Nissan Titan. Manual — part 652

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VENTILATION, HEATER & AIR CONDITIONER

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SECTION

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CONTENTS

VENTILATION SYSTEM

PRECAUTION . . . . . . . . . . . ...

2

PRECAUTIONS . . . . . . . . . . . . ...

2

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" . . . . . . . . . . . . . . . . ...

2

Precaution for Working with HFC-134a (R-134a) . ..

2

Precaution for Procedure without Cowl Top Cover . ..

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Precaution for Work . . . . . . . . . . . . ..

3

PREPARATION . . . . . . . . . . .

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PREPARATION . . . . . . . . . . . . ...

4

Special Service Tool . . . . . . . . . . . .....

4

Commercial Service Tool . . . . . . . . . . ..

4

SYSTEM DESCRIPTION . . . . . . . ..

5

IN-CABIN MICROFILTER . . . . . . . . ...

5

Description . . . . . . . . . . . . . . . ....

5

PERIODIC MAINTENANCE . . . . . . ..

6

IN-CABIN MICROFILTER . . . . . . . . ...

6

Removal and Installation . . . . . . . . . . ...

6

REMOVAL AND INSTALLATION . . . .

8

CONTROL UNIT . . . . . . . . . . . . ..

8

Removal and Installation . . . . . . . . . . ...

8

IN-VEHICLE SENSOR . . . . . . . . . .

9

Removal and Installation . . . . . . . . . . ...

9

OPTICAL SENSOR . . . . . . . . . . .

10

Removal and Installation . . . . . . . . . . .

10

INTAKE SENSOR . . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

11

BLOWER MOTOR . . . . . . . . . . .

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Removal and Installation . . . . . . . . . . .

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HEATER & COOLING UNIT ASSEMBLY . .

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Removal and Installation . . . . . . . . . . .

13

HEATER CORE . . . . . . . . . . . . .

15

Removal and Installation . . . . . . . . . . .

15

DEFROSTER DOOR MOTOR . . . . . . ..

17

Removal and Installation . . . . . . . . . . .

17

INTAKE DOOR MOTOR . . . . . . . . ...

18

Removal and Installation . . . . . . . . . . .

18

MODE DOOR MOTOR . . . . . . . . . ..

19

Removal and Installation . . . . . . . . . . .

19

AIR MIX DOOR MOTOR . . . . . . . . ...

20

Removal and Installation . . . . . . . . . . .

20

VARIABLE BLOWER CONTROL . . . . . .

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Removal and Installation . . . . . . . . . . .

22

BLOWER FAN RESISTOR . . . . . . . ...

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Removal and Installation . . . . . . . . . . .

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DUCTS AND GRILLES . . . . . . . . . .

24

Component . . . . . . . . . . . . . . . ..

24

Removal and Installation . . . . . . . . . . .

25

EVAPORATOR . . . . . . . . . . . . .

27

Removal and Installation for Evaporator and Ex-
pansion Valve Assembly . . . . . . . . . . .

27

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< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

INFOID:0000000009882371

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution for Working with HFC-134a (R-134a)

INFOID:0000000009882372

WARNING:

• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants

are mixed compressor failure is likely to occur. Refer to

HA-4, "Contaminated Refrigerant"

. To deter-

mine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use the recovery/recycling

equipment and refrigerant identifier.

• Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If

oil other than that specified is used, compressor failure is likely to occur.

• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following

handling precautions must be observed:

- When removing refrigerant components from a vehicle, immediately cap (seal) the component to

minimize the entry of moisture from the atmosphere.

- When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just

before connecting the components. Connect all refrigerant loop components as quickly as possible

to minimize the entry of moisture into system.

- Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without

proper sealing, oil will become moisture saturated and should not be used.

- Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.

Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting require-

ments of SAE J2210 [HFC-134a (R-134a) recycling equipment], or J2209 [HFC-134a (R-134a) recovery

equipment]. If accidental system discharge occurs, ventilate work area before resuming service.

Additional health and safety information may be obtained from refrigerant and oil manufacturers.

- Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.

PRECAUTIONS

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< PRECAUTION >

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Precaution for Procedure without Cowl Top Cover

INFOID:0000000009882373

When performing the procedure after removing cowl top cover, cover

the lower end of windshield with urethane, etc.

Precaution for Work

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• When removing or disassembling each component, be careful not to damage or deform it. If a component

may be subject to interference, be sure to protect it with a shop cloth.

• When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component

with a shop cloth or vinyl tape to protect it.

• Protect the removed parts with a shop cloth and prevent them from being dropped.

• Replace a deformed or damaged clip.

• If a part is specified as a non-reusable part, always replace it with a new one.

• Be sure to tighten bolts and nuts securely to the specified torque.

• After installation is complete, be sure to check that each part works properly.

• Follow the steps below to clean components:

- Water soluble dirt:

• Dip a soft cloth into lukewarm water, wring the water out of the cloth and wipe the dirty area.

• Then rub with a soft, dry cloth.

- Oily dirt:

• Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%) and wipe the dirty

area.

• Then dip a cloth into fresh water, wring the water out of the cloth and wipe the detergent off.

• Then rub with a soft, dry cloth.

- Do not use organic solvent such as thinner, benzene, alcohol or gasoline.

- For genuine leather seats, use a genuine leather seat cleaner.

PIIB3706J

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< PREPARATION >

PREPARATION

PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000009882375

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Commercial Service Tool

INFOID:0000000009882376

Tool number
(Kent-Moore No.)
Tool name

Description

—

(J-46534)
Trim tool set

Removing trim components

AWJIA0483ZZ

Tool name

Description

Power tool

Loosening nuts, screws and bolts

PIIB1407E