Infiniti FX35, FX50 (S51). Manual - part 1152

INSPECTION AND ADJUSTMENT

HAC-5

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

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INSPECTION AND ADJUSTMENT

WITHOUT ACCS

WITHOUT ACCS : Description & Inspection

INFOID:0000000005246200

DESCRIPTION

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

INSPECTION PROCEDURE

1.

CHECK MEMORY FUNCTION

1.

Start the engine.

2.

Turn temperature control dial (driver side) clockwise until 32.0

°

C (90

°

F) is displayed.

3.

Press the OFF switch.

4.

Turn the ignition switch OFF.

5.

Turn the ignition switch ON.

6.

Press the AUTO switch.

7.

Check that the temperature setting before turning the ignition switch OFF is stored. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Memory function malfunction: 

HAC-162, "Inspection procedure"

.

2.

CHECK BLOWER MOTOR SPEED

1.

Start the engine.

2.

Press fan (UP: +) switch. Check that the fan speed changes. Check the operation for all fan speeds. 

3.

Set the fan speed to max speed.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Blower motor system malfunction: 

HAC-80, "Diagnosis Procedure"

.

3.

CHECK DISCHARGE AIR

1.

Press the MODE switch and the DEF switch.

2.

Each position indicator should change shape. 

3.

Confirm that discharge air comes out according to the air distribution table as follows:

NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and the intake door position is at
FRE when D/F or DEF is selected.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Mode door system malfunction: 

HAC-70, "Diagnosis Procedure"

.

Conditions

: Engine running at normal operating temperature

JSIIA1208GB

HAC-6

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

INSPECTION AND ADJUSTMENT

4.

CHECK 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.)

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Intake door system malfunction: 

HAC-76, "WITHOUT ACCS : Diagnosis Procedure"

.

5.

CHECK A/C SWITCH

1.

Press the A/C switch.

2.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Magnet clutch system malfunction: 

HAC-84, "Diagnosis Procedure"

.

6.

CHECK WITH TEMPERATURE SETTING LOWERED

1.

Turn temperature control dial (driver side) counterclockwise until 18.0

°

C (60

°

F) is displayed.

2.

Check that the cool air blows from the outlets. 

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Insufficient cooling: 

HAC-155, "Inspection procedure"

.

7.

CHECK WITH TEMPERATURE SETTING RAISED

1.

Turn temperature control dial (driver side) clockwise until 32.0

°

C (90

°

F) is displayed.

2.

Check that the warm air blows from the outlets.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Insufficient heating: 

HAC-157, "Inspection procedure"

.

8.

CHECK LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM FUNC-

TION

1.

Press the DUAL switch, and then check that “DUAL” is shown on the display. 

2.

Operate temperature control dial (driver side). Check that the discharge air temperature (driver side)
changes. 

3.

Operate the temperature control dial (passenger side). Check that the discharge air temperature (passen-
ger side) changes. 

4.

Press the DUAL switch, and then check that the temperature setting (LH/RH) is unified to the driver side
temperature setting. 

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Refer to 

HAC-154, "Diagnosis Chart By Symptom"

 and perform the appropriate diagnosis. 

9.

CHECK AUTO MODE

1.

Press the AUTO switch, and then check that “AUTO” is shown on the display. 

2.

Check that the discharge air and blower speed depend on ambient temperature, in-vehicle temperature
and temperature setting.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

HAC-154, "Diagnosis Chart By Symptom"

 and perform the appropriate diagnosis. 

WITHOUT ACCS : Temperature Setting Trimmer

INFOID:0000000005246201

DESCRIPTION

INSPECTION AND ADJUSTMENT

HAC-7

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

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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 per the following:

1.

Begin self-diagnosis STEP-5 mode. Refer to 

HAC-57, "WITHOUT ACCS : 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.

NOTE:
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).

WITHOUT ACCS : Foot Position Setting Trimmer

INFOID:0000000005246202

DESCRIPTION

Wind distribution ratio in FOOT mode can be set.

Operating procedures for this trimmer are as per the following:

JSIIA1210GB

HAC-8

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

INSPECTION AND ADJUSTMENT

1.

Begin self-diagnosis STEP-5 mode. Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis Description"

.

2.

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

3.

Press mode switch as desired.

NOTE:
When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Air distri-
bution ratio set becomes that of initial condition.

WITHOUT ACCS : Inlet Port Memory Function

INFOID:0000000005246203

DESCRIPTION

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 per the following:

1.

Begin self-diagnosis STEP-5 mode. Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis Description"

.

2.

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

3.

Press intake switch as desired.

NOTE:
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 ACCS

WITH ACCS : Description & Inspection

INFOID:0000000005246204

DESCRIPTION

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

INSPECTION PROCEDURE

1.

CHECK MEMORY FUNCTION

1.

Start the engine.

JSIIA1209GB

FRE indicator

REC indicator

Setting status

Setting changeover 

method

FRE

REC

OFF

ON

AUTO control (Initial setting)

Manual REC status is memorized. 
(Initial setting)

Intake switch: 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

Conditions

: Engine running at normal operating temperature