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Nissan Murano Z51 (2008 year). Manual - part 230

MAGNET CLUTCH CONTROL SYSTEM

HAC-155

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

MAGNET CLUTCH CONTROL SYSTEM

System Diagram

INFOID:0000000003469283

System Description

INFOID:0000000003469284

The A/C auto amp. controls compressor operation by ambient temperature, intake air temperature and signal
from ECM.

SYSTEM OPERATION

When the A/C switch, the AUTO switch, or the DEF switch is pressed, or when shifting mode position D/F, A/C
auto amp. transmit the A/C switch signal and blower fan motor switch signal to the ECM, via CAN communica-
tion.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If the ECM judges that the compressor can be turned ON, it sends A/C com-
pressor request signal to the IPDM E/R, via CAN communication.
Upon receipt of A/C compressor request signal from the ECM, the IPDM E/R turns the A/C relay ON to oper-
ate the compressor.
When sending A/C compressor request signal to the IPDM E/R via CAN communication line, the ECM simul-
taneously sends A/C compressor feedback signal to A/C auto amp. via CAN communication line.
The ECM sends A/C compressor feedback signal to A/C auto amp., then, uses input A/C compressor feed-
back signal to control air inlet.

Compressor Protection Control

The ECM makes the A/C relay turn OFF and stops the compressor when pressure on the high-pressure side
detected by the refrigerant pressure sensor is over approximately 3,119 kPa (31.8 kg/cm

, 452 psi), or below

approximately 118 kPa (1.2 kg/cm

, 17 psi).

Low Temperature Protection Control

Turn the A/C relay to OFF and stop the compressor by the signal from the A/C auto amp according to the
evaporator passing air temperature detected by the intake sensor and the ambient temperature detected by
the ambient sensor.

JSIIA1548GB

Revision: 2008 October

2009 Murano

HAC-156

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

CAN COMMUNICATION SYSTEM

CAN COMMUNICATION SYSTEM

System Description

INFOID:0000000003469264

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto each vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only. For details, refer to

LAN-25, "CAN System Specification Chart"

Revision: 2008 October

2009 Murano

DIAGNOSIS SYSTEM (HVAC)

HAC-157

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

DIAGNOSIS SYSTEM (HVAC)

CONSULT-III Function

INFOID:0000000003469268

CONSULT-III can display each diagnosis item using the diagnosis test modes shown as per the following.

CONSULT-III application items

SELF DIAGNOSTIC RESULT

Refer to

HAC-220, "DTC Index"

Display Item List

Diagnosis mode

Description

ECU Identification

Displays the A/C auto amp. number.

Self Diagnostic Result

Displays the diagnosis results judged by A/C auto amp.

Data Monitor

Displays A/C auto amp. input/output data in real time.

Active Test

The signals used to activate each device are forcibly supplied from A/C auto amp.

Work Support

Changes the setting for each system function.
• Temperature setting trimmer
• Inlet port memory function (FRE)
• Inlet port memory function (REC)
• Foot position setting trimmer

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

U1000

CAN COMM CIRCUIT

When A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.

CAN communication system

U1010

CONTROL UNIT (CAN)

When detecting error during the initial
diagnosis of CAN controller of A/C auto
amp.

A/C auto amp.

B257B

AMB TEMP SEN SHORT

Detected temperature at ambient sen-
sor

−

C (

−

F) or less

• Ambient sensor
• A/C auto amp.
• Harness and connector

(Ambient sensor circuit is open,
or there is a short in the circuit)

B257C

AMB TEMP SEN OPEN

Detected temperature at ambient sen-
sor 100

C (212

F) or more

B2578

IN CAR SEN SHORT

Detected temperature at in-vehicle sen-
sor

−

C (

−

F) or less

• In-vehicle sensor
• A/C auto amp.
• Harness and connector

(In-vehicle sensor circuit is open,
or there is a short in the circuit)

B2579

IN CAR SEN OPEN

Detected temperature at in-vehicle sen-
sor 100

C (212

F) or more

B2581

EVAP TEMP SEN SHORT

Detected temperature at intake sensor

−

C (

−

F) or less

• Intake sensor
• A/C auto amp.
• Harness and connector

(Intake sensor circuit is open, or
there is a short in the circuit)

