Nissan Sentra. Manual - 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 

HAC-160, "A/C SWITCH

ASSEMBLY : Diagnosis Procedure"

.

A/C SWITCH ASSEMBLY : Diagnosis Procedure

INFOID:0000000009757749

Regarding Wiring Diagram information, refer to 

HAC-145, "Wiring Diagram"

 or 

HAC-152, "Wiring Diagram"

.

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:

Refer to 

PG-47, "Terminal Arrangement"

.

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 

HAC-145, "Wiring Diagram"

 or 

HAC-152, "Wiring Diagram"

.

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 manual 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-

tion"

.

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-

tion"

.

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 

HAC-145, "Wiring Diagram"

 or 

HAC-152, "Wiring Diagram"

.

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 manual 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