Nissan Sentra. Manual - part 554

HAC-64

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

B257B, B257C AMBIENT SENSOR

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK AMBIENT SENSOR 

Check ambient sensor. Refer to 

HAC-64, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-105, "Removal and Installation"

.

NO

>> Replace ambient sensor. Refer to 

HAC-106, "Removal and Installation"

.

4.

CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp.connector.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR GROUND SHORT

Check continuity between ambient sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR POWER SHORT

1. Turn ignition switch ON.

2. Check voltage between ambient sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-105, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000009757659

1.

CHECK AMBIENT SENSOR

1. Turn ignition switch OFF.

2. Disconnect ambient sensor connector.

Ambient sensor

—

Continuity

Connector

Terminal

E67

2

Ground

Yes

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E67

1

M34

4

Yes

Ambient sensor

—

Continuity

Connector

Terminal

E67

1

Ground

No

+

−

Voltage

(Approx.)

Ambient sensor

Connector

Terminal

E67

1

Ground

0 V

B257B, B257C AMBIENT SENSOR

HAC-65

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

3. Check resistance between ambient sensor terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace ambient sensor. Refer to 

HAC-106, "Removal and Installation"

.

Terminal

Condition

Resistance: k

Ω

Temperature: 

°C (°F)

1

2

 

−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

HAC-66

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

B2581, B2582 INTAKE SENSOR

B2581, B2582 INTAKE SENSOR

DTC Logic

INFOID:0000000009757660

DTC DETECTION LOGIC 

NOTE:

• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

58, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to 

HAC-

59, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON.

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

3. Check if any DTC No. is displayed in the self-diagnosis results. 
Is DTC detected?

YES

>> Refer to 

HAC-66, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009757661

Regarding Wiring Diagram information, refer to 

HAC-41, "Wiring Diagram"

.

1.

CHECK INTAKE SENSOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect intake sensor connector.

3. Turn ignition switch ON.

4. Check voltage between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK INTAKE SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between intake sensor harness connector and ground.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2581

INTAKE SENSOR

The intake sensor recognition temperature is 
too high.

• Intake sensor
• A/C auto amp.
• Harness or connectors

(The sensor circuit is open or short-
ed.)

B2582

The intake sensor recognition temperature is 
too low.

+

−

Voltage

(Approx.)

Intake sensor

Connector

Terminal

M68

1

Ground

5 V

B2581, B2582 INTAKE SENSOR

HAC-67

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTAKE SENSOR

Check intake sensor. Refer to 

HAC-67, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-105, "Removal and Installation"

.

NO

>> Replace intake sensor. Refer to 

HAC-109, "Removal and Installation"

.

4.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR OPEN

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 5.

NO

>> Repair harness or connector.

5.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND

Check continuity between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO VOLTAGE

1. Turn ignition switch ON.

2. Check voltage between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-105, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000009757662

1.

CHECK INTAKE SENSOR

1. Turn ignition switch OFF.

2. Disconnect intake sensor connector.

Intake sensor

—

Continuity

Connector

Terminal

M68

2

Ground

Yes

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M68

1

M34

3

Yes

Intake sensor

—

Continuity

Connector

Terminal

M68

1

Ground

No

+

−

Voltage

(Approx.)

Intake sensor

Connector

Terminal

M68

1

Ground

0 V