B2582

EVAP TEMP SEN OPEN

Detected temperature at intake sensor
69

C (156

F) or more

B2630

SUNLOAD SEN SHORT

Detected calorie at sunload sensor 64.7

w/m

(56 kcal/m

·h) or less

• Sunload sensor
• A/C auto amp.
• Harness and connector

(Sunload sensor circuit is open,
or there is a short in the circuit)

B2631

SUNLOAD SEN OPEN

Detected calorie at sunload sensor

2832 w/m

(2436 kcal/m

·h) or more

B2632

DR AIRMIX ACTR SHORT

Air mix door PBR (driver side) position
5% or less

• Air mix door motor (driver side)
• A/C auto amp.
• Harness and connector

(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted)

B2633

DR AIRMIX ACTR OPEN

Air mix door PBR (driver side) position
95% or more

Revision: 2008 October

2009 Murano

HAC-158

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

DIAGNOSIS SYSTEM (HVAC)

*: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise self-diag-
nosis indicates even though the sunload sensor is functioning normally.

DATA MONITOR

Display item list

B2634

PASS AIRMIX ACTR SHORT

Air mix door PBR (passenger side) po-
sition 5% or less

• Air mix door motor (passenger

side)

• A/C auto amp.
• Harness and connector

(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted)

B2635

PASS AIRMIX ACTR OPEN

Air mix door PBR (passenger side) po-
sition 95% or more

B2636

DR VENT DOOR FAIL

When the malfunctioning door position
is detected at VENT position

• Mode door motor
• A/C auto amp.
• Harness and connector

(CAN communication line is open
or shorted)
(Mode door motor is open or
shorted)

B2637

DR B/L DOOR FAIL

When the malfunctioning door position
is detected at B/L position

B2638

DR D/F1 DOOR FAIL

When the malfunctioning door position
is detected at FOOT position

B2639

DR DEF DOOR FAIL

When the malfunctioning door position
is detected at DEF position

B263D

FRE DOOR FAIL

When the malfunctioning intake door
position is detected at FRE position

• Intake door motor
• A/C auto amp.
• Harness and connector

(CAN communication line is open
or shorted)
(Intake door motor is open or
shorted)

B263E

20P FRE DOOR FAIL

When the malfunctioning intake door
position is detected at 20%FRE posi-
tion

B263F

REC DOOR FAIL

When the malfunctioning intake door
position is detected at REC position

B2654

D/F2 DOOR FAIL

When the malfunctioning door position
is detected at D/F position

• Mode door motor
• A/C auto amp.
• Harness and connector

(CAN communication line is open
or shorted)
(Mode door motor is open or
shorted)

B2655

B/L2 DOOR FAIL

When the malfunctioning door position
is detected at B/L2 position

B2661

UPPER VENT DOOR OPEN POSI
FAIL

When the malfunctioning upper ventila-
tor door position is detected at open po-
sition.

• Upper ventilator door motor
• A/C auto amp.
• Harness and connector

(CAN communication line is open
or shorted)
(Upper ventilator door motor is
open or shorted)

B2662

UPPER VENT DOOR MID POSI FAIL

When the malfunctioning upper ventila-
tor door position is detected at middle
position.

B2663

UPPER VENT DOOR SHUT POSI
FAIL

When the malfunctioning upper ventila-
tor door position is detected at shut po-
sition.

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

Monitor item [Unit]

Description

COMP REQ SIG

[On/Off]

Displays A/C switch ON/OFF status transmitted to other units via CAN communication

FAN REQ SIG

[On/Off]

Displays blower switch ON/OFF status transmitted to other units via CAN communica-
tion

AMB TEMP SEN

[

Ambient sensor value converted from ambient sensor signal received from ambient
sensor

IN-VEH TEMP

[

In-vehicle sensor value converted from in-vehicle sensor signal received from in-vehi-
cle sensor

INT TEMP SEN

[

Intake sensor value converted from intake sensor signal received from intake sensor

SUNLOAD SEN

[w/m

]

Sunload sensor value converted from sunload sensor signal received from sunload
sensor

Revision: 2008 October

2009 Murano

DIAGNOSIS SYSTEM (HVAC)

HAC-159

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

ACTIVE TEST

HVAC TEST

NOTE:

Perform the inspection of each output device after starting the engine because the compressor is operated.

WORK SUPPORT

AMB SEN CAL

[

Ambient sensor value calculated by A/C auto amp.

