Nissan Sentra. Instruction — part 579
HAC-164
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-189, "Removal and Installation"
.
NO
>> Replace air mix door motor. Refer to
HAC-193, "AIR MIX DOOR MOTOR : Removal and Installa-
.
Component Inspection
INFOID:0000000009757753
1.
CHECK AIR MIX DOOR MOTOR
1. Remove air mix door motor. Refer to
HAC-193, "AIR MIX DOOR MOTOR : Removal and Installation"
.
2. Check resistance between air mix door motor terminals. Refer to applicable table for the normal value.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace air mix door motor. Refer to
HAC-193, "AIR MIX DOOR MOTOR : Removal and Installa-
.
Terminal
Resistance (
Ω)
(Approx.)
5
1
90
2
3
4
INTAKE DOOR MOTOR
HAC-165
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
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K
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M
A
B
HAC
N
O
P
INTAKE DOOR MOTOR
Diagnosis Procedure
INFOID:0000000009757754
Regarding Wiring Diagram information, refer to
1.
CHECK INTAKE DOOR MOTOR OPERATION
1. Turn ignition switch ON.
2. Operate intake switch and check by operation sound that intake door motor operates.
Does the intake door motor operate?
YES
>> Refer to
GI-39, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
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 3.
NO
>> Repair harness or connector.
3.
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 4.
NO
>> Repair harness or connector.
4.
CHECK INTAKE DOOR MOTOR
1. Turn ignition switch OFF.
2. Check intake door motor. Refer to
HAC-166, "Component Inspection (Motor)"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace intake door motor. Refer to
HAC-193, "INTAKE DOOR MOTOR : Removal and Installa-
.
5.
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-189, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning parts.
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M48
2
M33 (with instruction A/C)
M29 (without A/C)
35
Yes
6
36
Intake door motor
—
Continuity
Connector
Terminal
M48
2
Ground
No
6
HAC-166
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE DOOR MOTOR
Component Inspection (Motor)
INFOID:0000000009757755
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-193, "INTAKE DOOR MOTOR : Removal and Installa-
.
Terminal
Operation direction
+
−
2
6
FRE
6
2
REC
A/C SWITCH ASSEMBLY SIGNAL CIRCUIT
HAC-167
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
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A
B
HAC
N
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A/C SWITCH ASSEMBLY SIGNAL CIRCUIT
Diagnosis Procedure
INFOID:0000000009757756
Regarding Wiring Diagram information, refer to
1.
CHECK RX (A/C SWITCH ASSEMBLY
→ A/C AUTO AMP.) CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect the A/C switch assembly and the A/C auto amp. connectors.
3. Check continuity between A/C switch assembly harness connector and A/C auto amp. harness connector.
4. Check continuity between A/C switch assembly harness connector M51 terminal 5 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK TX (A/C AUTO AMP.
→ A/C SWITCH ASSEMBLY) CIRCUIT CONTINUITY
1. Check continuity between A/C switch assembly harness connector and A/C auto amp. harness connector.
2. Check continuity between A/C switch assembly harness connector M79 terminal 9 and ground.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for the A/C switch assembly. Refer to
ASSEMBLY : Diagnosis Procedure"
.
NO
>> Repair harness or connector.
A/C switch assembly
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M51
5
M33 (with instruction A/C)
27
Yes
M29 (without A/C)
A/C switch assembly
—
Continuity
Connector
Terminal
M51
5
Ground
No
A/C switch assembly
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M51
13
M33 (with instruction A/C)
28
Yes
M29 (without A/C)
A/C switch assembly
—
Continuity
Connector
Terminal
M51
13
Ground
No
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