Nissan Murano Z51 (2008 year). Manual - part 228

FLUORESCENT LEAK DETECTOR

HAC-123

< PRECAUTION >

[WITHOUT 7 INCH DISPLAY]

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FLUORESCENT LEAK DETECTOR

General Precautions

INFOID:0000000003073116

CAUTION:

• The A/C system contains a fluorescent leak detection dye used for locating refrigerant leakages. An

ultraviolet (UV) lamp is required to illuminate the dye when inspecting for leakages.

• Always wear fluorescence enhancing UV safety goggles to protect eyes and enhance the visibility of

the fluorescent dye.

• The fluorescent dye leak detector is not a replacement for an electrical leak detector (SST: J-41995).

The fluorescent dye leak detector should be used in conjunction with an electrical leak detector
(SST: J-41995) to pin-point refrigerant leakages.

• Read and follow all manufacture operating instructions and precautions prior to performing the work

for the purpose of safety and customer satisfaction.

• A compressor shaft seal should not necessarily be repaired because of dye seepage. The compres-

sor shaft seal should only be repaired after confirming the leakage with an electrical leak detector
(SST: J-41995).

• Always remove any remaining dye from the leakage area after repairs are completed to avoid a mis-

diagnosis during future service.

• Never allow dye to come into contact with painted body panels or interior components. Clean imme-

diately with the approved dye cleaner if dye is spilled. Fluorescent dye left on a surface for an
extended period of time cannot be removed.

• Never spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).
• Never use more than one refrigerant dye bottle (1/4 ounce /7.4 cc) per A/C system.
• Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Never use

HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system, or CFC-12 (R-12) leak detection
dye in HFC-134a (R-134a) A/C system, or A/C system damage may result.

• The fluorescent properties of the dye remains for three or more years unless a compressor malfunc-

tion occurs.

IDENTIFICATION

NOTE:
Vehicles with factory installed fluorescent dye have a green label.
Vehicles without factory installed fluorescent dye have a blue label.

IDENTIFICATION LABEL FOR VEHICLE

Vehicles with factory installed fluorescent dye have an identification label on the front side of hood.

Revision: 2008 October

2009 Murano

HAC-124

< BASIC INSPECTION >

[WITH 7 INCH DISPLAY]

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000003469237

OVERALL SEQUENCE

*1: Refer to 

HAC-220, "DTC Index"

.

*2: Refer to 

HAC-222, "Diagnosis Chart By Symptom"

.

DETAILED FLOW

1.

OBTAIN INFORMATION ABOUT SYMPTOM

Interview the customer to obtain as much information as possible about the conditions and environment under
which the malfunction occurred.

>> GO TO 2.

2.

VERIFY SYMPTOM

Verify the symptom with operational check based on the information obtained from the customer. Refer to

HAC-126, "Description & Inspection"

.

>> GO TO 3.

JSIIA0943GB

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DIAGNOSIS AND REPAIR WORKFLOW

HAC-125

< BASIC INSPECTION >

[WITH 7 INCH DISPLAY]

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3.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC. Refer to 

HAC-220, "DTC Index"

.

Are self-diagnosis results normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

NARROW DOWN THE MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS

Perform symptom diagnosis and narrow down the malfunctioning parts. Refer to 

HAC-222, "Diagnosis Chart

By Symptom"

.

>> GO TO 5.

5.

REPAIR OR REPLACE

Repair or replace malfunctioning parts.
NOTE:
If DTC is displayed, erase DTC after repairing or replacing malfunctioning parts.

>> GO TO 6.

6.

FINAL CHECK

Check that the A/C system operates normally.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 3.

Revision: 2008 October

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HAC-126

< BASIC INSPECTION >

[WITH 7 INCH DISPLAY]

INSPECTION AND ADJUSTMENT

INSPECTION AND ADJUSTMENT

Description & Inspection

INFOID:0000000003609250

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.

Operate the temperature control dial (driver side) and raise the temperature setting to 32

°

C (90

°

F). 

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-231, "Inspection procedure"

.

2.

CHECK BLOWER MOTOR SPEED

1.

Start the engine.

2.

Operate the fan control dial. Check that the fan speed changes. Check the operation for all fan speeds. 

3.

Set the fan speed to speed 7.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Blower motor system malfunction: 

HAC-187, "Diagnosis Procedure"

.

3.

CHECK DISCHARGE AIR(MODE SWITCH AND DEF SWITCH)

1.

