Nissan Frontier. Manual - part 884

HAC-90

< BASIC INSPECTION >

[MANUAL A/C (TYPE 1)]

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

HAC-116, "Front Blower Motor Diagnosis Procedure"

.

If OK, continue with next check.

CHECKING DISCHARGE AIR

Press each mode switch and confirm that discharge air comes out according to the air distribution table. Refer

tot 

HAC-96, "Discharge Air Flow"

.

Mode door position is checked in the next step.

If NG, go to trouble diagnosis procedure for 

HAC-104, "Mode Door Motor Diagnosis Procedure"

.

If OK, continue with next check.

NOTE:

Confirm that the A/C 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

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-113, "Intake Door Motor Diagnosis Procedure"

.

If OK, continue with next 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 TEMPERATURE DECREASE

1. Rotate temperature control dial counterclockwise.
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-143,

"Component Function Check"

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

HAC-108, "Air Mix

Door Motor Component Function Check"

.

If OK, continue with next check.

CHECKING TEMPERATURE INCREASE

1. Rotate temperature control dial clockwise.
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-151,

"Component Function Check"

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

HAC-108, "Air

Mix Door Motor Component Function Check"

.

If OK, continue with next check.

CHECK A/C SWITCH

1. Press A/C switch with the blower switch ON.
2. A/C switch indicator will turn ON.

• Confirm that the compressor clutch engages (sound or visual inspection).

If NG, go to trouble diagnosis procedure for 

HAC-121, "Magnet Clutch Diagnosis Procedure"

.

If OK, continue with next check.

Conditions

: Engine running and at normal operating temperature

MANUAL A/C IDENTIFICATION TABLE

HAC-91

< SYSTEM DESCRIPTION >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

SYSTEM DESCRIPTION

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 

[with variable blower control 

(VBC)]

Manual A/C (Type 2)

Three Control Dial System 

[without variable blower con-

trol (VBC)]

AWIIA0481ZZ

AWIIA1228ZZ

HAC-92

< SYSTEM DESCRIPTION >

[MANUAL A/C (TYPE 1)]

FUNCTION INFORMATION

FUNCTION INFORMATION

Component Part Location

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ENGINE COMPARTMENT

WJIA1489E

FUNCTION INFORMATION

HAC-93

< SYSTEM DESCRIPTION >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

PASSENGER COMPARTMENT

⇒

:Front

1.

Front air control M50, M59

2.

Intake sensor M146

3.

Intake door motor M58

4.

Variable blower control M121

5.

Mode door motor M142

6.

Air mix door motor M147

AWIIA1198ZZ