Nissan Quest E52. Manual - part 739

HAC-86

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM SETTING

advanced climate control system is not activated. It is also possible to set the system not to turn A/C switch
ON when AUTO intake switch is pressed.

HOW TO SET

1.

Starts on board self-diagnosis STEP 5 mode (Each sensor recognition temperature check; “51” or “52” is
indicated on front A/C control display).

2.

Press fan switch (up:  +) three times and check that “8” is indicated on front A/C control display.

3.

After approximately 3 seconds, the AUTO intake switch interlocking movement change function can be
available.

4.

Press A/C switch or AUTO intake switch to select the setting as per the following.

NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V
or less, the AUTO intake switch interlocking movement change function setting may be cancelled.

Switch

Switch in-

dicator

Setting

A/C switch

ON

When AUTO intake switch is turned ON, A/C switch is also turned ON in synchronization with AUTO 
intake switch. (Initial setting)
Control of the AUTO intake switch is functional even when the A/C switch is turned OFF. 

OFF

When AUTO intake switch is turned ON, A/C switch is not turned ON in synchronization with AUTO 
intake switch. 
Control of the AUTO intake switch is functional even when A/C switch is turned OFF. 

AUTO intake 
switch

ON

AUTO intake switch can be turned ON when A/C switch is OFF.
When A/C switch is turned OFF while AUTO intake switch is ON, AUTO intake switch is not turned 
OFF in synchronization with A/C switch. (Initial setting)

OFF

AUTO intake switch can not be turned ON when A/C switch is OFF.
When A/C switch is turned OFF while AUTO intake switch is ON, AUTO intake switch is turned OFF 
in synchronization with A/C switch.

POWER SUPPLY AND GROUND CIRCUIT

HAC-87

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

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F

G

H

J

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A

B

HAC

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DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

A/C AUTO AMP.

A/C AUTO AMP. : Diagnosis Procedure

INFOID:0000000009652546

1.

CHECK SYMPTOM

Check symptom (A or B).

Which symptom is detected?

A

>> GO TO 2.

B

>> GO TO 5.

2.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check 10A fuse (No. 3 and 19, located in fuse block (J/B)].
NOTE:
Refer to 

PG-80, "Fuse, Connector and Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown. 

3.

CHECK A/C AUTO AMP. IGNITION POWER SUPPLY AND ACC POWER SUPPLY

1.

Disconnect A/C auto amp. connector. 

2.

Turn ignition switch ON. 

3.

Check voltage between A/C auto amp. harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector between A/C auto amp. and fuse.

4.

CHECK A/C AUTO AMP. GROUND CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

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

Is the inspection result normal?

YES

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

HAC-143, "Removal and Installation"

.

Symptom

A

• Front air conditioning does not activate.
• Front air conditioning cannot be controlled.
• Operation status of front air conditioning is not indicated on display.

B

• Memory function does not operate normally.
• The setting is not maintained. (It returns to the initial condition)

+

−

Voltage

A/C auto amp.

Connector

Terminal

M50

2

Ground

11 – 14 V

9

A/C auto amp.

—

Continuity

Connector

Terminal

M50

21

Ground

Existed

23

HAC-88

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

POWER SUPPLY AND GROUND CIRCUIT

NO

>> Repair harness or connector.

5.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check 15A fuse (No. 6, located in fuse block (J/B)].
NOTE:
Refer to 

PG-80, "Fuse, Connector and Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown. 

6.

CHECK A/C AUTO AMP. BATTERY POWER SUPPLY

1.

Disconnect A/C auto amp. connector. 

2.

Check voltage between A/C auto amp. harness connector and ground. 

Is the inspection result normal?

YES

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

HAC-143, "Removal and Installation"

.

NO

>> Repair harness or connector between A/C auto amp. and fuse.

REAR A/C CONTROL

REAR A/C CONTROL : Diagnosis Procedure

INFOID:0000000009652547

1.

CHECK REAR A/C CONTROL POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect rear A/C control connector. 

3.

Turn ignition switch ON.

4.

Check voltage between rear A/C control harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector between rear A/C control and fuse block (J/B).

2.

CHECK REAR A/C CONTROL GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between rear A/C control harness connector and ground. 

Is the inspection result normal?

+

−

Voltage

A/C auto amp.

Connector

Terminal

M50

1

Ground

11 – 14 V

+

−

Voltage

Rear A/C control

Connector

Terminal

R16 (without rear 

entertainment)

12

Ground

11 – 14 V

R101 (with rear en-

tertainment)

Rear A/C control

—

Continuity

Connector

Terminal

R16 (without rear 

entertainment)

1

Ground

Existed

R101 (with rear en-

tertainment)

POWER SUPPLY AND GROUND CIRCUIT

HAC-89

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

YES

>> Replace rear A/C control. Refer to 

HAC-144, "Removal and Installation"

.

NO

>> Repair harness or connector.