Nissan Teana J32. Manual — part 669
B257B, B257C AMBIENT SENSOR
HAC-45
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
C
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A
B
HAC
N
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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
.
• 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
.
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
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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HAC
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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
.
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
.
Is DTC “B2578” or “B2579” displayed?
YES
>> Perform trouble diagnosis for the in-vehicle sensor. Refer to
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
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