Nissan Sentra. Manual — part 580
HAC-168
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
A/C ON SIGNAL
A/C ON SIGNAL
Component Function Check
INFOID:0000000009757757
1.
CHECK A/C ON SIGNAL
With CONSULT
1. Turn ignition switch ON.
2. Operate blower motor.
3. Select “AIR CONDITIONER” of “BCM” using CONSULT.
4. Select “AIR COND SW” in “DATA MONITOR” mode.
5. Check A/C ON signal when the A/C switch is operated.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Refer to
HAC-168, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000009757758
Regarding Wiring Diagram information, refer to
1.
CHECK A/C ON SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Turn ignition switch ON.
4. Check output waveform between A/C auto amp. harness connector and ground with using oscilloscope.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-189, "Removal and Installation"
.
NO
>> GO TO 2.
2.
CHECK A/C ON SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between A/C auto amp. harness connector and BCM harness connector.
Monitor item
Condition
Status
AIR COND SW
A/C switch
ON (A/C indicator:
ON)
On
OFF (A/C indicator:
OFF)
Off
+
−
Output waveform
A/C auto amp.
Connector
Terminal
M33
15
Ground
JPMIA0012GB
A/C ON SIGNAL
HAC-169
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL 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 A/C ON SIGNAL CIRCUIT FOR SHORT
Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-73, "Removal and Installation"
(with Intelligent Key system) or
126, "Removal and Installation"
(without Intelligent Key system).
NO
>> Repair harness or connector.
A/C auto amp.
BCM
Continuity
Connector
Terminal
Connector
Terminal
M33
15
M21 (without Intelligent Key system)
27
Yes
M84 (with Intelligent Key system)
A/C auto amp.
—
Continuity
Connector
Terminal
M33
15
Ground
No
HAC-170
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE SENSOR
INTAKE SENSOR
Diagnosis Procedure
INFOID:0000000009757759
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.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INTAKE SENSOR
Check intake sensor. Refer to
HAC-171, "Component Inspection"
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-189, "Removal and Installation"
.
NO
>> Replace intake sensor. Refer to
HAC-190, "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.
+
−
Voltage
(Approx.)
Intake sensor
Connector
Terminal
M68
1
Ground
5 V
Intake sensor
—
Continuity
Connector
Terminal
M68
2
Ground
Yes
Intake sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M68
1
M33
3
Yes
INTAKE SENSOR
HAC-171
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL 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 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-189, "Removal and Installation"
.
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000009757760
1.
CHECK INTAKE SENSOR
1. Turn ignition switch OFF.
2. Disconnect intake sensor connector.
3. Check resistance between intake sensor terminals.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace intake sensor. Refer to
HAC-190, "Removal and Installation"
Intake sensor
—
Continuity
Connector
Terminal
M68
1
Ground
No
+
−
Voltage
(Approx.)
Intake sensor
Connector
Terminal
M68
1
Ground
0 V
Terminal
Condition
Resistance: k
Ω
Temperature:
°C (°F)
1
2
−15 (5)
17.73
−10 (14)
13.46
−5 (23)
10.33
0 (32)
8.00
5 (41)
6.25
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
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