Nissan Titan A60. Manual — part 623

INSUFFICIENT HEATING

HAC-175

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

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INSUFFICIENT HEATING

Component Function Check

INFOID:0000000006164793

SYMPTOM: Insufficient heating

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE

1. Turn the blower control dial to low speed.

2. Turn the temperature control dial clockwise to maximum heat

3. Check for hot air at discharge air outlets.
Can this symptom be duplicated?

YES

>> GO TO 2.

NO

>> Perform complete system operational check. Refer to

HAC-99, "Operational Check"

.

2.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> If equipped with NAVI, GO TO 3.

>> If not equipped with NAVI, GO TO 4.

3.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis. Refer to

HAC-114, "Front Air Control Self-Diagnosis"

.

Is the inspection results normal?

YES

>> GO TO 4.

NO

>> Refer to

HAC-166, "Symptom Matrix Chart"

.

4.

CHECK ENGINE COOLING SYSTEM

1. Check for proper engine coolant level. Refer to

CO-10, "Inspection"

.

2. Check hoses for leaks or kinks.

3. Check radiator cap. Refer to

CO-10, "Inspection"

.

4. Check for air in cooling system.

>> GO TO 5.

5.

CHECK AIR MIX DOOR OPERATION

Check the operation of the air mix door.
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Check the air mix door motor circuit. Refer to

HAC-120, "Air Mix Door Motor Component Function

Check"

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6.

CHECK AIR DUCTS

Check for disconnected or leaking air ducts.
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair all disconnected or leaking air ducts.

7.

CHECK HEATER HOSE TEMPERATURES

1. Start engine and warm it up to normal operating temperature.

2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be

warm.

Is the inspection result normal?

YES

>> Hot inlet hose and a warm outlet hose: GO TO 8.

NO

>> • Inlet hose cold: GO TO 11.

• Both hoses warm: GO TO 9.

HAC-176

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

INSUFFICIENT HEATING

8.

CHECK ENGINE COOLANT SYSTEM

Check engine control temperature sensor. Refer to

EC-177, "Component Inspection"

.

Is the inspection result normal?

YES

>> System OK.

NO

>> Repair or replace as necessary. Retest.

9.

CHECK HEATER HOSES

Check heater hoses for proper installation.
Is the inspection result normal?

YES

>> System OK.

NO

>> 1. Back flush heater core.

2. Drain the water from the system.

3. Refill system with new engine coolant. Refer to

CO-11, "Changing Engine Coolant"

.

4. GO TO 10 to retest.

10.

CHECK HEATER HOSE TEMPERATURES

1. Start engine and warm it up to normal operating temperature.

2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be

warm.

Is the inspection result normal?

YES

>> System OK.

NO

>> Replace heater core. Refer to

VTL-15, "Removal and Installation"

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11.

CHECK WATER VALVE

Check the operation of the water valve. Refer to

HAC-142, "Water Valve Diagnosis Procedure"

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Is the inspection result normal?

YES

>> System OK.

NO

>> Replace water valve.

NOISE

HAC-177

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

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NOISE

Component Function Check

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SYMPTOM: Noise

INSPECTION FLOW

*1

HAC-99, "Operational Check"

*2

EM-13, "Checking Drive Belts"

*3

EM-13, "Checking Drive Belts"

*4

HA-43, "Removal and Installation for
Expansion Valve"

*5

HA-33, "Removal and Installation for
Compressor Clutch"

*6

HA-33, "Removal and Installation for
Compressor Clutch"

*7

HA-32, "Removal and Installation for
Compressor"

*8

HA-32, "Removal and Installation for
Compressor"

*9

HA-41, "Removal and Installation for
Condenser"

AWIIA1001GB

HAC-178

< PRECAUTION >

[MANUAL A/C (TYPE 1)]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

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

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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.

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

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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 Refrigerant Recovery/

Recycling Recharging 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) recy-

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

service. Additional health and safety information may be obtained from refrigerant and oil manufac-

turers.

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

CONTAMINATED REFRIGERANT