Nissan Pathfinder (2009 year). Instruction - part 455

AIR MIX DOOR MOTOR

HAC-35

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

• Air mix door motor does not operate.

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (DRIVER)

1.

CHECK A/C AUTO AMP. FOR POWER AND GROUND 

1.

Turn ignition switch ON.

2.

Rotate temperature control dial (driver) to 32

°

C (90

°

F).

3.

Check voltage between A/C auto amp. harness connector M49
terminal 17 and terminal 18 while rotating temperature control
dial (driver) to 18

°

C (60

°

F).

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK AIR MIX DOOR MOTOR (DRIVER) CIRCUITS FOR SHORT TO GROUND 

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M49 terminal 17, 18 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

3.

CHECK A/C AUTO AMP. FOR POWER AND GROUND 

1.

Turn ignition switch ON.

2.

Rotate temperature control dial (driver) to 32

°

C (90

°

F).

3.

Check voltage between A/C auto amp. harness connector M49
terminal 17 and terminal 18 while rotating temperature control
dial (driver) to 18

°

C (60

°

F).

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and Installation"

.

4.

CHECK AIR MIX DOOR MOTOR (DRIVER) CIRCUITS FOR OPEN

Connector

Terminals

Condition 

Voltage 

(Approx.)

(+) (-)

A/C auto amp.: 

M49

17 18

Rotate temp 

control dial

Battery 
voltage

AWIIA0112ZZ

17 - Ground

: Continuity should not exist.

18 - Ground

: Continuity should not exist.

AWIIA0114ZZ

Connector

Terminals

Condition 

Voltage 

(Approx.)

(+) (-)

A/C auto amp.: 

M49

18 17

Rotate temp 

control dial

Battery 
voltage

AWIIA0115ZZ

2009 Pathfinder

HAC-36

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M49 terminal 17 and terminal 18.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK AIR MIX DOOR MOTOR (DRIVER) CIRCUITS FOR OPEN 

1.

Disconnect the air mix door motor (driver) harness connector.

2.

Check continuity between A/C auto amp. harness connector
M49 (A) terminal 17, 18 and the air mix door motor (driver) har-
ness connector M147 (B) terminal 5, 6.

Is the inspection result normal?

YES

>> Replace air mix door motor (driver). Refer to 

VTL-30,

"Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

6.

CHECK A/C AUTO AMP. FOR PBR POWER AND GROUND

1.

Reconnect A/C auto amp. harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between A/C auto amp. harness connector M50
(A) terminal 28 and M49 (B) terminal 3.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M50 terminal 28 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

8.

CHECK PBR REFERENCE VOLTAGE AND GROUND CIRCUITS

Continuity should exist.

AWIIA0116ZZ

17 - 6

: Continuity should exist.

18 - 5

: Continuity should exist.

AWIIA0228ZZ

Connector

Terminals

Voltage (Ap-

prox.)

(+)

(-)

A/C auto amp.: M50, M49

28 

3

5V

AWIIA0118ZZ

Continuity should not exist.

AWIIA0119ZZ

2009 Pathfinder

AIR MIX DOOR MOTOR

HAC-37

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M50 (A) terminal 28 and M49 (B) terminal 3.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR OPEN

1.

Disconnect the air mix door motor (driver) harness connector.

2.

Check continuity between air mix door motor (driver) harness
connector M147 (B) terminal 3, 1 and A/C auto amp. harness
connector M49 (C) terminal 3 and M50 (A) terminal 28.

Is the inspection result normal?

YES

>> Replace air mix door motor (driver). Refer to 

VTL-30,

"Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

10.

CHECK PBR FEEDBACK VOLTAGE

1.

Reconnect the A/C auto amp. harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between A/C auto amp. harness connector M49
terminal 6 and ground while rotating temperature control dial
from 32

°

C (90

°

F) to 18

°

C (60

°

F).

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 11.

11.

CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT TO GROUND

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M49 terminal 6 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

12.

CHECK PBR FEEDBACK CIRCUIT FOR OPEN

Continuity should exist.

AWIIA0120ZZ

28 - 1

: Continuity should exist.

3 - 3

: Continuity should exist.

AWIIA0368ZZ

 Voltage

: Approx. .5V - 4.5V

AWIIA0122ZZ

Continuity should not exist.

AWIIA0123ZZ

2009 Pathfinder

HAC-38

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (driver) harness connector
and A/C auto amp. harness connector.

3.

Check continuity between air mix door motor (driver) harness
connector M147 (B) terminal 2 and A/C auto amp. harness con-
nector M49 (A) terminal 6.

Is the inspection result normal?

YES

>> Replace air mix door motor (driver). Refer to 

VTL-30,

"Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

Air Mix Door Motor (Passenger) Diagnosis Procedure

INFOID:0000000003935893

SYMPTOM:

• Discharge air temperature does not change.
• Air mix door motor does not operate.

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (PASSENGER)

1.

CHECK A/C AUTO AMP. FOR POWER AND GROUND 

1.

Turn ignition switch ON.

2.

Rotate temperature control dial (passenger) to 32

°

C (90

°

F).

3.

Check voltage between A/C auto amp. harness connector M49
terminal 14 and terminal 2 while rotating temperature control dial
(passenger) to 18

°

C (60

°

F).

Is the inspection result normal?

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

CHECK AIR MIX DOOR MOTOR (PASSENGER) CIRCUITS FOR SHORT TO GROUND 

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M49 terminal 14, 2 and ground.