IN-VEH CAL

[

In-vehicle sensor value calculated by A/C auto amp.

INT TEMP CAL

[

Intake sensor value calculated by A/C auto amp.

SUNL SEN CAL

[w/m

]

Sunload sensor value calculated by A/C auto amp.

FAN DUTY

Duty ratio of blower motor judged by A/C auto amp.

Target discharge air temperature judged by A/C auto amp. according to the tempera-
ture setting and the value from each sensor

ENG COOL TEMP

[

Water temperature signal value received from ECM via CAN communication

VEHICLE SPEED

[Mph

(km/h)]

Vehicle speed signal value received from meter via CAN communication

Monitor item [Unit]

Description

Test item

Description

ALL SEG

NOTE:
• Item can be displayed but cannot be tested.
• When choosing to turn “ALL SEG” on, error message is displayed but it is not malfunction.

HVAC TEST

The operation check of A/C system can be performed by selecting the mode. Refer to the
following table for the conditions of each mode.

Test item

MODE 1

MODE 2

MODE 3

MODE 4

MODE 5

MODE 6

MODE 7

Mode door position

VENT1

VENT2

B/L1

B/L2

FOOT

D/F

DEF

Intake door position

REC

20%FRE

FRE

Air mix door position
(driver & passenger
side)

FULL COLD

FULL HOT

FULL COLD

FULL HOT

Blower motor duty ratio

35%

61%

81%

35%

Compressor (Magnet
clutch)

OFF

Upper ventilator door

OPEN

SHUT

OPEN

SHUT

Work item

Description

Reference

TEMP SET CORRECT
(Setting of difference between tem-
perature setting and control tempera-
ture)

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

HAC-128, "Temperature
Setting Trimmer"

BLOW SET
(Blow setting to DEF in FOOT mode)

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

HAC-128, "Foot Position
Setting Trimmer"

Revision: 2008 October

2009 Murano

HAC-160

< FUNCTION DIAGNOSIS >

[WITH 7 INCH DISPLAY]

DIAGNOSIS SYSTEM (HVAC)

NOTE:

When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of
WORK SUPPORT may be cancelled.

FRE MEMORY SET
(FRE memory function setting)

• If the ignition switch is turned to the OFF position while the FRE

switch is set to ON (fresh air intake), “Perform the memory” or
“Do not perform the memory” of the FRE switch ON (fresh air in-
take) 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 posi-
tion again.

• If “Do not perform the memory” was set, the air inlets will be con-

trolled automatically when turning the ignition switch to the ON
position again.

HAC-129, "Inlet Port
Memory Function (FRE)"

REC MEMORY SET
(REC memory function setting)

• 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 (re-

circulation) when turning the ignition switch to the ON position
again.

• If “Do not perform the memory” was set, the air inlets will be con-

trolled automatically when turning the ignition switch to the ON
position again.

HAC-129, "Inlet Port
Memory Function (REC)"

Work item

Description

Reference

Revision: 2008 October

2009 Murano

U1000 CAN COMM CIRCUIT

HAC-161

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000003469285

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with two
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to

LAN-15, "How to Use CAN Communication Signal Chart"

DTC Logic

INFOID:0000000003469286

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003469287

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

Turn ignition switch ON and wait for 2 or more seconds.

Using CONSULT-III, perform “SFLF-DIAGNOSIS RESULTS” of HVAC.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Perform trouble diagnosis for the CAN communication system. Refer to

LAN-16, "Trouble Diagno-

sis Flow Chart"

>> Perform the intermittent malfunction diagnosis. Refer to

GI-40, "Intermittent Incident"

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

U1000

CAN COMM CIRCUIT

When A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.

CAN communication system

Revision: 2008 October

2009 Murano

HAC-162

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000003469288

Initial diagnosis of A/C auto amp.

DTC Logic

INFOID:0000000003469289

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003469290

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

Is DTC No.“U1010” displayed?

YES

>> Replace A/C auto amp.

>> INSPECTION END

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

U1010

CONTROL UNIT (CAN)

When detecting error during the initial diag-
nosis of CAN controller of A/C auto amp.

A/C auto amp.

