Nissan Cube. Manual - part 551

HAC-42

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

SUNLOAD SENSOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the sunload sensor. 

4.

CHECK SUNLOAD SENSOR OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the A/C auto amp. connector. 

3.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

5.

CHECK SUNLOAD SENSOR SHORT CIRCUIT

Check continuity between sunload sensor harness connector and the ground. 

Is the inspection result normal?

YES

>> Replace the A/C auto amp.

NO

>> Repair the harnesses or connectors.

Component Inspection

INFOID:0000000009950990

1.

CHECK SUNLOAD SENSOR

1.

Turn the ignition switch ON.

2.

Check the input voltage from sunload sensor between A/C auto amp. harness connector and the ground.
Refer to the applicable table for the normal value. 

Sunload sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M74

1

M51

25

Existed

Sunload sensor

—

Continuity

Connector

Terminal

M74

1

Ground

Not existed

(+)

(

−

)

A/C auto amp.

—

Connector

Terminal

M51

25

Ground

SUNLOAD SENSOR

HAC-43

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

NOTE:
• When checking indoors, use a lamp of approximately 60 W. Move the lamp towards and away from the

sensor to check. 

• The sunload amount produced by direct sunshine in fair weather is equivalent to approximately 0.77

kW/m

2

 (662 kcal/m

2

·h). 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the sunload sensor. 

JPIIA1659GB

HAC-44

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

AIR MIX DOOR MOTOR

AIR MIX DOOR MOTOR

Description

INFOID:0000000009950991

COMPONENT DESCRIPTION

• The air mix door motor (1) is installed to the A/C unit assembly. 
• The step motor system is adopted for air mix door motor.
• When a drive signal is input from auto amp. to door motor, a step

motor built into the door the door motor rotates according to the
drive signal, and then stops at the position of target door.

DRIVE SYSTEM OF STEP MOTOR TYPE DOOR MOTOR

• Motor is actuated in sequence by energizing four drive coils.
• Rotation direction can be changed by changing pattern of excitation.

Diagnosis Procedure

INFOID:0000000009950992

1.

CHECK FUSE

Check 10A fuse [No. 2, located in the fuse block (J/B)].
NOTE:
Refer to 

PG-77, "Fuse, Connector and Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace fuse after repairing the applicable circuit.

2.

CHECK POWER SUPPLY OF AIR MIX DOOR MOTOR 

1.

Turn the ignition switch OFF.

2.

Disconnect the air mix door motor connector.

3.

Turn the ignition switch ON.

4.

Check voltage between air mix door motor harness connector and the ground. 

JPIIA1752ZZ

SJIA0970E

(+)

(

−

)

Voltage

(Approx.)

Air mix door motor

—

Connector

Terminal

M55

2

Ground

Battery voltage

AIR MIX DOOR MOTOR

HAC-45

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND AIR MIX DOOR MOTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the A/C auto amp. connector. 

3.

Check continuity between air mix door motor harness connector and the ground. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND GROUND

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

5.

CHECK AIR MIX DOOR MOTOR

Perform the component inspection of air mix door motor. Refer to 

HAC-45, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace the A/C auto amp.

NO

>> Replace the air mix door motor.

Component Inspection

INFOID:0000000009950993

1.

CHECK AIR MIX DOOR MOTOR

1.

Turn the ignition switch OFF.

2.

Remove the air mix door motor. Refer to 

HAC-130, "Exploded View"

.

3.

Check the resistance between air mix door motor terminals. Refer to the applicable table for the normal
value. 

Air mix door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M55

3

M50

17

Existed

6

18

1

19

4

20

A/C auto amp.

—

Continuity

Connector

Terminal

M50

17

Ground

Not Existed

18

19

20

Terminal

Resistance: 

Ω

(Approx.)

2

1

90

3

4

6