Nissan Titan A60. Manual - part 624

PRECAUTIONS

HAC-179

< PRECAUTION >

[MANUAL A/C (TYPE 1)]

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If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:

• Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into

the atmosphere.

• Explain that recovery of the contaminated refrigerant could damage your service equipment and refrigerant

supply.

• Suggest the customer return the vehicle to the location of previous service where the contamination may

have occurred.

• If you choose to perform the repair, recover the refrigerant using only dedicated equipment and contain-

ers. Do not recover contaminated refrigerant into your existing service equipment. If your facility does

not have dedicated recovery equipment, you may contact a local refrigerant product retailer for available ser-

vice. This refrigerant must be disposed of in accordance with all federal and local regulations. In addition,

replacement of all refrigerant system components on the vehicle is recommended.

• If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact NISSAN Cus-

tomer Affairs for further assistance.

Precaution for Service Equipment

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MANIFOLD GAUGE SET

Be certain that the gauge face indicates R-134a or 134a. Make sure

the gauge set has 1/2

″-16 ACME threaded connections for service

hoses. Confirm the set has been used only with refrigerant HFC-

134a (R-134a) along with specified oil.

SERVICE HOSES

Be certain that the service hoses display the markings described

(colored hose with black stripe). All hoses must include positive shut-

off devices (either manual or automatic) near the end of the hoses

opposite the manifold gauge.

SERVICE COUPLERS

Never attempt to connect HFC-134a (R-134a) service couplers to a

CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will

not properly connect to the CFC-12 (R-12) system. However, if an

improper connection is attempted, discharging and contamination

may occur.

SHA533D

RHA272D

Shut-off valve rotation

A/C service valve

Clockwise

Open

Counterclockwise

Close

RHA273D

HAC-180

< BASIC INSPECTION >

[MANUAL A/C (TYPE 2)]

MANUAL A/C IDENTIFICATION TABLE

BASIC INSPECTION

MANUAL A/C IDENTIFICATION TABLE

Application Table

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Manual A/C Type

Description

Visual Identification

Manual A/C (Type 1)

Two Control Dial System

Manual A/C (Type 2)

Three Control Dial System 

[with variable blower control 

(VBC)]

AWIIA0481ZZ

AWIIA0478ZZ

DIAGNOSIS AND REPAIR WORKFLOW

HAC-181

< BASIC INSPECTION >

[MANUAL A/C (TYPE 2)]

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DIAGNOSIS AND REPAIR WORKFLOW

How to Perform Trouble Diagnosis For Quick And Accurate Repair

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WORK FLOW

1.

LISTEN TO CUSTOMER COMPLAINT

Listen to customer complaint. Get detailed information about the conditions and environment when the symp-

tom occurs.

>> GO TO 2

2.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 3.

3.

VERIFY THE SYMPTOM WITH OPERATIONAL CHECK

Verify the symptom with operational check. Refer to 

HAC-182, "Operational Check"

. 

>> GO TO 4

4.

GO TO APPROPRIATE TROUBLE DIAGNOSIS

Go to appropriate trouble diagnosis. Refer to 

HAC-243, "Symptom Matrix Chart"

.

>> GO TO 5.

5.

REPAIR OR REPLACE

Repair or replace the specific parts.

>> GO TO 7

6.

FINAL CHECK

Final check.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 4

HAC-182

< BASIC INSPECTION >

[MANUAL A/C (TYPE 2)]

INSPECTION AND ADJUSTMENT

INSPECTION AND ADJUSTMENT

Operational Check

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The purpose of the operational check is to confirm that the system operates properly.

CHECKING BLOWER

1. Rotate the blower control dial clockwise once, blower should operate on low speed.
2. Rotate the blower control dial again, and continue checking blower speed until all speeds are checked.
3. Leave blower on maximum speed. 
If NG, go to trouble diagnosis procedure for 

HAC-212, "Front Blower Motor Diagnosis Procedure"

.

If OK, continue with next check.

CHECKING DISCHARGE AIR

1. Rotate MODE control dial to each position and the DEF

 mode.

2. Confirm that discharge air comes out according to the air distribution table. Refer to 

HAC-191, "Discharge

Air Flow"

.

Mode door position is checked in the next step.

If NG, go to trouble diagnosis procedure for 

HAC-197, "Mode Door Motor Diagnosis Procedure"

.

If OK, continue the check.

NOTE:

Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at

fresh when the DEF or D/F is selected.

CHECKING RECIRCULATION ( ,   ONLY)

1. Press recirculation (

) switch one time. Recirculation indicator should illuminate.

2. Press recirculation (

) switch one more time. Recirculation indicator should go off.

3. Listen for intake door position change (blower sound should change slightly).
If NG, go to trouble diagnosis procedure for 

HAC-206, "Intake Door Motor Diagnosis Procedure"

.

If OK, continue the check.

NOTE:

Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at fresh
when the DEF or D/F is selected. REC (

) is not allowed in DEF (

) D/F (

) or FOOT (

).

CHECKING TEMPERATURE DECREASE

1. Rotate temperature control dial counterclockwise until maximum cold.
2. Check for cold air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for 

HAC-244,

"Component Function Check"

. If air mix door motor appears to be malfunctioning, go to 

HAC-202, "Air Mix

Door Motor Diagnosis Procedure"

. 

If OK, continue the check.

CHECKING TEMPERATURE INCREASE

1. Rotate temperature control dial clockwise until maximum hot.
2. Check for hot air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for 

HAC-252,

"Component Function Check"

. If air mix door motor appears to be malfunctioning, go to 

HAC-202, "Air Mix

Door Motor Diagnosis Procedure"

. 

If OK, continue with next check.

CHECK A/C SWITCH

1. Press A/C switch.
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Confirm that the compressor clutch engages (sound or visual inspection).

NOTE:

If current mode setting is DEF or D/F, compressor clutch will already be engaged and cannot be turned off.

Conditions

: Engine running and at normal operating temperature