Nissan Murano. Manual - part 851

HAC-178

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

B2581, B2582 INTAKE SENSOR

B2581, B2582 INTAKE SENSOR

Description

INFOID:0000000009722170

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:0000000009722171

DTC DETECTION LOGIC

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

HAC-

170, "DTC Logic"

 or 

HAC-171, "DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT

1.

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

2.

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-

170, "DTC Logic"

 or 

HAC-171, "DTC Logic"

. 

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

YES

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

HAC-178, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009722172

1.

CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

JPIIA1351ZZ

JPIIA0614GB

DTC

Items

 (CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

B2581

INTAKE SENSOR

Detected temperature at intake sensor 

−

33

°

C (

−

27

°

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

Detected temperature at intake sensor 
69

°

C (156

°

F) or more

B2581, B2582 INTAKE SENSOR

HAC-179

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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1.

Disconnect intake sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

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

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTAKE SENSOR

Check intake sensor. Refer to 

HAC-179, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

NO

>> Replace intake sensor.

4.

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

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

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

4.

Check continuity between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000009722173

1.

CHECK INTAKE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect intake sensor connector.

3.

Check resistance between intake sensor terminals.

(+)

(

−

)

Voltage

Intake sensor

—

Connector

Terminal

M42

1

Ground

Approx. 5 V

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

2

M50

37

Existed

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

1

M50

16

Existed

Intake sensor

—

Continuity

Connector

Terminal

M42

1

Ground

Not existed

HAC-180

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

B2581, B2582 INTAKE SENSOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace intake sensor.

Terminal

Condition

Resistance k

Ω

Temperature 

°

C (

°

F)

1

2

−

15 (5)

18.63

−

10 (14)

14.15

−

5 (23)

10.86

0 (32)

8.41

5 (41)

6.58

10 (50)

5.19

15 (59)

4.12

20 (68)

3.30

25 (77)

2.67

30 (86)

2.17

35 (95)

1.78

40 (104)

1.46

45 (113)

1.21

B2630, B2631 SUNLOAD SENSOR

HAC-181

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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B2630, B2631 SUNLOAD SENSOR

Description

INFOID:0000000009722174

COMPONENT DESCRIPTION

Sunload Sensor

• The sunload sensor (1) is located on the driver’s side instrument

panel & pad. 

• It detects sunload entering through windshield by means of a

photo diode. The sensor converts the sunload into a current value
which is then input into the A/C auto amp.

Sunload Sensor Circuit

SUNLOAD INPUT PROCESS

The A/C auto amp. also equips a processing circuit which averages the variations in detected sunload over a
period of time. This prevents drastic swings in the air temperature control system operation due to small or
quick variations in detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor varies whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the air temperature control system operation. On the
other hand, shortly after entering a long tunnel, the system recognizes the change in sunload, and the system
reacts accordingly.

DTC Logic

INFOID:0000000009722175

DTC DETECTION LOGIC

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

HAC-

170, "DTC Logic"

 or 

HAC-171, "DTC Logic"

. 

• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.

When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).

JPIIA0559ZZ

JPIIA0615GB

DTC

Items

 (CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

B2630

SUNLOAD SENSOR

Detected calorie at sunload sensor 64.7 w/m

2

 

(56 kcal/m

2

·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

Detected calorie at sunload sensor 2832 w/m

2

 

(2436 kcal/m

2

·h) or more