Nissan Maxima. Manual - part 741

HAC-140

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

B2578, B2579 IN-VEHICLE SENSOR

YES

>> Replace A/C auto amp. Refer to 

HAC-203, "Removal and Installation"

.

NO

>> Replace in-vehicle sensor. Refer to 

HAC-205, "Removal and Installation"

.

4.

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

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp. connector.

3. Check continuity between in-vehicle sensor harness connector

M34 (A) terminal 1 and A/C auto amp. harness connector M37

(B) terminal 36.

4. Check continuity between in-vehicle sensor harness connector

M34 (A) terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-203, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000010051140

1.

CHECK IN-VEHICLE SENSOR

1. Turn ignition switch OFF.

2. Disconnect in-vehicle sensor connector.

3. Check resistance between in-vehicle sensor terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace in-vehicle sensor. Refer to 

HAC-205, "Removal and Installation"

.

1 - 36

: Continuity should exist.

1 - Ground

: Continuity should not exist.

AWIIA1138ZZ

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

B2581, B2582 INTAKE SENSOR

HAC-141

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B2581, B2582 INTAKE SENSOR

Description

INFOID:0000000010051141

Intake Sensor

• The intake sensor is located on the evaporator.

• 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:0000000010051142

DTC DETECTION LOGIC

NOTE:

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

HAC-

133, "DTC Logic"

 or 

HAC-134, "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-

133, "DTC Logic"

 or 

HAC-134, "DTC Logic"

. 

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

YES

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

HAC-141, "Diagnosis Procedure"

. 

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010051143

WJIA0100E

JPIIA0614GB

DTC

Items

 (CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

B2581

EVAP TEMP SEN (SHORT)

Detected temperature at intake sensor 
55

°C (131°F) or more

• 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 
-30

°C (-22°F) or less

HAC-142

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

B2581, B2582 INTAKE SENSOR

Regarding Wiring Diagram information, refer to 

HAC-173, "Wiring Diagram - With Monochrome Display"

.

1.

CHECK INTAKE SENSOR POWER SUPPLY

1. Disconnect intake sensor connector.

2. Turn ignition switch ON.

3. Check voltage between intake sensor harness connector M69

terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK 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 M69

(A) terminal 2 and A/C auto amp. harness connector M37 (B)

terminal 37.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTAKE SENSOR

Check intake sensor. Refer to 

HAC-142, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-203, "Removal and Installation"

.

NO

>> Replace intake sensor. Refer to 

HAC-207, "Removal and Installation"

.

4.

CHECK 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 M69

(A) terminal 1 and A/C auto amp. harness connector M37 (B)

terminal 16.

4. Check continuity between intake sensor harness connector M69

(A) terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-203, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000010051144

1.

CHECK INTAKE SENSOR

1. Turn ignition switch OFF.

2. Disconnect intake sensor connector.

3. Check resistance between intake sensor terminals.

1 - Ground

: Approx. 5V

AWIIA1174ZZ

2 - 37

: Continuity should exist.

AWIIA1175ZZ

1 - 16

: Continuity should exist.

1 - Ground

: Continuity should not exist.

AWIIA1176ZZ

B2581, B2582 INTAKE SENSOR

HAC-143

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace intake sensor. Refer to 

HAC-207, "Removal and Installation"

.

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