Nissan Sentra. Instruction — part 578
HAC-160
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT
YES
>> Inspection End.
NO
>> Perform trouble diagnosis for the A/C switch assembly. Refer to
ASSEMBLY : Diagnosis Procedure"
.
A/C SWITCH ASSEMBLY : Diagnosis Procedure
INFOID:0000000009757749
Regarding Wiring Diagram information, refer to
1.
CHECK A/C SWITCH ASSEMBLY POWER SUPPLY
1. Disconnect the A/C switch assembly connector.
2. Turn ignition switch ON.
3. Check voltage between A/C switch assembly harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FUSE
Check 10A fuse [No.5, located in the fuse block (J/B)].
NOTE:
.
Is the inspection result normal?
YES
>> Check harness for open circuit. Repair or replace if necessary.
NO
>> Check harness for short circuit. Repair or replace if necessary.
3.
CHECK A/C SWITCH ASSEMBLY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C switch assembly harness connector and ground.
Is the inspection result normal?
YES
>> Replace the A/C switch assembly. Refer to
HAC-188, "Removal and Installation"
.
NO
>> Repair the harnesses or connectors.
(+)
(
−)
Voltage
(Approx.)
A/C switch assembly
Connector
Terminal
M51
1
Ground
Battery voltage
A/C switch assembly
—
Continuity
Connector
Terminal
M51
9
Ground
Yes
MODE DOOR MOTOR
HAC-161
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
MODE DOOR MOTOR
Diagnosis Procedure
INFOID:0000000009757750
Regarding Wiring Diagram information, refer to
1.
CHECK MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect mode door motor connector.
3. Turn ignition switch ON.
4. Check voltage between mode door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector between mode door motor and fuse.
2.
CHECK MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between mode 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 MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT
Check continuity between mode 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 MODE DOOR MOTOR
Check mode door motor. Refer to
HAC-162, "Component Inspection"
.
+
−
Voltage
Mode door motor
Connector
Terminal
M126
5
Ground
Battery voltage
Mode door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M126
4
M33 (with instruction A/C)
M29 (without A/C)
37
Yes
3
38
2
39
1
40
Mode door motor
—
Continuity
Connector
Terminal
M126
4
Ground
No
3
2
1
HAC-162
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MODE DOOR MOTOR
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-189, "Removal and Installation"
.
NO
>> Replace mode door motor. Refer to
HAC-193, "MODE DOOR MOTOR : Removal and Installa-
.
Component Inspection
INFOID:0000000009757751
1.
CHECK MODE DOOR MOTOR
1. Remove mode door motor. Refer to
HAC-193, "MODE DOOR MOTOR : Removal and Installation"
2. Check resistance between mode door motor terminals. Refer to applicable table for the normal value.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace mode door motor. Refer to
HAC-193, "MODE DOOR MOTOR : Removal and Installa-
.
Terminal
Resistance (
Ω)
(Approx.)
5
1
90
2
3
4
AIR MIX DOOR MOTOR
HAC-163
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
AIR MIX DOOR MOTOR
Diagnosis Procedure
INFOID:0000000009757752
Regarding Wiring Diagram information, refer to
1.
CHECK AIR MIX DOOR MOTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect air mix door motor connector.
3. Turn ignition switch ON.
4. Check voltage between air mix door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector between air mix door motor and fuse.
2.
CHECK AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between air mix 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 AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT
Check continuity between air mix 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 AIR MIX DOOR MOTOR
Check air mix door motor. Refer to
HAC-164, "Component Inspection"
.
+
−
Voltage
Air mix door motor
Connector
Terminal
M127
5
Ground
Battery voltage
Air mix door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M127
1
M33 (with instruction A/C)
M29 (without A/C)
34
Yes
2
33
3
32
4
31
Air mix door motor
—
Continuity
Connector
Terminal
M127
1
Ground
No
2
3
4
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