Nissan Juke (2012 year). Service Repair Manual - part 142

HAC-50

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B257B, B257C AMBIENT SENSOR

B257B, B257C AMBIENT SENSOR

DTC Logic

INFOID:0000000007577605

DTC DETECTION LOGIC 

NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

45, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. 

HAC-46,

"DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-50, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000007577606

1.

CHECK AMBIENT SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect ambient sensor connector. 

3.

Turn ignition switch ON.

4.

Check voltage between ambient sensor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK AMBIENT SENSOR GROUND CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector. 

3.

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

Is the inspection result normal?

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B257B

AMBIENT SENSOR

The ambient sensor recognition temperature is 
too high [more than 100

°

C (212

°

F)].

• Ambient sensor
• A/C auto amp.
• Harness or connectors

(The sensor circuit is open or short-
ed.)

B257C

The ambient sensor recognition temperature is 
too low [less than 

−

42

°

C (

−

44

°

F)].

+

−

Voltage

(Approx.)

Ambient sensor

Connector

Terminal

E53

1

Ground

5 V

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E53

2

M50

10

Existed

Revision: 2011 October

2012 JUKE

B257B, B257C AMBIENT SENSOR

HAC-51

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK AMBIENT SENSOR

Check ambient sensor. Refer to 

HAC-51, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Replace ambient sensor. Refer to 

HAC-86, "Removal and Installation"

.

4.

CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector. 

3.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check continuity between ambient sensor harness connector and ground. 

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000007577607

1.

CHECK AMBIENT SENSOR

1.

Remove ambient sensor. Refer to 

HAC-86, "Removal and Installation"

. 

2.

Check resistance between ambient sensor terminals. Refer to applicable table for the normal value. 

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E53

1

M50

4

Existed

Ambient sensor

—

Continuity

Connector

Terminal

E53

1

Ground

Not existed

Revision: 2011 October

2012 JUKE

HAC-52

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B257B, B257C AMBIENT SENSOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ambient sensor. Refer to 

HAC-86, "Removal and Installation"

.

Terminal

Condition

Resistance: k

Ω

Temperature: 

°

C (

°

F) 

1

2

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32) 

6.19

5 (41) 

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

Revision: 2011 October

2012 JUKE

B2581, B2582 INTAKE SENSOR

HAC-53

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B2581, B2582 INTAKE SENSOR

DTC Logic

INFOID:0000000007577608

DTC DETECTION LOGIC 

NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

45, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. 

HAC-46,

"DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-53, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000007577609

1.

CHECK INTAKE SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect intake sensor connector. 

3.

Turn ignition switch ON.

4.

Check voltage between intake sensor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK INTAKE SENSOR GROUND CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector. 

3.

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

Is the inspection result normal?

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2581

INTAKE SENSOR

The intake sensor recognition temperature is 
too high [more than 100

°

C (212

°

F)].

• Intake sensor
• A/C auto amp.
• Harness or connectors

(The sensor circuit is open or short-
ed.)

B2582

The intake sensor recognition temperature is 
too low [less than 

−

42

°

C (

−

44

°

F)].

+

−

Voltage

(Approx.)

Intake sensor

Connector

Terminal

M42

1

Ground

5 V

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

2

M50

10

Existed

Revision: 2011 October

2012 JUKE

HAC-54

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2581, B2582 INTAKE SENSOR

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTAKE SENSOR

Check intake sensor. Refer to 

HAC-54, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Replace intake sensor. Refer to 

HAC-89, "Removal and Installation"

.

4.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector. 

3.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check continuity between intake sensor harness connector and ground. 

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000007577610

1.

CHECK INTAKE SENSOR

1.

Remove intake sensor. Refer to 

HAC-89, "Removal and Installation"

.

2.

Check resistance between intake sensor terminals. Refer to applicable table for the normal value. 

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

1

M50

3

Existed

Intake sensor

—

Continuity

Connector

Terminal

M42

1

Ground

Not existed

Revision: 2011 October

2012 JUKE

B2581, B2582 INTAKE SENSOR

HAC-55

< 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

>> INSPECTION END

NO

>> Replace intake sensor. Refer to 

HAC-89, "Removal and Installation"

.

Terminal

Condition

Resistance: k

Ω

Temperature: 

°

C (

°

F)

1

2

−

15 (5)

12.34

−

10 (14)

9.62

−

5 (23)

7.56

0 (32)

6.00

5 (41)

4.80

10 (50)

3.87

15 (59)

3.15

20 (68)

2.57

25 (77)

2.12

30 (86)

1.76

35 (95)

1.47

40 (104)

1.23

45 (113)

1.04

Revision: 2011 October

2012 JUKE

HAC-56

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2630, B2631 SUNLOAD SENSOR

B2630, B2631 SUNLOAD SENSOR

DTC Logic

INFOID:0000000007577611

DTC DETECTION LOGIC 

NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

45, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. 

