Juke F15 (2012 year). Service Repair Manual - part 238

B2630, B2631 SUNLOAD SENSOR

HAC-63

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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-91, "Removal and Installation"

.

NO

>> Replace sunload sensor. Refer to 

HAC-94, "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-91, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000006545833

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

HAC-64

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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-94, "Removal and Installation"

.

JPIIA1659GB

B27A0, B27A1 INTAKE DOOR MOTOR

HAC-65

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

C

D

E

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G

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J

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A

B

HAC

N

O

P

B27A0, B27A1 INTAKE DOOR MOTOR 

DTC Logic

INFOID:0000000006626930

DTC DETECTION LOGIC 

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

HAC-

51, "DTC Logic"

.

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

HAC-52,

"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-III

1.

Start engine.

2.

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

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-65, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006626931

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-III 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

HAC-66

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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-67, "Component Inspection (PBR)"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-91, "Removal and Installation"

.

NO

>> Replace intake door motor. Refer to 

HAC-99, "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-91, "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

B27A0, B27A1 INTAKE DOOR MOTOR

HAC-67

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

C

D

E

F

G

H

J

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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-67, "Component Inspection (Motor)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace intake door motor. Refer to 

HAC-99, "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-98, "Exploded View"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-91, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

Component Inspection (PBR)

INFOID:0000000006626932

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-99, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

Component Inspection (Motor)

INFOID:0000000006626933

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

HAC-68

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

B27A0, B27A1 INTAKE DOOR MOTOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace intake door motor. Refer to 

HAC-99, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

Terminal

Operation direction

+

−

5

6

REC

6

5

FRE

B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR

HAC-69

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

C

D

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G

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A

B

HAC

N

O

P

B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR

DTC Logic

INFOID:0000000006627111

DTC DETECTION LOGIC 

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

HAC-

51, "DTC Logic"

.

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

HAC-52,

"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-III

1.

Turn ignition switch ON.

2.

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

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-69, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006545834

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-III 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

HAC-70

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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-70, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-91, "Removal and Installation"

.

NO

>> Replace air mix door motor. Refer to 

HAC-100, "AIR MIX DOOR MOTOR : Removal and Installa-

tion"

.

Component Inspection

INFOID:0000000006627112

1.

CHECK AIR MIX DOOR MOTOR

1.

Remove air mix door motor. Refer to 

HAC-100, "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-100, "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

B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR

HAC-71

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

C

D

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F

G

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A

B

HAC

N

O

P

B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR

DTC Logic

INFOID:0000000006627113

DTC DETECTION LOGIC 

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

HAC-

51, "DTC Logic"

.

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

HAC-52,

"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-III

1.

Turn ignition switch ON.

2.

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

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-71, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006545835

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-III 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

HAC-72

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT

Check continuity between mode 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 MODE DOOR MOTOR

Check mode door motor. Refer to 

HAC-72, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-91, "Removal and Installation"

.

NO

>> Replace mode door motor. Refer to 

HAC-100, "MODE DOOR MOTOR : Removal and Installa-

tion"

.

Component Inspection

INFOID:0000000006627114

1.

CHECK MODE DOOR MOTOR

1.

Remove mode door motor. Refer to 

HAC-100, "MODE DOOR MOTOR : Removal and Installation"

.

2.

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace mode door motor. Refer to 

HAC-100, "MODE DOOR MOTOR : Removal and Installa-

tion"

.

Mode door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M342

4

M50

37

Existed

3

38

2

39

1

40

Mode door motor

—

Continuity

Connector

Terminal

M342

4

Ground

Not existed

3

2

1

Terminal

Resistance (

Ω

)

(Approx.)

5

1

90

2

3

4

POWER SUPPLY AND GROUND CIRCUIT

HAC-73

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

C

D

E

F

G

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A

B

HAC

N

O

P

POWER SUPPLY AND GROUND CIRCUIT

A/C AUTO AMP.

A/C AUTO AMP. : Diagnosis Procedure

INFOID:0000000006545823

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).
NOTE:
Refer to 

PG-23, "Fuse and Fusible Link 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

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 A/C auto amp. Refer to 

HAC-91, "Removal and Installation"

.

NO

>> Repair harness or connector.

5.

CHECK FUSE

Symptom

A

• Air conditioning system does not activate.
• Air conditioning system does cannot be controlled.
• Operation status of air conditioning system is not indicated on display.
NOTE:
Fail-safe does not activate.

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

11

Ground

Battery voltage

A/C auto amp.

—

Continuity

Connector

Terminal

M50

30

Ground

Existed

HAC-74

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

POWER SUPPLY AND GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check 10A fuse (No.7, located in fuse block (J/B)].
NOTE:
Refer to 

PG-22, "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 A/C auto amp. Refer to 

HAC-91, "Removal and Installation"

.

NO

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

+

−

Voltage

A/C auto amp.

Connector

Terminal

M50

12

Ground

Battery voltage

A/C ON SIGNAL

HAC-75

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

C

D

E

F

G

H

J

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M

A

B

HAC

N

O

P

A/C ON SIGNAL

Component Function Check

INFOID:0000000006545838

1.

CHECK A/C ON SIGNAL

With CONSULT-III

1.

Turn ignition switch ON.

2.

Operate blower motor.

3.

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

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-75, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006545839

1.

CHECK A/C ON SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

Turn ignition switch ON.

4.

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

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-91, "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 auto amp. harness connector and BCM harness connector.

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 auto amp.

Connector

Terminal

M50

15

Ground

JPMIA0012GB

A/C auto amp.

BCM

Continuity

Connector

Terminal

Connector

Terminal

M50

15

M65 (without Intelli-

gent Key)

M68 (with Intelligent 

Key)

27

Existed

HAC-76

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

A/C ON SIGNAL

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK A/C ON SIGNAL CIRCUIT FOR SHORT

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

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-93, "Removal and Installation"

 (with Intelligent Key) or 

BCS-161,

"Removal and Installation"

 (without Intelligent Key).

NO

>> Repair harness or connector.

A/C auto amp.

—

Continuity

Connector

Terminal

M50

15

Ground

Not existed

BLOWER FAN ON SIGNAL

HAC-77

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

BLOWER FAN ON SIGNAL

Component Function Check

INFOID:0000000006545840

1.

CHECK BLOWER FAN ON SIGNAL

With CONSULT-III

1.

Turn ignition switch ON.

2.

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

3.

Select “FAN ON SIG” in “DATA MONITOR” mode.

4.

Check blower fan ON signal when the fan control dial is operated.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

HAC-77, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006545841

1.

CHECK BLOWER FAN ON SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. harness connector.

3.

Turn ignition switch ON.

4.

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

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-91, "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 auto amp. harness connector and BCM harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

Monitor item

Condition

Status

FAN ON SIG

Blower motor

ON

On

OFF

OFF

+

−

Output waveform

A/C auto amp.

Connector

Terminal

M50

14

Ground

PKIB4960J

A/C auto amp.

BCM

Continuity

Connector

Terminal

Connector

Terminal

M50

14

M65 (without Intelli-

gent Key)

M68 (with Intelligent 

Key)

28

Existed

HAC-78

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

BLOWER FAN ON SIGNAL

NO

>> Repair harness or connector.

3.

CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR SHORT

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

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-93, "Removal and Installation"

 (with Intelligent Key) or 

BCS-161,

"Removal and Installation"

 (without Intelligent Key).

NO

>> Repair harness or connector.

A/C auto amp.

—

Continuity

Connector

Terminal

M50

14

Ground

Not existed