Nissan Note E12. Manual - part 377

A/C ON SIGNAL

HAC-31

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

C

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G

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A

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HAC

N

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DTC/CIRCUIT DIAGNOSIS

A/C ON SIGNAL

Component Function Check

INFOID:0000000009477942

1.

CHECK A/C ON SIGNAL

With CONSULT

1. Turn ignition switch ON.

2. Operate front blower motor.

3. Select “AIR CONDITIONER” of “BCM” using CONSULT.

4. Select “AIR COND SW” in “DATA MONITOR” mode, and check status under the following condition.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Refer to 

HAC-31, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009477943

Regarding Wiring Diagram information, refer to 

HAC-21, "Wiring Diagram"

.

1.

CHECK FUSE

1. Turn ignition switch OFF.

2. Check 10A fuse (No. 21, located in fuse block (J/B)].

NOTE:

Refer to 

PG-37, "Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK THERMO CONTROL AMP. POWER SUPPLY

1. Turn ignition switch OFF. 

2. Disconnect thermo control amp. connector. 

3. Turn ignition switch ON.

4. Check voltage between thermo control amp. harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector between thermo control amp. and fuse.

3.

CHECK THERMO CONTROL AMP. GROUND CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect front air control connector.

3. Check continuity between thermo control amp. harness connector and front air control harness connector. 

Monitor item

Condition

Status

AIR COND SW

A/C switch

ON

On

OFF

Off

+

−

Voltage (V)

(Approx.)

Thermo control amp.

Connector

Terminal

M42

3

Ground

Battery voltage

HAC-32

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

A/C ON SIGNAL

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK A/C ON SIGNAL

1. Turn ignition switch ON.

2. Check output waveform between thermo control amp. harness connector and ground with using oscillo-

scope.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

CHECK FRONT AIR CONTROL

1. Turn ignition switch OFF.

2. Check front air control. Refer to 

HAC-32, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace thermo control amp. Refer to 

HAC-48, "Removal and Installation"

.

NO

>> Replace front air control. Refer to 

HAC-47, "Removal and Installation"

.

6.

CHECK A/C ON SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect BCM connector.

3. Check continuity between thermo control amp. harness connector and BCM harness connector. 

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-67, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000009477944

1.

CHECK A/C CONTROL

Check continuity front air control terminals.

Thermo control amp.

Front air control

Continuity

Connector

Terminal

Connector

Terminal

M42

1

M33

14

Yes

+

−

Output waveform

Thermo control amp.

Connector

Terminal

M42

2

Ground

JPMIA0012GB

Thermo control amp.

BCM

Continuity

Connector

Terminal

Connector

Terminal

M42

2

M18

27

Yes

A/C ON SIGNAL

HAC-33

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace front air control. Refer to 

HAC-47, "Removal and Installation"

.

Terminal

Condition

Continuity

14

6

A/C switch: ON
Fan control dial: Except OFF position

Yes

HAC-34

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

BLOWER FAN ON SIGNAL

BLOWER FAN ON SIGNAL

Component Function Check

INFOID:0000000009477945

1.

CHECK BLOWER FAN ON SIGNAL

With CONSULT

1. Turn ignition switch ON.

2. Select “AIR CONDITIONER” of “BCM” using CONSULT.

3. Select “FAN ON SIG” in “DATA MONITOR” mode, and check status under the following condition.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Refer to 

HAC-34, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009477946

Regarding Wiring Diagram information, refer to 

HAC-21, "Wiring Diagram"

.

1.

CHECK BLOWER FAN ON SIGNAL

1. Turn ignition switch OFF.

2. Disconnect front air control harness connector.

3. Turn ignition switch ON.

4. Check output waveform between front air control and ground with using oscilloscope.

Is the inspection result normal?

YES

>> Replace front air control. Refer to 

HAC-47, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect BCM connector.

3. Check continuity front air control harness connector and BCM harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

Monitor item

Condition

Status

FAN ON SIG

Fan control dial

Except OFF position

On

OFF position

Off

+

−

Output waveform

Front air control

Connector

Terminal

M33

5

Ground

PKIB4960J

Front air control

BCM

Continuity

Connector

Terminal

Connector

Terminal

M33

5

M18

28

Yes