Nissan Sentra. Manual — part 558
HAC-80
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
B27A0, B27A1 INTAKE DOOR MOTOR
YES
>> GO TO 3.
NO
>> GO TO 7.
3.
CHECK INTAKE DOOR MOTOR PBR GROUND CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN
Check continuity between intake door motor 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 DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK INTAKE DOOR MOTOR PBR
Check intake door motor PBR. Refer to
HAC-81, "Component Inspection (PBR)"
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-105, "Removal and Installation"
.
NO
>> Replace intake door motor. Refer to
HAC-112, "INTAKE DOOR MOTOR : Removal and Installa-
.
7.
CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-105, "Removal and Installation"
.
NO
>> Repair harness or connector.
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M58
3
M34
10
Yes
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M58
2
M34
22
Yes
Intake door motor
—
Continuity
Connector
Terminal
M58
2
Ground
No
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M58
1
M34
8
Yes
B27A0, B27A1 INTAKE DOOR MOTOR
HAC-81
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
8.
CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect intake door motor connector, and A/C auto amp. connector.
3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair harness or connector.
9.
CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair harness or connector.
10.
CHECK INTAKE DOOR MOTOR
1. Turn ignition switch OFF.
2. Check intake door motor. Refer to
HAC-82, "Component Inspection (Motor)"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace intake door motor. Refer to
HAC-112, "INTAKE DOOR MOTOR : Removal and Installa-
.
11.
CHECK INSTALLATION OF INTAKE DOOR MOTOR SYSTEM
Check intake door motor system is properly installed. Refer to
.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-105, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning parts.
Component Inspection (PBR)
INFOID:0000000009757677
1.
CHECK INTAKE DOOR MOTOR PBR
Check resistance between intake door motor terminals.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace intake door motor. Refer to
HAC-112, "INTAKE DOOR MOTOR : Removal and Installa-
.
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M58
5
M34
35
Yes
6
36
Intake door motor
—
Continuity
Connector
Terminal
M58
5
Ground
No
6
Terminal
Resistance (
Ω)
1
2
Except 0 or
∞
3
HAC-82
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
B27A0, B27A1 INTAKE DOOR MOTOR
Component Inspection (Motor)
INFOID:0000000009757678
1.
CHECK INTAKE DOOR MOTOR
Supply intake door motor terminals with battery voltage and check by visually and operation sound that intake
door motor operates.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace intake door motor. Refer to
HAC-112, "INTAKE DOOR MOTOR : Removal and Installa-
.
Terminal
Operation direction
+
−
5
6
FRE
6
5
REC
POWER SUPPLY AND GROUND CIRCUIT
HAC-83
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis Procedure
INFOID:0000000009757679
Regarding Wiring Diagram information, refer to
1.
CHECK FUSE
Check fuses [No. 5, 8 and 21, located in the fuse block (J/B)].
NOTE:
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit.
2.
CHECK A/C AUTO AMP. POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check voltage between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector between A/C auto amp. and fuse block (J/B).
3.
CHECK A/C AUTO AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair harness or connector.
A/C SWITCH ASSEMBLY
A/C SWITCH ASSEMBLY : Component Function Check
INFOID:0000000009757680
1.
CHECK OPERATION
1. Press the AUTO switch, and then check that “AUTO” is shown on the display.
2. Operate the temperature control switch (driver side). Check that the fan speed or outlet changes. (The
discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.)
Does it operate normally?
YES
>> Inspection End.
+
−
Voltage
A/C auto amp.
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M34
11
Ground
Approx. 0 V
Approx. 0 V
Battery voltage
12
Battery voltage
Battery voltage
Battery voltage
21
Approx. 0 V
Battery voltage
Battery voltage
A/C auto amp.
—
Continuity
Connector
Terminal
M34
30
Ground
Yes
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