HAC-46,

"DTC Logic"

.

• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.

When performing the diagnosis indoors, use a lamp (60 W or more) that is pointed at the sunload sensor.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-56, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000007577612

1.

CHECK SUNLOAD SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect sunload sensor connector. 

3.

Turn ignition switch ON.

4.

Check voltage between sunload sensor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK SUNLOAD SENSOR GROUND CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector. 

3.

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

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2630

SUNLOAD SENSOR

Detected calorie at sunload sensor 1677 W/m

2

 

(1442 kcal/m

2

·h) or more.

• Sunload sensor
• A/C auto amp.
• Harness or connectors

(The sensor circuit is open or short-
ed.)

B2631

Detected calorie at sunload sensor 33 W/m

2

 (28 

kcal/m

2

·h) or less.

+

−

Voltage

(Approx.)

Sunload sensor

Connector

Terminal

M74

1

Ground

5 V

Sunload sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M74

2

M50

10

Existed

Revision: 2011 October

2012 JUKE

B2630, B2631 SUNLOAD SENSOR

HAC-57

< 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 harness or connector.

3.

CHECK SUNLOAD SENSOR

1.

Disconnect A/C auto amp. connector. 

2.

Check sunload sensor. Refer to 

HAC-57, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Replace sunload sensor. Refer to 

HAC-88, "Removal and Installation"

.

4.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect 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 harness or connector.

5.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check continuity between sunload sensor harness connector and ground. 

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000007577613

1.

CHECK SUNLOAD SENSOR

1.

Turn ignition switch ON.

2.

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

Sunload sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M74

1

M50

5

Existed

Sunload sensor

—

Continuity

Connector

Terminal

M74

1

Ground

Not existed

A/C auto amp.

Connector

+

−

Terminal

Terminal

M50

5

30

Revision: 2011 October

2012 JUKE

HAC-58

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2630, B2631 SUNLOAD SENSOR

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 sunload sensor. Refer to 

HAC-88, "Removal and Installation"

.

JPIIA1659GB

Revision: 2011 October

2012 JUKE

B27A0, B27A1 INTAKE DOOR MOTOR

HAC-59

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B27A0, B27A1 INTAKE DOOR MOTOR 

DTC Logic

INFOID:0000000007577614

DTC DETECTION LOGIC 

NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

45, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. 

HAC-46,

"DTC Logic"

.

*: A/C auto amp. operates intake door motor according to target value of PBR opening angle at 40% when per-
forming self-diagnosis.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start engine.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-59, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000007577615

1.

CHECK INTAKE DOOR MOTOR OPERATION

1.

Turn ignition switch ON.

2.

Operate intake switch and check by operation sound that intake door motor operates.

Does the intake door motor operate?

YES

>> GO TO 2.

NO

>> GO TO 8.

2.

CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY

1.

Disconnect intake door motor connector.

2.

Turn ignition switch ON.

3.

Check voltage between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 7.

3.

CHECK INTAKE DOOR MOTOR PBR GROUND CIRCUIT FOR OPEN

DTC

Items

(CONSULT screen terms)

DTC detection condition

*

Possible cause

B27A0

INTAKE DOOR MOTOR

PBR opening angle of intake door motor is 50% 
or more. (PBR feedback signal voltage of intake 
door motor is 2.5 V or more)

• Intake door motor
• Intake door motor system installa-

tion condition

• A/C auto amp.
• Harness or connectors

(The motor circuit is open or short-
ed.)

B27A1

PBR opening angle of intake door motor is 30% 
or less. (PBR feedback signal voltage of intake 
door motor is 1.5 V or less)

+

−

Voltage

(Approx.)

Intake door motor

Connector

Terminal

M54

1

Ground

5 V

Revision: 2011 October

2012 JUKE

HAC-60

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B27A0, B27A1 INTAKE DOOR MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN

Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT

Check continuity between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK INTAKE DOOR MOTOR PBR

Check intake door motor PBR. Refer to 

HAC-61, "Component Inspection (PBR)"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Replace intake door motor. Refer to 

HAC-93, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

7.

CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Repair harness or connector.

8.

CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect intake door motor connector, and A/C auto amp. connector.

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

3

M50

10

Existed

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

2

M50

22

Existed

Intake door motor

—

Continuity

Connector

Terminal

M54

2

Ground

Not existed

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

1

M50

8

Existed

Revision: 2011 October

2012 JUKE

B27A0, B27A1 INTAKE DOOR MOTOR

HAC-61

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

3.

Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair harness or connector.

9.

CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT

Check continuity between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair harness or connector.

10.

CHECK INTAKE DOOR MOTOR 

1.

Turn ignition switch OFF.

2.