Is the inspection result normal?

YES 

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

3.

CHECK A/C AUTO AMP. FOR POWER AND GROUND 

Continuity should exist.

AWIIA0230ZZ

Connector

Terminals

Condition 

Voltage 

(Approx.)

(+) (-)

A/C auto amp.: 

M49

2 14

Rotate temp 

control dial

Battery 
voltage

AWIIA0125ZZ

14 - Ground

: Continuity should not exist.

2 - Ground

: Continuity should not exist.

AWIIA0126ZZ

2009 Pathfinder

AIR MIX DOOR MOTOR

HAC-39

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1.

Turn ignition switch ON.

2.

Rotate temperature control dial (passenger) to 18

°

C (60

°

F).

3.

Check voltage between A/C auto amp. harness connector M49
terminal 14 and terminal 2 while rotating temperature control dial
(passenger) to 32

°

C (90

°

F).

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and Installation"

.

4.

CHECK AIR MIX DOOR MOTOR (PASSENGER) CIRCUITS FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M50 terminal 14 and terminal 2.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK AIR MIX DOOR MOTOR (PASSENGER) CIRCUITS FOR OPEN 

1.

Disconnect the air mix door motor (passenger) harness connec-
tor.

2.

Check continuity between A/C auto amp. harness connector
M49 (A) terminal 14, 2 and the air mix door motor (passenger)
harness connector M143 (B) terminal 5, 6.

Is the inspection result normal?

YES

>> Replace air mix door motor (passenger). Refer to 

VTL-

30, "Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

6.

CHECK A/C AUTO AMP. FOR PBR POWER AND GROUND

1.

Reconnect A/C auto amp. harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between A/C auto amp. harness connector M50
(A) terminal 28 and M49 (B) terminal 3.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND

Connector

Terminals

Condition 

Voltage 

(Approx.)

(+) (-)

A/C auto amp.: 

M49

14 2

Rotate temp 

control dial

Battery 
voltage

AWIIA0127ZZ

Continuity should exist.

AWIIA0128ZZ

14 - 6

: Continuity should exist.

2 - 5

: Continuity should exist.

AWIIA0231ZZ

Connector

Terminals

Voltage (Ap-

prox.)

(+)

(-)

A/C auto amp.: M49

28 

3

5V

AWIIA0099ZZ

2009 Pathfinder

HAC-40

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M49 terminal 29 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

8.

CHECK PBR REFERENCE VOLTAGE AND GROUND CIRCUITS

1.

Turn ignition switch OFF.

2.

Disconnect the A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M50 (A) terminal 28 and M49 (B) terminal 3.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR OPEN

1.

Disconnect the air mix door motor (passenger) harness connec-
tor.

2.

Check continuity between air mix door motor (passenger) har-
ness connector M143 (B) terminal 3, 1 and A/C auto amp. har-
ness connector M49 (C) terminal 3 and M50 (A) terminal 28.

Is the inspection result normal?

YES

>> Replace air mix door motor (passenger). Refer to 

VTL-

30, "Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

10.

CHECK PBR FEEDBACK VOLTAGE

1.

Reconnect the A/C auto amp. harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between A/C auto amp. harness connector M50
terminal 29 and ground while rotating temperature control dial
(passenger) from 32

°

C (90

°

F) to 18

°

C (60

°

F).

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 11.

11.

CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT TO GROUND

Continuity should not exist.

AWIIA0241ZZ

Continuity should exist.

AWIIA0101ZZ

28 - 1

: Continuity should exist.

3 - 3

: Continuity should exist.

AWIIA0368ZZ

 Voltage

: Approx. .5V - 4.5V

AWIIA0131ZZ

2009 Pathfinder

AIR MIX DOOR MOTOR

HAC-41

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. harness connector.

3.

Check continuity between A/C auto amp. harness connector
M50 terminal 29 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

12.

CHECK PBR FEEDBACK CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (passenger) harness connec-
tor and A/C auto amp. harness connector.

3.

Check continuity between air mix door motor (passenger) har-
ness connector M143 (B) terminal 2 and A/C auto amp. harness
connector M50 (A) terminal 29.

Is the inspection result normal?

YES

>> Replace air mix door motor (passenger). Refer to 

VTL-

30, "Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

Continuity should not exist.

AWIIA0132ZZ

Continuity should exist.

AWIIA0233ZZ

2009 Pathfinder

HAC-42

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE DOOR MOTOR

INTAKE DOOR MOTOR

System Description

INFOID:0000000003935894

SYSTEM DESCRIPTION

SYMTOM:

• Intake door motor does not operate normally.
• Intake door does not change.

SYSTEM DESCRIPTION

Component Parts

Intake door control system components are:

• A/C auto amp.
• A/C and AV switch assembly
• Intake door motor (PRB built into the intake door motor)
• In-vehicle sensor
• Ambient sensor
• Optical sensor
• Intake sensor

System Operation

The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and
recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the
opposite direction, again allowing fresh air into the cabin.
In the AUTO mode, the A/C auto amp. determines the intake door position based on the ambient temperature,
the intake air temperature and the in-vehicle temperature. When the DEF, D/F, FLOOR or OFF switches are
pushed, the A/C auto amp. sets the intake door at the fresh position.

Intake Door Control Specification

AWIIA0144GB

AWIIA0145GB

2009 Pathfinder