Revision: 2008 October

2009 Murano

B257B, B257C AMBIENT SENSOR

HAC-163

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

B257B, B257C AMBIENT SENSOR

Description

INFOID:0000000003469291

COMPONENT DESCRIPTION

Ambient Sensor

• The ambient sensor (1) is installed to the front bumper (left back).
• It detects ambient temperature and converts it into a resistance

value which is then input into the A/C auto amp.

Ambient Sensor Circuit

AMBIENT TEMPERATURE INPUT PROCESS

The A/C auto amp. equips a processing circuit for the ambient sensor input. However, when the temperature
detected by the ambient sensor increases quickly, the processing circuit retards the A/C auto amp. function. It
only allows the A/C auto amp. to recognize an ambient temperature increase of 0.33

C (0.6

F) per 100 sec-

onds.
As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the ambient sensor increases. This is because the
heat from the engine compartment can radiate to the front bumper area, the location of the ambient sensor.

DTC Logic

INFOID:0000000003469292

DTC DETECTION LOGIC

NOTE:
• If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to

HAC-

161, "DTC Logic"

HAC-162, "DTC Logic"

• If there is an open circuit in the ambient sensor, A/C auto amp. registers extreme cold [

−

C (

−

F)] and

adjusts the temperature control warmer.

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

JSIIA1532JP

JPIIA0612GB

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B257B

AMB TEMP SEN SHORT

Detected temperature at ambient sensor

−

C (

−

F) or less

• Ambient sensor
• A/C auto amp.
• Harness and connector

(Ambient sensor circuit is open,
or there is a short in the circuit)

B257C

AMB TEMP SEN OPEN

Detected temperature at ambient sensor
100

C (212

F) or more

Revision: 2008 October

2009 Murano

HAC-164

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

B257B, B257C AMBIENT SENSOR

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

Check if any DTC No. is displayed in the self-diagnosis results.

NOTE:
• If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to

HAC-

161, "DTC Logic"

HAC-162, "DTC Logic"

• If there is an open circuit in the ambient sensor, A/C auto amp. registers extreme cold [

−

C (

−

F)] and

adjusts the temperature control warmer.

Is DTC No.“B257B” or “B257C” displayed?

YES

>> Perform trouble diagnosis for the ambient sensor. Refer to

HAC-164, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003469294

CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND

Disconnect ambient sensor connector.

Turn ignition switch ON.

Check voltage between ambient sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK AMBIENT SENSOR

Check ambient sensor. Refer to

HAC-165, "Component Inspection"

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Replace ambient sensor.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.

Check continuity between ambient sensor harness connector and ground.

(+)

(

−

)

Voltage

Ambient sensor

—

Connector

Terminal

E337

Ground

Approx. 5 V

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E337

M50

Existed

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E337

M50

Existed

Revision: 2008 October

2009 Murano

B257B, B257C AMBIENT SENSOR

HAC-165

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Repair harness or connector.

Component Inspection

INFOID:0000000003469295

CHECK AMBIENT SENSOR

Turn ignition switch OFF.

Disconnect ambient sensor connector. Refer to

VTL-86, "Exploded View"

Check resistance between ambient sensor terminals.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace ambient sensor.

Ambient sensor

—

Continuity

Connector

Terminal

E337

Ground

Not existed

Terminal

Condition

Resistance k

Ω

Temperature

C (

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32)

6.19

5 (41)

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

Revision: 2008 October

2009 Murano

HAC-166

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

B2578, B2579 IN-VEHICLE SENSOR

B2578, B2579 IN-VEHICLE SENSOR

Description

INFOID:0000000003469296

In-vehicle Sensor
• The in-vehicle sensor (1) is located on instrument driver lower

panel (2).

• It converts variations in compartment air temperature drawn from

the aspirator into a resistance value. It is then input into the A/C
auto amp.

In-vehicle Sensor Circuit

Aspirator
The aspirator (1) is located on driver side of heater & cooling unit
assembly. It produces vacuum pressure due to air discharged from
the heater & cooling unit assembly, continuously taking compartment
air in the aspirator.

DTC Logic

INFOID:0000000003469297

DTC DETECTION LOGIC

JPIIA0557ZZ

JPIIA0613GB

JPIIA0517ZZ

RJIA1804E

Revision: 2008 October

2009 Murano

B2578, B2579 IN-VEHICLE SENSOR

HAC-167

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to

HAC-

161, "DTC Logic"

HAC-162, "DTC Logic"

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

Check if any DTC No. is displayed in the self-diagnosis results.