Check intake door motor. Refer to 

HAC-61, "Component Inspection (Motor)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace intake door motor. Refer to 

HAC-93, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

11.

CHECK INSTALLATION OF INTAKE DOOR MOTOR SYSTEM

Check intake door motor system is properly installed. Refer to 

HAC-92, "Exploded View"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

Component Inspection (PBR)

INFOID:0000000007577616

1.

CHECK INTAKE DOOR MOTOR PBR

Check resistance between intake door motor terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace intake door motor. Refer to 

HAC-93, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

Component Inspection (Motor)

INFOID:0000000007577617

1.

CHECK INTAKE DOOR MOTOR

Supply intake door motor terminals with battery voltage and check by visually and operation sound that intake
door motor operates.

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

5

M50

35

Existed

6

36

Intake door motor

—

Continuity

Connector

Terminal

M54

5

Ground

Not existed

6

Terminal

Resistance (

Ω

)

1

2

Except 0 or 

∞

3

Revision: 2011 October

2012 JUKE

HAC-62

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B27A0, B27A1 INTAKE DOOR MOTOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace intake door motor. Refer to 

HAC-93, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

Terminal

Operation direction

+

−

5

6

REC

6

5

FRE

Revision: 2011 October

2012 JUKE

B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR

HAC-63

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR

DTC Logic

INFOID:0000000007577618

DTC DETECTION LOGIC 

NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

45, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. 

HAC-46,

"DTC Logic"

.

• If air mix door motors DTC (B27A2 – B27A5) are detected, there is probably a disconnected connector or an

open circuit in air mix door motor drive power supply harness.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-63, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000007577619

1.

CHECK AIR MIX DOOR MOTOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect air mix door motor connector.

3.

Turn ignition switch ON.

4.

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

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector between air mix door motor and fuse.

2.

CHECK AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

Check continuity between air mix door motor harness connector and A/C auto amp. harness connector.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27A2

DR AIR MIX DOOR MOT

Short or open circuit of air mix door motor drive 
signal terminal 1.

• Air mix door motor
• A/C auto amp.
• Harness or connectors

(The motor circuit is open or short-
ed.)

B27A3

Short or open circuit of air mix door motor drive 
signal terminal 2.

B27A4

Short or open circuit of air mix door motor drive 
signal terminal 3.

B27A5

Short or open circuit of air mix door motor drive 
signal terminal 4.

+

−

Voltage

Air mix door motor

Connector

Terminal

M55

2

Ground

Battery voltage

Revision: 2011 October

2012 JUKE

HAC-64

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT

Check continuity between air mix door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK AIR MIX DOOR MOTOR

Check air mix door motor. Refer to 

HAC-64, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-85, "Removal and Installation"

.

NO

>> Replace air mix door motor. Refer to 

HAC-94, "AIR MIX DOOR MOTOR : Removal and Installa-

tion"

.

Component Inspection

INFOID:0000000007577620

1.

CHECK AIR MIX DOOR MOTOR

1.

Remove air mix door motor. Refer to 

HAC-94, "AIR MIX DOOR MOTOR : Removal and Installation"

.

2.

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace air mix door motor. Refer to 

HAC-94, "AIR MIX DOOR MOTOR : Removal and Installa-

tion"

.

Air mix door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M55

3

M50

17

Existed

6

18

1

19

4

20

Air mix door motor

—

Continuity

Connector

Terminal

M55

3

Ground

Not existed

6

1

4

Terminal

Resistance (

Ω

)

(Approx.)

2

1

90

3

4

6

Revision: 2011 October

2012 JUKE

B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR

HAC-65

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

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A

B

HAC

N

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B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR

DTC Logic

INFOID:0000000007577621

DTC DETECTION LOGIC 

NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

45, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. 

HAC-46,

"DTC Logic"

.

• If mode door motors DTC (B27A6 – B27A9) are detected, there is probably a disconnected connector or an

open circuit in mode door motor drive power supply harness.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-65, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000007577622

1.

CHECK MODE DOOR MOTOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect mode door motor connector.

3.

Turn ignition switch ON.

4.

Check voltage between mode door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector between mode door motor and fuse.

2.

CHECK MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

Check continuity between mode door motor harness connector and A/C auto amp. harness connector.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27A6

MODE DOOR MOTOR

Short or open circuit of mode door motor drive 
signal terminal 1.

• Mode door motor
• A/C auto amp.
• Harness or connectors

(The motor circuit is open or short-
ed.)

B27A7

Short or open circuit of mode door motor drive 
signal terminal 2.

B27A8

Short or open circuit of mode door motor drive 
signal terminal 3.

B27A9

Short or open circuit of mode door motor drive 
signal terminal 4.

+

−

Voltage

Mode door motor

Connector

Terminal

M342

5

Ground

Battery voltage

Revision: 2011 October

2012 JUKE