Nissan Teana J32. Manual - part 669

B257B, B257C AMBIENT SENSOR

HAC-45

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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HAC

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1.

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

2.

Check if any DTC 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-

42, "DTC Logic"

 or 

HAC-43, "DTC Logic"

. 

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

−

44

°

C (

−

47

°

F)] and

adjusts the temperature control warmer. 

Is DTC “B257B” or “B257C” displayed?

YES

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

HAC-45, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003846330

1.

CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND

1.

Disconnect ambient sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between ambient sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

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

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 3.

NO

>> Repair harness or connector.

3.

CHECK AMBIENT SENSOR

Check ambient sensor. Refer to 

HAC-46, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

NO

>> Replace ambient sensor.

4.

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

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.

4.

Check continuity between ambient sensor harness connector and ground.

(+)

(

−

)

Voltage

Ambient sensor

—

Connector

Terminal

E337

1

Ground

Approx. 5 V

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E337

2

M50

37

Existed

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E337

1

M50

35

Existed

HAC-46

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B257B, B257C AMBIENT SENSOR

Is the inspection result normal?

YES

>> Replace A/C auto amp.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000003846331

1.

CHECK AMBIENT SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect ambient sensor connector. Refer to 

VTL-24, "Exploded View"

.

3.

Check resistance between ambient sensor terminals.

Is the inspection result normal?

YES

>> END.

NO

>> Replace ambient sensor.

Ambient sensor

—

Continuity

Connector

Terminal

E337

1

Ground

Not existed

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

B2578, B2579 IN-VEHICLE SENSOR

HAC-47

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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B2578, B2579 IN-VEHICLE SENSOR

Description

INFOID:0000000003846332

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

panel.

• 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:0000000003846333

DTC DETECTION LOGIC

NOTE:

JPIIA1019ZZ

JPIIA0613GB

:

Vehicle front

JPIIA0890ZZ

RJIA1804E

HAC-48

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2578, B2579 IN-VEHICLE SENSOR

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

HAC-

42, "DTC Logic"

 or 

HAC-43, "DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

1.

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

2.

Check if any DTC 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-

42, "DTC Logic"

 or 

HAC-43, "DTC Logic"

. 

Is DTC “B2578” or “B2579” displayed?

YES

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

HAC-48, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003846334

1.

CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND

1.

Disconnect in-vehicle sensor connector.

2.

Turn ignition switch ON.

3.

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

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK CIRCUIT 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 and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK IN-VEHICLE SENSOR

Check in-vehicle sensor. Refer to 

HAC-49, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

NO

>> Replace in-vehicle sensor.

DTC

Items

 (CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2578

IN CAR SENSOR (OUT OF RANGE 
[LOW])

Detected temperature at in-vehicle 
sensor 

−

44

°

C (

−

47

°

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 SENSOR (OUT OF RANGE 
[HI])

Detected temperature at in-vehicle 
sensor 100

°

C (212

°

F) or more

(+)

(

−

)

Voltage

In-vehicle sensor

—

Connector

Terminal

M41

1

Ground

Approx. 5 V

In-vehicle sensor

 A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M41

2

M50

37

Existed