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to

HAC-

161, "DTC Logic"

HAC-162, "DTC Logic"

Is DTC No.“B2578” or “B2579” displayed?

YES

>> Perform trouble diagnosis for the in-vehicle sensor. Refer to

HAC-167, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003469299

CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND

Disconnect in-vehicle sensor connector.

Turn ignition switch ON.

Check voltage between in-vehicle sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between in-vehicle sensor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK IN-VEHICLE SENSOR

Check in-vehicle sensor. Refer to

HAC-168, "Component Inspection"

Is the inspection result normal?

YES

>> Replace A/C auto amp.

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2578

IN CAR SEN SHORT

Detected temperature at in-vehicle
sensor

−

C (

−

F) or less

• In-vehicle sensor
• A/C auto amp.
• Harness and connector

(In-vehicle sensor circuit is open,
or there is a short in the circuit)

B2579

IN CAR SEN OPEN

Detected temperature at in-vehicle
sensor 100

C (212

F) or more

(+)

(

−

)

Voltage

In-vehicle sensor

—

Connector

Terminal

M41

Ground

Approx. 5 V

In-vehicle sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M41

M50

Existed

Revision: 2008 October

2009 Murano

HAC-168

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

B2578, B2579 IN-VEHICLE SENSOR

>> Replace in-vehicle sensor.

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between in-vehicle sensor harness connector and A/C auto amp. harness connector.

Check continuity between in-vehicle sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Repair harness or connector.

Component Inspection

INFOID:0000000003469300

CHECK IN-VEHICLE SENSOR

Turn ignition switch OFF.

Disconnect in-vehicle sensor connector. Refer to

VTL-87, "Exploded View"

Check resistance between in-vehicle sensor terminals.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace in-vehicle sensor.

In-vehicle sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M41

M50

Existed

In-vehicle sensor

—

Continuity

Connector

Terminal

M41

Ground

Not existed

Terminal

Condition

Resistance k

Ω

Temperature

C (

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32)

6.19

5 (41)

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

Revision: 2008 October

2009 Murano

B2581, B2582 INTAKE SENSOR

HAC-169

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

HAC

B2581, B2582 INTAKE SENSOR

Description

INFOID:0000000003469301

Intake Sensor
• The intake sensor (1) is located on the evaporator (2).
• It converts air temperature after it passes through the evaporator

into a resistance value which is then input to the A/C auto amp.

Intake Sensor Circuit

DTC Logic

INFOID:0000000003469303

DTC DETECTION LOGIC

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to

HAC-

161, "DTC Logic"

HAC-162, "DTC Logic"

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

Check if any DTC No. is displayed in the self-diagnosis results.

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to

HAC-

161, "DTC Logic"

HAC-162, "DTC Logic"

Is DTC No.“B2581” or “B2582” displayed?

YES

>> Perform trouble diagnosis for the intake sensor. Refer to

HAC-169, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003469304

CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

JPIIA1351ZZ

JPIIA0614GB

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2581

EVAP TEMP SEN SHORT

Detected temperature at intake sensor

−

C (

−

F) or less

• Intake sensor
• A/C auto amp.
• Harness and connector

(Intake sensor circuit is open, or there is a
short in the circuit)

B2582

EVAP TEMP SEN OPEN

Detected temperature at intake sensor
69

C (156

F) or more

Revision: 2008 October

2009 Murano

HAC-170

< COMPONENT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

B2581, B2582 INTAKE SENSOR

Disconnect intake sensor connector.

Turn ignition switch ON.

Check voltage between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between intake sensor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK INTAKE SENSOR

Check intake sensor. Refer to

HAC-170, "Component Inspection"

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Replace intake sensor.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between intake sensor harness connector and A/C auto amp. harness connector.

Check continuity between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Repair harness or connector.

Component Inspection

INFOID:0000000003469305

CHECK INTAKE SENSOR

Turn ignition switch OFF.

Disconnect intake sensor connector.

Check resistance between intake sensor terminals.

(+)

(

−

)

Voltage

Intake sensor

—

Connector

Terminal

M42

Ground

Approx. 5 V

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

M50

Existed

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

M50

Existed

Intake sensor

—

Continuity

Connector

Terminal

M42

Ground

Not existed

Revision: 2008 October

2009 Murano

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