLY
Removal
1.
Discharge the refrigerant from the A/C system. Refer to
ATC-154, "Discharging Refrigerant"
.
2.
Drain the coolant from the engine cooling system. Refer to
MA-13, "DRAINING ENGINE COOLANT"
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
ATC-138
HEATER & COOLING UNIT ASSEMBLY
2006 Pathfinder
3.
Remove the front heater core pipes RH nut.
4.
Disconnect the front heater core hoses from the front heater
core.
5.
Disconnect the high- and low-pressure A/C pipes from the front
expansion valve.
6.
Move the two front seats to the rearmost position on the seat
track.
7.
Remove the instrument panel and console panel. Refer to
8.
Remove the two front floor ducts.
9.
Remove the steering column. Refer to
10. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse
block (SMJ) electrical connectors. Refer to
.
11. Remove the covers then remove the three steering member bolts from each side to disconnect the steer-
ing member from the vehicle body.
12. 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.
13. 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
●
After charging the refrigerant, check for leaks. Refer to
ATC-170, "Checking for Refrigerant Leaks"
.
NOTE:
●
Fill the engine cooling system with the specified coolant mixture. Refer to
.
●
Recharge the A/C system. Refer to
ATC-154, "Evacuating System and Charging Refrigerant"
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1.
Discharge the refrigerant from the A/C system. Refer to
ATC-154, "Discharging Refrigerant"
2.
Drain the coolant from the engine cooling system. Refer to
MA-13, "DRAINING ENGINE COOLANT"
3.
Remove the luggage side lower finisher RH. Refer to
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 blower motor resistor
●
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.
LJIA0165E
HEATER & COOLING UNIT ASSEMBLY
ATC-139
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ATC
2006 Pathfinder
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
.
●
After charging the refrigerant, check for leaks. Refer to
ATC-170, "Checking for Refrigerant Leaks"
.
NOTE:
●
Fill the engine cooling system with the specified coolant mixture. Refer to
●
Recharge the A/C system. Refer to
ATC-140
HEATER CORE
2006 Pathfinder
HEATER CORE
PFP:27140
Components
EJS004PV
Front Heater and Cooling Unit Assembly
Rear Heater and Cooling Unit Assembly
LJIA0167E
1.
Front heater core and evaporator pipe
bracket
2.
Front heater core
3.
Front heater and cooling unit assembly
4.
Front heater core cover
LJIA0168E
1.
Rear heater and cooling unit assembly
2.
Rear blower motor
3.
Rear heater core bracket
4.
Rear heater core
HEATER CORE
ATC-141
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ATC
2006 Pathfinder
Removal and Installation
EJS004PW
FRONT HEATER CORE
Removal
1.
Remove the front heater and cooling unit assembly. Refer to
ATC-137, "FRONT HEATER AND COOLING
2.
Remove the three screws and remove the front heater core cover.
3.
Remove the front heater core and evaporator pipe bracket.
4.
Remove the front heater core.
NOTE:
If the in-cabin microfilters are contaminated from coolant leaking
from the front heater core, replace the in-cabin microfilters with
new ones before installing the new front heater core.
Installation
Installation is in the reverse order of removal.
REAR HEATER CORE
Removal
1.
Partially drain the engine cooling system. Refer to
MA-13, "DRAINING ENGINE COOLANT"
.
2.
Remove the rear heater and cooling unit assembly. Refer to
ATC-138, "REAR HEATER AND COOLING
3.
Remove the rear heater core bracket.
4.
Remove the heater core.
Installation
Installation is in the reverse order of removal.
LJIA0134E
ATC-142
HEATER PUMP
2006 Pathfinder
HEATER PUMP
PFP:92264
Removal and Installation
EJS004PX
Heater Pump
REMOVAL
1.
Partially drain the engine cooling system. Refer to
MA-13, "DRAINING ENGINE COOLANT"
2.
Disconnect the heater pump electrical connector.
3.
Disconnect the two heater hoses.
4.
Remove the heater pump from the bracket securing the heater pump to the cowl top.
CAUTION:
Do not disassemble the heater pump, replace the heater pump as an assembly.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
●
The heater pump rubber mount must be fully seated on the bracket.
●
Do not disassemble the heater pump, replace the heater pump as an assembly.
LBIA0414E
1.
Cowl top
2.
Heater pump electrical connector
3.
Heater pump
4.
Heater hose and clamp
5.
Heater hose and clamp
INTAKE DOOR MOTOR
ATC-143
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ATC
2006 Pathfinder
INTAKE DOOR MOTOR
PFP:27730
Removal and Installation
EJS004PY
Intake Door Motor - Front Heater and Cooling Unit Assembly
REMOVAL
1.
Remove the front heater and cooling unit assembly. Refer to
ATC-137, "FRONT HEATER AND COOLING
2.
Remove the steering member from the front heater and cooling unit assembly.
3.
Disconnect the intake door motor electrical connector.
4.
Remove the three screws and remove the intake door motor.
INSTALLATION
Installation is in the reverse order of removal.
LBIA0415E
1.
Front heater and cooling unit assembly
2.
Intake door motor
3.
Air mix door motor (passenger)
4.
Variable blower control
5.
Air mix door motor (driver)
6.
Mode door motor
ATC-144
MODE DOOR MOTOR
2006 Pathfinder
MODE DOOR MOTOR
PFP:27731
Removal and Installation
EJS004PZ
Mode Door Motor - Front Heater and Cooling Unit Assembly
REMOVAL
1.
Remove the instrument panel side finisher. Refer to
EI-28, "LOWER DASH SIDE FINISHER"
2.
Remove the lower instrument cover. Refer to
IP-15, "LOWER INSTRUMENT PANEL RH AND LOWER
3.
Disconnect the mode door motor electrical connector.
4.
Remove the three screws and remove the mode door motor.
INSTALLATION
Installation is in the reverse order of removal.
LBIA0415E
1.
Front heater and cooling unit assembly
2.
Intake door motor
3.
Air mix door motor (passenger)
4.
Variable blower control
5.
Air mix door motor (driver)
6.
Mode door motor
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