Nissan Frontier. Manual — part 1298
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< REMOVAL AND INSTALLATION >
HEATER & COOLING UNIT ASSEMBLY
HEATER & COOLING UNIT ASSEMBLY
Component
INFOID:0000000009478817
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:0000000009478818
REMOVAL
CAUTION:
AWIIA1532GB
1.
High-pressure A/C pipe
2.
Low-pressure A/C pipe
3. Expansion valve
4.
Heater core and evaporator pipes grommet
5.
A/C drain hose grommet
6. A/C drain hose
7.
Heater core pipe mounts
8.
Heater core pipes
9. Heater and cooling unit assembly
Front
HEATER & COOLING UNIT ASSEMBLY
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Before servicing, turn the ignition switch off, disconnect both battery terminals and wait at least 3 min-
utes.
1. Move the two front seats to the rear most position on the seat track.
2. Discharge the refrigerant from the A/C system. Refer to
HA-14, "HFC-134a (R-134a) Service Procedure"
3. Drain the coolant from the engine cooling system. Refer to
CO-12, "Changing Engine Coolant"
(QR25DE),
CO-40, "Changing Engine Coolant"
4. Disconnect the battery negative and positive terminals. Refer to
5. For vehicles equipped with the VQ40DE engine, remove the RH
heater core pipes nut.
6. Disconnect the heater core hoses from the heater core.
7. Disconnect the high- and low-pressure A/C pipes from the
expansion valve.
8. Remove the instrument panel and center console. Refer to
9. Remove the two front floor ducts.
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) harness 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 heater and cooling unit assembly with it attached to the steering member from the vehicle.
CAUTION:
• Use care not to damage the seats and interior trim panels when removing the heater and cooling
unit assembly with it attached to the steering member.
14. Remove the 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.
• After charging the refrigerant, check for leaks. Refer to
HA-18, "Checking of Refrigerant Leaks"
NOTE:
• Fill the engine cooling system with the specified coolant mixture. Refer to
(QR25DE),
CO-40, "Changing Engine Coolant"
• Recharge the A/C system. Refer to
HA-14, "HFC-134a (R-134a) Service Procedure"
.
WJIA1292E
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EVAPORATOR
EVAPORATOR
Removal and Installation
INFOID:0000000009478819
Heater and Cooling Unit Assembly
AWIIA1533ZZ
1.
Center ventilator connector duct
2.
Heater core cover
3. Intake air case
4.
Heater core and evaporator pipes
bracket
5.
Heater core and evaporator pipes grommet 6. Heater core
7.
Upper heater and cooling unit case
8.
Evaporator and expansion valve assembly 9. Lower heater and cooling unit
case
10. Variable blower control / Blower motor
resistor
11. Blower motor
EVAPORATOR
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REMOVAL
1. Remove the front heater and cooling unit assembly. Refer to
2. Separate the heater and cooling unit case.
3. Remove the evaporator and expansion valve assembly.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Do not reuse O-rings.
• Apply A/C to the O-rings on the A/C low-pressure flexible A/C hose and the high-pressure A/C pipe
for installation.
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