NISSAN TEANA 2008 Service Manual

U1010 CONTROL UNIT (CAN)
HAC-43
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U1010 CONTROL UNIT (CAN)
DescriptionINFOID:0000000003846325
Initial diagnosis of A/C auto amp.
DTC LogicINFOID:0000000003846326
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003846327
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
Is DTC
“U1010” displayed?
YES >> Replace A/C auto amp.
NO >> INSPECTION END.
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
U1010 CONTROL UNIT (CAN)When detecting error during the initial diag-
nosis of CAN controller of A/C auto amp.A/C auto amp.

HAC-44
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
B257B, B257C AMBIENT SENSOR
B257B, B257C AMBIENT SENSOR
DescriptionINFOID:0000000003846328
COMPONENT DESCRIPTION
Ambient Sensor
 The ambient sensor (1) is installed behind left side of front bumper.
 It detects ambient temperature and converts it into a resistance
value which is then input into the A/C auto amp.
Ambient Sensor Circuit
AMBIENT TEMPERATURE INPUT PROCESS
The A/C auto amp. equips a processing circuit for the ambient sensor input. However, when the temperature
detected by the ambient sensor increases quickly, the processing circuit retards the A/C auto amp. function. It
only allows the A/C auto amp. to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100 sec-
onds.
As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the ambient sensor increases. This is because the
heat from the engine compartment can radiate to the front bumper area, the location of the ambient sensor.
DTC LogicINFOID:0000000003846329
DTC DETECTION LOGIC
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.
DTC CONFIRMATION PROCEDURE
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
JPIIA0898ZZ
JPIIA0612GB
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
B257B AMB TEMP SEN (SHORT)Detected temperature at ambient sensor
−44°C (−47°F) or less Ambient sensor
 A/C auto amp.
 Harness and connector
(Ambient sensor circuit is open,
or there is a short in the circuit) B257C AMB TEMP SEN (OPEN)Detected temperature at ambient sensor
100°C (212°F) or more

B257B, B257C AMBIENT SENSOR
HAC-45
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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 ProcedureINFOID: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.
(+) (−)
Vo l ta g e 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 InspectionINFOID: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
Te r m i n a lCondition
Resistance kΩ
Temperature °C (°F)
12−15 (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
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B2578, B2579 IN-VEHICLE SENSOR
DescriptionINFOID: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 LogicINFOID: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 ProcedureINFOID: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.
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
B2578IN 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) B2579IN CAR SENSOR (OUT OF RANGE
[HI])Detected temperature at in-vehicle
sensor 100°C (212°F) or more
(+) (−)
Vol tag e 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

B2578, B2579 IN-VEHICLE SENSOR
HAC-49
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4.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.
4. Check continuity between in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES >> Replace A/C auto amp.
NO >> Repair harness or connector.
Component InspectionINFOID:0000000003846335
1.CHECK IN-VEHICLE SENSOR
1. Turn ignition switch OFF.
2. Disconnect in-vehicle sensor connector. Refer to VTL-25, "
Exploded View".
3. Check resistance between in-vehicle sensor terminals.
Is the inspection result normal?
YES >> END.
NO >> Replace in-vehicle sensor.
In-vehicle sensor A/C auto amp.
Continuity
Connector Terminal Connector Terminal
M41 1 M50 36 Existed
In-vehicle sensor
—Continuity
Connector Terminal
M41 1 Ground Not existed
Te r m i n a lCondition
Resistance kΩ
Temperature °C (°F)
12−15 (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-50
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
B2581, B2582 INTAKE SENSOR
B2581, B2582 INTAKE SENSOR
DescriptionINFOID:0000000003846336
Intake Sensor
 The intake sensor (2) is located on the evaporator (1).
 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 LogicINFOID:0000000003846337
DTC DETECTION LOGIC
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".
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
“B2581” or “B2582” displayed?
YES >> Perform trouble diagnosis for the intake sensor. Refer to HAC-50, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003846338
1.CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
JPIIA0907ZZ
JPIIA0614GB
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
B2581 EVAP TEMP SEN (SHORT)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 EVAP TEMP SEN (OPEN)Detected temperature at intake sensor
69°C (156°F) or more

B2581, B2582 INTAKE SENSOR
HAC-51
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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-51, "
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 InspectionINFOID:0000000003846339
1.CHECK INTAKE SENSOR
1. Turn ignition switch OFF.
2. Disconnect intake sensor connector.
3. Check resistance between intake sensor terminals.
(+) (−)
Vo l ta g e Intake sensor
—
Connector Terminal
M42 2 Ground Approx. 5 V
Intake sensor A/C auto amp.
Continuity
Connector Terminal Connector Terminal
M42 1 M50 37 Existed
Intake sensor A/C auto amp.
Continuity
Connector Terminal Connector Terminal
M42 2 M50 16 Existed
Intake sensor
—Continuity
Connector Terminal
M42 2 Ground Not existed

HAC-52
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
B2581, B2582 INTAKE SENSOR
Is the inspection result normal?
YES >> END.
NO >> Replace intake sensor.
Te r m i n a lCondition
Resistance kΩ
Temperature °C (°F)
12−15 (5) 17.73
−10 (14) 13.46
−5 (23) 10.33
0 (32) 8.00
5 (41) 6.26
10 (50) 4.93
15 (59) 3.92
20 (68) 3.14
25 (77) 2.54
30 (86) 2.06
35 (95) 1.69
40 (104) 1.39
45 (113) 1.15