Nissan Pathfinder. Manual - part 710

B263D, B263E, B263F INTAKE DOOR MOTOR

HAC-101

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

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HAC

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B263D, B263E, B263F INTAKE DOOR MOTOR

DTC Logic

INFOID:0000000009176839

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON.

2. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC. 

3. Check if any DTC No. is displayed in the self-diagnosis results. 
Is DTC detected?

YES

>> Refer to 

HAC-101, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009176840

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK INTAKE DOOR MOTOR COMMUNICATION SIGNAL

1. Turn ignition switch ON.

2. Check output waveform between intake door motor harness connector and ground with the oscilloscope. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK INSTALLATION OF INTAKE DOOR MOTOR

Check intake door motor is properly installed. Refer to 

HAC-163, "Exploded View"

.

Is the inspection result normal?

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B263D

FRE DOOR FAIL

When the malfunctioning intake door 
position is detected at FRE position

• Intake door motor

(PBR internal circuit is open or short-
ed)

• A/C auto amp.
• Harness and connector

(LIN communication line is open or 
shorted)

B263E

20P FRE DOOR FAIL

When the malfunctioning intake door 
position is detected at 20% FRE posi-
tion

B263F

REC DOOR FAIL

When the malfunctioning intake door 
position is detected at REC position

+

−

Output waveform

Intake door motor

Connector

Terminal

M128

2

Ground

SJIA1453J

HAC-102

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B263D, B263E, B263F INTAKE DOOR MOTOR

YES

>> Replace intake door motor. Refer to 

HAC-165, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

NO

>> Repair or replace malfunctioning part.

3.

CHECK INTAKE DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect intake door motor and 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-157, "Removal and Installation"

.

NO

>> Repair harness or connector.

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M128

2

M50

16

Yes

B2799, B279A AIR MIX DOOR MOTOR (REAR)

HAC-103

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

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J

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A

B

HAC

N

O

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B2799, B279A AIR MIX DOOR MOTOR (REAR)

DTC Logic

INFOID:0000000009176841

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON.

2. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC. 

3. Check if any DTC No. is displayed in the self-diagnosis results. 
Is DTC detected?

YES

>> Refer to 

HAC-103, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009176842

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK AIR MIX DOOR MOTOR (REAR) COMMUNICATION SIGNAL

1. Turn ignition switch ON.

2. Check output waveform between air mix door motor (rear) harness connector and ground with the oscillo-

scope. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK INSTALLATION OF AIR MIX DOOR MOTOR (REAR)

Check air mix door motor (rear) is properly installed. Refer to 

HAC-163, "Exploded View"

.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2664

REAR AIR MIX DOOR MOT

Air mix door motor (rear) PBR position 
95% or more

• Air mix door motor (rear)

(PBR internal circuit is open or short-
ed)

• Air mix door motor (rear) installation 

condition

• A/C auto amp.
• Harness and connector

(LIN communication line is open or 
shorted)

B2665

Air mix door motor (rear) PBR position 
5% or less

+

−

Output waveform

Air mix door motor (rear)

Connector

Terminal

M132

2

Ground

SJIA1453J

HAC-104

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2799, B279A AIR MIX DOOR MOTOR (REAR)

Is the inspection result normal?

YES

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

HAC-165, "AIR MIX DOOR MOTOR : Removal and

Installation - Air Mix Door Motor (Rear)"

.

NO

>> Repair or replace malfunctioning part.

3.

CHECK AIR MIX DOOR MOTOR (REAR) COMMUNICATION SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect air mix door motor (rear) and A/C auto amp. connector. 

3. Check continuity between air mix door motor (rear) harness connector and A/C auto amp. harness con-

nector. 

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-157, "Removal and Installation"

.

NO

>> Repair harness or connector.

Air mix door motor (rear)

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M132

2

M50

16

Yes