Nissan Note E12. Manual - part 378

BLOWER FAN ON SIGNAL

HAC-35

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

NO

>> Repair harness or connector.

3.

CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR SHORT

Check continuity between front air control harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-67, "Removal and Installation"

.

NO

>> Repair harness or connector.

Front air control

—

Continuity

Connector

Terminal

M33

5

Ground

No

HAC-36

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

A/C INDICATOR

A/C INDICATOR

Diagnosis Procedure

INFOID:0000000009477947

Regarding Wiring Diagram information, refer to 

HAC-21, "Wiring Diagram"

.

1.

CHECK A/C INDICATOR POWER SUPPLY

1. Turn ignition switch ON.

2. Check voltage between front air control harness connector and ground.

Is the inspection result normal?

YES

>> Replace front air control. Refer to 

HAC-47, "Removal and Installation"

.

NO

>> Repair harness or connector between front air control and fuse.

+

−

Voltage (V)

(Approx.)

Front air control

Connector

Terminal

M33

15

Ground

Battery voltage

FRONT BLOWER MOTOR

HAC-37

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

FRONT BLOWER MOTOR

Description

INFOID:0000000009477948

The front blower motor utilizes a brush-less motor with a rotating magnet. Quietness is improved over previous

motors where the brush was the point of contact and the coil rotated.

Diagnosis Procedure

INFOID:0000000009477949

Regarding Wiring Diagram information, refer to 

HAC-21, "Wiring Diagram"

.

1.

CHECK SYMPTOM

Check symptom (A or B).

Which symptom is detected?

A

>> GO TO 2.

B

>> GO TO 7.

2.

CHECK FUSE

1. Turn ignition switch OFF.

2. Check 15A fuses (Nos. 20 and 22, located in fuse block (J/B)].

NOTE:

Refer to 

PG-37, "Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the blown fuse after repairing the affected circuit. 

3.

CHECK FRONT BLOWER MOTOR POWER SUPPLY

1. Disconnect front blower motor connector.

2. Turn ignition switch ON.

3. Check voltage between front blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK BLOWER RELAY

1. Turn ignition switch OFF.

2. Check blower relay. Refer to 

HAC-39, "Component Inspection (Blower Relay)"

.

Is the inspection result normal?

YES

>> Repair harness or connector between front blower motor and fuse.

NO

>> Replace blower relay.

5.

CHECK FAN SWITCH GROUND CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

Symptom

A

Front blower motor does not operate at any dial position

B

Front blower motor does not operate at any dial position other than 4th, 
or operation speed is not normal.

+

−

Voltage (V)

(Approx.)

Front blower motor

Connector

Terminal

M62

1

Ground

Battery voltage

HAC-38

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

FRONT BLOWER MOTOR

2. Disconnect front air control connector.

3. Check continuity between front air control harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK FAN SWITCH 4TH POSITION CIRCUIT FOR OPEN

Check continuity between front air control harness connector and front blower motor harness connector.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair the harness or connector.

7.

CHECK FRONT BLOWER MOTOR RESISTOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect front blower motor resistor connector.

3. Turn ignition switch ON.

4. Check voltage between front blower motor resistor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector between front blower motor resistor and front blower motor.

8.

CHECK FAN SWITCH 1ST, 2ND, AND 3RD POSITION CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect front air control.

3. Check continuity between front air control harness connector and front blower motor resistor.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair harness or connector.

9.

CHECK FRONT BLOWER MOTOR RESISTOR

Check front blower motor resistor. Refer to 

HAC-39, "Component Inspection (Front Blower Motor Resistor)"

.

Is the inspection result normal?

YES

>> GO TO 10.

Front air control

—

Continuity

Connector

Terminal

M33

6

Ground

Yes

Front air control

Front blower motor

Continuity

Connector

Terminal

Connector

Terminal

M33

1

M62

2

Yes

+

−

Voltage (V)

(Approx.)

Front blower motor resistor

Connector

Terminal

M151

3

Ground

Battery voltage

Front air control

Front blower motor resistor

Continuity

Connector

Terminal

Connector

Terminal

M33

2

M151

1

Yes

3

4

4

2