Infiniti G35 (V35) Sedan. Manual - part 759

HAC-8

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

INSPECTION AND ADJUSTMENT

Without rear ventilation

With rear ventilation

When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Wind dis-
tribution ratio set becomes that of initial condition.

Inlet Port Memory Function

When ignition switch is turned from OFF to ON, inlet port can be set to AUTO or manual.

Operating procedures for this trimmer are as follows:

1.

Begin self-diagnosis STEP-5 mode. Refer to 

HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION

TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

.

2.

Turn fan control dial clockwise to set system in auxiliary mode.

3.

Press intake switch as desired.

JSIIA0110GB

JSIIA0061GB

LED status of 

FRE position

LED status of 

REC position

Setting status

Setting changeover 

method

FRE

REC

OFF

ON

AUTO control (Initial setting)

Manual REC status is memorized. 
(Initial setting)

INTAKE SW: ON

ON

ON

Manual FRE status is memorized.

Manual REC status is memorized.

ON

OFF

Manual FRE status is memorized.

AUTO control

OFF

OFF

AUTO control

AUTO control

INSPECTION AND ADJUSTMENT

HAC-9

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

C

D

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HAC

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When battery cable is disconnected or battery voltage is below 10 V, memory function is canceled. Memory
function set becomes that of initial condition.

WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM

WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL 
SYSTEM : Description & Inspection

INFOID:0000000000959899

DESCRIPTION

The purpose of the operational check is to check if the individual system operates properly.

INSPECTION PROCEDURE

Memory Function

1.

Turn temperature control dial (driver side) clockwise until 32

°

C (90

°

F) is displayed.

2.

Press OFF switch.

3.

Turn ignition switch OFF.

4.

Turn ignition switch ON.

5.

Press AUTO switch.

6.

Confirm that the set temperature remains at previous temperature.

7.

Press OFF switch.

If NG, go to trouble diagnosis procedure for 

HAC-127, "Inspection procedure"

.

If OK, continue the check.

Blower

1.

Press fan (UP:+) switch. Blower should operate on low speed. The fan symbol should have one blade lit.

2.

Press fan (UP:+) switch again, and continue checking blower speed and fan symbol until all speeds are
checked.

3.

Leave blower on max. speed.

If NG, go to trouble diagnosis procedure for 

HAC-86, "WITH LEFT AND RIGHT VENTILATION TEMPERA-

TURE SEPARATELY CONTROL SYSTEM : Diagnosis Procedure"

.

If OK, continue the check.

Discharge Air

1.

Press MODE switch and DEF switch.

2.

Each position indicator should change shape.

3.

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

HAC-32, "WITH LEFT

AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : System Description"

.

If NG, go to trouble diagnosis procedure for 

HAC-69, "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 FRE
when the D/F or DEF is selected.

Intake Air

1.

Press intake switch. Recirculation indicator should illuminate.

2.

Press intake switch again. Fresh indicator should illuminate.

3.

Listen for intake door position change. (Slight change of blower sound can be heard.)

If NG, go to trouble diagnosis procedure for 

HAC-80, "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 FRE
when the D/F or DEF is selected.

Temperature Decrease

Conditions

: Engine running at normal operating temperature

HAC-10

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

INSPECTION AND ADJUSTMENT

1.

Turn temperature control dial (driver side) counterclockwise until 18

°

C (60

°

F) is displayed.

2.

Check for cold air at discharge air outlets.

If NG, go to trouble diagnosis procedure for 

HAC-119, "Inspection procedure"

.

If OK, continue the check.

Temperature Increase

1.

Turn temperature control dial (driver side) clockwise until 32

°

C (90

°

F) is displayed.

2.

Check for hot air at discharge air outlets.

If NG, go to trouble diagnosis procedure for 

HAC-122, "Inspection procedure"

.

If OK, continue the check.

A/C Switch

1.

Press AUTO switch and A/C switch.

2.

A/C switch indicator will turn ON.
• Confirm that the compressor clutch engages (sound or visual inspection).

Auto Mode

1.

Press AUTO switch and A/C switch.

2.

Display should indicate AUTO.
• Confirm that discharge air and blower speed will depend on ambient, in-vehicle, and set temperatures.

If NG, go to trouble diagnosis procedure for 

HAC-106, "Diagnosis Procedure"

, then if necessary, trouble diag-

nosis procedure for 

HAC-90, "Diagnosis Procedure"

.

If all operational checks are OK (symptom cannot be duplicated), go to Incident Simulation Tests in 

GI-35,

"Work Flow"

 and perform tests as outlined to simulate driving conditions environment. If symptom appears,

refer to 

HAC-117, "Diagnosis Chart By Symptom"

 and perform applicable trouble diagnosis procedures.

AUXILIARY MECHANISM

Temperature Setting Trimmer

The trimmer compensates for differences in range of 

±

3

°

C (

±

6

°

F) between temperature setting (displayed dig-

itally) and temperature felt by customer.

Operating procedures for this trimmer are as follows:

1.

Begin self-diagnosis STEP-5 mode. Refer to 

HAC-50, "WITH LEFT AND RIGHT VENTILATION TEM-

PERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

.

2.

Press fan (UP: +) switch to set system in auxiliary mode.

3.

Display shows “61” in auxiliary mechanism. It takes approximately 3 seconds to enable setting operation.

4.

Turn temperature control dial (driver side) as desired. Temperature will change at a rate of 0.5

°

C (1.0

°

F)

each time a dial is turned.

CAUTION:

• A decimal point is not indicated on the display.

INSPECTION AND ADJUSTMENT

HAC-11

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

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• Negative value is not displayed on the display.

When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Tempera-
ture set becomes that of initial condition, i.e. 0

°

C (0

°

F).

Foot Position Setting Trimmer

Wind distribution ratio in FOOT mode can be set.

Operating procedures for this trimmer are as follows:

1.

Begin self-diagnosis STEP-5 mode. Refer to 

HAC-50, "WITH LEFT AND RIGHT VENTILATION TEM-

PERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

.

2.

Press fan (UP:+) switch to set system in auxiliary mode.

3.

Press mode switch as desired.

JSIIA0013GB