Nissan Quest E52. Manual - part 772

HAC-218

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

A/C ON SIGNAL

A/C ON SIGNAL

Component Function Check

INFOID:0000000009652658

1.

CHECK A/C ON SIGNAL

With CONSULT

1.

Turn ignition switch ON.

2.

Operate blower motor.

3.

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

4.

Select “AIR COND SW” in “DATA MONITOR” mode.

5.

Check A/C ON signal when the A/C switch is operated.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

HAC-218, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009652659

1.

CHECK A/C ON SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect A/C amp. connector.

3.

Turn ignition switch ON.

4.

Check output waveform between A/C amp. harness connector and ground with using oscilloscope.

Is the inspection result normal?

YES

>> Replace front A/C control (A/C amp.). Refer to 

HAC-238, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK A/C ON SIGNAL CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between A/C amp. harness connector and BCM harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

Monitor item

Condition

Status

AIR COND SW

A/C switch

ON (A/C indicator: 
ON)

On

OFF (A/C indicator: 
OFF)

Off

+

−

Output waveform

A/C amp.

Connector

Terminal

M49

13

Ground

JPMIA0012GB

A/C amp.

BCM

Continuity

Connector

Terminal

Connector

Terminal

M49

13

M121

27

Existed

A/C ON SIGNAL

HAC-219

< 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 A/C ON SIGNAL CIRCUIT FOR SHORT

Check continuity between A/C amp. harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

NO

>> Repair harness or connector.

A/C amp.

—

Continuity

Connector

Terminal

M49

13

Ground

Not existed

HAC-220

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

BLOWER FAN ON SIGNAL

BLOWER FAN ON SIGNAL

Component Function Check

INFOID:0000000009652660

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.

4.

Check blower fan ON signal when the fan switch is operated.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

HAC-220, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009652661

1.

CHECK BLOWER FAN ON SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect A/C amp. harness connector.

3.

Turn ignition switch ON.

4.

Check output waveform between A/C amp. and ground with using oscilloscope.

Is the inspection result normal?

YES

>> Replace front A/C control (A/C amp.). Refer to 

HAC-238, "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 A/C amp. harness connector and BCM harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR SHORT

Monitor item

Condition

Status

FAN ON SIG

Fan switch

OFF position

Off

Except OFF position

On

+

−

Output waveform

A/C amp.

Connector

Terminal

M49

12

Ground

PKIB4960J

A/C amp.

BCM

Continuity

Connector

Terminal

Connector

Terminal

M49

12

M121

28

Existed

BLOWER FAN ON SIGNAL

HAC-221

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Check continuity between A/C amp. harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

NO

>> Repair harness or connector.

A/C amp.

—

Continuity

Connector

Terminal

M49

12

Ground

Not existed