Press the MODE switch and the DEF switch.

2.

Check that the air outlets change according to each indicated air outlet by placing a hand in front of the
outlets. Refer to 

HAC-135, "System Description"

. 

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.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Mode door system malfunction: 

HAC-180, "Diagnosis Procedure"

.

4.

CHECK DISCHARGE AIR (UPPER VENT SWITCH)

1.

Press the UPPER VENT switch. 

2.

The UPPER VENT switch indicator is turned ON. 

Conditions

: Engine running at normal operating temperature

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INSPECTION AND ADJUSTMENT

HAC-127

< BASIC INSPECTION >

[WITH 7 INCH DISPLAY]

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3.

Check that the air blown from UPPER VENT does not greatly deviate from the air mix ratio. 

4.

Press the UPPER VENT switch again. 

5.

The UPPER VENT switch indicator is turned OFF. 

6.

The air blown from the UPPER VENT stops. 

Does it operate normally?

YES

>> GO TO 5.

NO

>> Upper ventilator door system malfunction: 

HAC-185, "Diagnosis Procedure"

.

5.

CHECK INTAKE AIR

1.

Press the intake switch. Indicator is turned ON (REC).

2.

Press the intake switch again. Indicator is turned OFF (FRE).

3.

Listen for the 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 intake door position is at FRE
when the D/F or DEF is selected.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Intake door system malfunction: 

HAC-183, "Diagnosis Procedure"

.

6.

CHECK A/C SWITCH

1.

Press the A/C switch.

2.

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

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Magnet clutch system malfunction: 

HAC-191, "Diagnosis Procedure"

.

7.

CHECK WITH TEMPERATURE SETTING LOWERED

1.

Operate the compressor. 

2.

Operate the temperature control switch (driver side) and lower the temperature setting to 18

°

C (60

°

F). 

3.

Check that the cool air blows from the outlets. 

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Insufficient cooling: 

HAC-223, "Inspection procedure"

.

8.

CHECK WITH TEMPERATURE SETTING RAISED

1.

Operate the temperature control dial (driver side) and raise the temperature setting to 32

°

C (90

°

F) after

warming up the engine. 

2.

Check that the warm air blows from the outlets.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Insufficient heating: 

HAC-226, "Inspection procedure"

.

JPIIA0509GB

Revision: 2008 October

2009 Murano

HAC-128

< BASIC INSPECTION >

[WITH 7 INCH DISPLAY]

INSPECTION AND ADJUSTMENT

9.

CHECK LH/RH INDEPENDENT TEMPERATURE ADJUSTMENT FUNCTION

1.

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

2.

Operate the 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 10.

NO

>> Refer to 

HAC-222, "Diagnosis Chart By Symptom"

 and perform the appropriate diagnosis. 

10.

CHECK AUTO MODE

1.

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

2.

Operate the temperature control dial (driver side). Check that the fan speed or outlet changes (the dis-
charge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting). 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

HAC-222, "Diagnosis Chart By Symptom"

 and perform the appropriate diagnosis. 

Temperature Setting Trimmer

INFOID:0000000003469243

Description

If the temperature felt by the customer is different than the air flow temperature controlled by the temperature
setting, the auto amplifier control temperature can be adjusted to compensate for the temperature setting. 

How to set

Using CONSULT-III, perform “TEMP SET CORRECT” on “WORK SUPPORT” of HVAC. 

NOTE:

• When the temperature setting is set to 25.0

°

C (77

°

F) and 

−

3.0

°

C (

−

6

°

F), the temperature controlled by auto amp is 25.0

°

C (77

°

F) 

−

3.0

°

C (6

°

F) = 22.0

°

C (71

°

F) and the temperature becomes lower than the temperature setting. 

• When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10V or less, the setting of the

difference between the temperature setting and control temperature may be cancelled. 

Foot Position Setting Trimmer

INFOID:0000000003469244

Description

In the FOOT mode, the air blowing to the DEF can be turned ON/OFF. 

Work support items

Display (

°

F)

Display (

°

C)

TEMP SET CORRECT

6

3.0

5

2.5

4

2.0

3

1.5

2

1.0

1

0.5

0 (initial status)

0 (initial status)

−

1

−

0.5

−

2

−

1.0

−

3

−

1.5

−

4

−

2.0

−

5

−

2.5

−

6

−

3.0

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INSPECTION AND ADJUSTMENT

HAC-129

< BASIC INSPECTION >

[WITH 7 INCH DISPLAY]

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How to set

Using CONSULT-III, perform “BLOW SET” on “WORK SUPPORT” of HVAC. 

NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10V
or less, the setting of the discharge air mix ratio in FOOT mode may be cancelled. 

Inlet Port Memory Function (FRE)

INFOID:0000000003469245

Description

• If the ignition switch is turned to the OFF position while the FRE switch is set to ON (fresh air intake), “Per-

form the memory” or “Do not perform the memory” of the FRE switch ON (fresh air intake) condition can be
selected. 

• If “Perform the memory” was set, the FRE switch will be ON (fresh air intake) when turning the ignition switch

to the ON position again. 

• If “Do not perform the memory” was set, the air inlets will be controlled automatically when turning the igni-

tion switch to the ON position again. 

How to set

Using CONSULT-III, perform “FRE MEMORY SET” on “WORK SUPPORT” of HVAC. 

NOTE:

When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10V or less, the setting of the
FRE switch memory function may be cancelled. 

Inlet Port Memory Function (REC)

INFOID:0000000003469246

Description

• If the ignition switch is turned to the OFF position while the REC switch is set to ON (recirculation), “Perform

the memory” or “Do not perform the memory” of the REC switch ON (recirculation) condition can be
selected. 

• If “Perform the memory” was set, the REC switch will be ON (recirculation) when turning the ignition switch

to the ON position again. 

• If “Do not perform the memory” was set, the air inlets will be controlled automatically when turning the igni-

tion switch to the ON position again. 

How to set

Using CONSULT-III, perform “REC MEMORY SET” on “WORK SUPPORT” of HVAC. 

NOTE:

When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10V or less, the setting of the
REC switch memory function may be cancelled. 

Work support items

Display

DEF door position

Auto control

Manual control

BLOW SET

Mode 1

OPEN

CLOSE

Mode 2 (initial status)

OPEN

OPEN

Mode 3

CLOSE

OPEN

Mode 4

CLOSE

CLOSE

Work support items

Display

Setting

FRE MEMORY SET

WITHOUT

Perform the memory of manual FRE

WITH (initial status)

Do not perform the memory of manual FRE (auto 
control)

Work support items

Display

Setting

REC MEMORY SET

WITHOUT (initial status)

Perform the memory of manual REC

WITH

Do not perform the memory of manual REC (auto 
control)

Revision: 2008 October

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HAC-130

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

COMPRESSOR CONTROL FUNCTION

FUNCTION DIAGNOSIS

COMPRESSOR CONTROL FUNCTION

Description

INFOID:0000000003469251

PRINCIPLE OF OPERATION

Compressor is not activated.

Functional circuit diagram

Functional initial inspection chart

×

: Applicable

CAN (1)

: A/C switch signal
: Blower fan motor switch signal

CAN (2)

: A/C compressor request signal

JPIIA0484GB

Control unit

Diagnosis item

Location

A

B

C

D

A/C auto amp.

 “HVAC”

Self-diagnosis

×

—

—

—

Data monitor

×

—

—

—

Active test

×

—

—

×

ECM

 “ENGINE”

Self-diagnosis function
(CAN system diagnosis)

—

—

×

—

Data monitor

—

×

×

—

IPDM E/R

 “IPDM E/R”

Self-diagnosis function
(CAN system diagnosis)

—

—

—

×

Data monitor

—

—

×

—

Auto active test

—

—

—

×

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COMPRESSOR CONTROL FUNCTION

HAC-131

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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Fail-Safe

INFOID:0000000003469252

FAIL-SAFE FUNCTION

• If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30

seconds or longer, air conditioner is controlled under the following conditions:

Component Part Location

INFOID:0000000003469253

ENGINE COMPARTMENT

Compressor

: ON

Air outlet

: AUTO

Air inlet

: FRE (Fresh)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

Revision: 2008 October

2009 Murano

HAC-132

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

COMPRESSOR CONTROL FUNCTION

PASSENGER COMPARTMENT

1.

Refrigerant pressure sensor

2.

Compressor (magnet clutch)

3.

Ambient sensor

JPIIA0607ZZ

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COMPRESSOR CONTROL FUNCTION

HAC-133

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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1.

Intake door motor

2.

Upper ventilator door motor

3.

Air mix door motor (passenger side)

4.

Air mix door motor (driver side)

5.

Mode door motor

6.

