Infiniti EX35. Manual - part 902

HAC-4

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

143

Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect  .................................

143

Precaution for Procedure without Cowl Top Cover ..

144

Precautions For Xenon Headlamp Service  ...........

144

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

144

General Refrigerant Precaution  .............................

145

Refrigerant Connection  .........................................

145

Service Equipment ................................................

149

COMPRESSOR  ................................................

152

General Precautions  .............................................

152

LEAK DETECTION DYE  ..................................

153

General Precautions  .............................................

153

DIAGNOSIS AND REPAIR WORKFLOW

HAC-5

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000003545559

DETAILED 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.

VERIFY THE SYMPTOM WITH OPERATIONAL CHECK

Verify the symptom with operational check. Refer to 

HAC-6, "WITHOUT LEFT AND RIGHT VENTILATION

TEMPERATURE SEPARATELY CONTROL SYSTEM : Description & Inspection"

 (Without left and right venti-

lation temperature separately control system) or 

HAC-11, "WITH LEFT AND RIGHT VENTILATION TEMPER-

ATURE SEPARATELY CONTROL SYSTEM : Description & Inspection"

 (With left and right ventilation

temperature separately control system).

>> GO TO 3.

3.

GO TO APPROPRIATE TROUBLE DIAGNOSIS

Go to appropriate trouble diagnosis (Refer to 

HAC-132, "Diagnosis Chart By Symptom"

 below).

>> GO TO 4.

4.

REPAIR OR REPLACE

Repair or replace the specific parts.

>> GO TO 5.

5.

FINAL CHECK

Final check.

Is the inspection result normal?

YES

>> CHECK OUT

NO

>> GO TO 3.

HAC-6

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

INSPECTION AND ADJUSTMENT

INSPECTION AND ADJUSTMENT

WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY
CONTROL SYSTEM

WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM : Description & Inspection

INFOID:0000000003545560

DESCRIPTION

The purpose of the operational check is to check that the individual system operates normally.

INSPECTION PROCEDURE

Memory Function

1.

Turn temperature control dial 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-142, "Inspection procedure"

.

If OK, continue the check.

Blower

1.

Turn fan control dial clockwise. Blower should operate on low speed. The fan symbol should have one
blade lit.

2.

Turn fan control dial clockwise 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-81, "WITHOUT LEFT AND RIGHT VENTILATION TEMPER-

ATURE SEPARATELY CONTROL SYSTEM : Diagnosis Procedure"

.

If OK, continue the check.

Discharge Air

1.

Press MODE switches and DEF switch.

2.

Each position indicator turns ON.

3.

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

HAC-26, "WITHOUT

LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : System
Description"

.

Conditions

: Engine running at normal operating temperature

INSPECTION AND ADJUSTMENT

HAC-7

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Without rear ventilation

With rear ventilation

If NG, go to trouble diagnosis procedure for 

HAC-70, "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. REC indicator turns ON.

2.

Press intake switch again. FRE indicator turns ON.

3.

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

If NG, go to trouble diagnosis procedure for 

HAC-78, "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.

A/C Switch

1.

Press A/C switch.

2.

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

If NG, go to trouble diagnosis procedure for 

HAC-88, "Diagnosis Procedure"

.

If OK, continue the check.

Temperature Decrease

1.

Turn temperature control dial counterclockwise until 18

°

C (60

°

F) is displayed.

2.

Check for cool air at discharge air outlets.

JSIIA0242GB

JSIIA0893GB