Nissan Sentra. Instruction — 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
• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
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
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009757661
Regarding Wiring Diagram information, refer to
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
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