Sunload sensor

7.

In-vehicle sensor

8.

A/C auto amp.

9.

Intake sensor

10. Blower motor

JPIIA0608ZZ

Revision: 2008 October

2009 Murano

HAC-134

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

COMPRESSOR CONTROL FUNCTION

Component’s Role

INFOID:0000000003469254

Component

Reference

Refrigerant pressure sensor

EC-463, "Description"

Compressor

HAC-191, "Description"

Ambient sensor

HAC-163, "Description"

Intake door motor

HAC-182, "Description"

Upper ventilator door motor

HAC-184, "Description"

Air mix door motor (driver side)

HAC-175, "Description"

Air mix door motor (passenger side)

HAC-177, "Description"

Mode door motor

HAC-179, "Description"

Sunload sensor

HAC-172, "Description"

In-vehicle sensor

HAC-166, "Description"

A/C auto amp. 

HAC-193, "A/C AUTO AMP. : Description"

Intake sensor

HAC-169, "Description"

Blower motor

HAC-187, "Description"

Revision: 2008 October

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AUTOMATIC AIR CONDITIONER SYSTEM

HAC-135

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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AUTOMATIC AIR CONDITIONER SYSTEM

System Diagram

INFOID:0000000003469259

CONTROL SYSTEM

The control system consists of input sensors, switches, the A/C auto amp. (microcomputer) and outputs. The
relationship of these components is as shown in the figure below:

System Description

INFOID:0000000003469260

CONTROL OPERATION

Display

The operation status of the system is displayed on the screen.

JSIIA1542GB

JPIIA0511GB

Revision: 2008 October

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HAC-136

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

AUTOMATIC AIR CONDITIONER SYSTEM

Preset Switch

MODE Switch

The air discharge outlets are controlled with this switch.

Temperature Control Dial (Driver Side) 

The set temperature is increased or decreased with this dial.

Temperature Control Dial (Passenger Side) 

• The set temperature is increased or decreased with this dial.
• When the temperature control dial is turned, DUAL switch indicator is turned ON.

AUTO Switch 

• The compressor, intake doors, air mix doors, mode doors and blower speed are automatically controlled so

that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the operator.

• When pressing the AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automati-

cally controlled.

Defroster (DEF) Switch

Mode doors are set to the defrost position with this switch. Also, intake doors are set to the outside air position,
and compressor turns ON.

UPPER VENT Switch

• When the UPPER VENT switch is pressed, the UPPER VENT switch indicator is turned ON. 
• When the UPPER VENT switch indicator is turned ON, the UPPER VENT switch indicator is turned OFF by

pressing the defroster (DEF) switch (after the above operation, the UPPER VENT switch indicator is turned
ON by pressing the UPPER VENT switch). 

A/C Switch

Compressor turns ON or OFF with this switch.
(Pressing the A/C switch when the A/C switch is ON turns OFF the A/C switch and compressor.)

Fan Control Dial

The blower speed is manually controlled with this dial. Seven speeds are available for manual control (as
shown on the display screen).

OFF Switch

Compressor and blower turn OFF, intake doors and the mode doors are automatically controlled.

Rear Window Defogger Switch

When indicator is ON, rear window is defogged.

Intake Switch

• When the intake switch is ON, the intake switch indicator is turned ON, and air inlet is set to REC.
• When the intake switch is pressed again, the intake switch indicator is turned OFF, and air inlet is set to FRE.
• When the intake switch is pressed for approximately 1.5 seconds or longer, the intake switch indicator lamps

blink twice. Then, automatic control mode is entered. Inlet status is displayed by indicator even when auto-
matically controlled.

JPIIA0488GB

Revision: 2008 October

2009 Murano

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-137

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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• When the intake switch indicator is turned OFF, shifting mode position to D/F or DEF, or when compressor is

turned from ON to OFF, intake switch is automatically turned OFF (set to FRE mode). REC mode can be re-
entered by pressing intake switch again, and then compressor is turned ON. (Except D/F or DEF position)

DUAL Switch

• When the DUAL switch indicator is ON, the driver side and passenger side, temperature can each be set

independently.

• When the DUAL switch indicator is OFF, the driver side outlet and setting temperature are applied to both

sides.

Revision: 2008 October

2009 Murano

HAC-138

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

AUTOMATIC AIR CONDITIONER SYSTEM

DISCHARGE AIR FLOW

JPIIA0512GB

Revision: 2008 October

2009 Murano