Nissan Pathfinder. Manual — part 711

B279B, B279C MODE DOOR MOTOR (REAR)

HAC-105

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B279B, B279C MODE DOOR MOTOR (REAR)

DTC Logic

INFOID:0000000009176843

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-105, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009176844

Regarding Wiring Diagram information, refer to

HAC-49, "Wiring Diagram"

.

1.

CHECK MODE DOOR MOTOR (REAR) COMMUNICATION SIGNAL

1. Turn ignition switch ON.

2. Check output waveform between mode 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 MODE DOOR MOTOR (REAR)

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

HAC-163, "Exploded View"

.

Is the inspection result normal?

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B279B

REAR MODE DOOR MOT

When the malfunctioning door position
is detected at VENT position

• Mode door motor (rear)

(PBR internal circuit is open or short-
ed)

• A/C auto amp.
• Harness and connector

(LIN communication line is open or
shorted)

B279C

When the malfunctioning door position
is detected at FOOT position

+

−

Output waveform

Mode door motor (rear)

Connector

Terminal

M13

2

Ground

SJIA1453J

HAC-106

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B279B, B279C MODE DOOR MOTOR (REAR)

YES

>> Replace mode door motor (rear). Refer to

HAC-164, "MODE DOOR MOTOR : Removal and

Installation - Mode Door Motor (Rear)"

.

NO

>> Repair or replace malfunctioning part.

3.

CHECK MODE DOOR MOTOR (REAR) COMMUNICATION SIGNAL CIRCUIT

1. Turn ignition switch OFF.

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

3. Check continuity between mode door motor (rear) harness connector and A/C auto amp. harness connec-

tor.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to

HAC-157, "Removal and Installation"

.

NO

>> Repair harness or connector.

Mode door motor (rear)

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M13

2

M50

16

Yes

B279D, B279E REAR SHUT-OFF DOOR MOTOR

HAC-107

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B279D, B279E REAR SHUT-OFF DOOR MOTOR

DTC Logic

INFOID:0000000009176845

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-107, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009176846

Regarding Wiring Diagram information, refer to

HAC-49, "Wiring Diagram"

.

1.

CHECK REAR SHUT-OFF DOOR MOTOR COMMUNICATION SIGNAL

1. Turn ignition switch ON.

2. Check output waveform between rear shut-off door motor 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 REAR SHUT-OFF DOOR MOTOR

Check rear shut-off 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

B279D

REAR SHUT DOOR MOT

When the malfunctioning door position
is detected at open position

• Rear shut door motor

(PBR internal circuit is open or short-
ed)

• A/C auto amp.
• Harness and connector

(LIN communication line is open or
shorted)

B279E

When the malfunctioning door position
is detected at closed position

+

−

Output waveform

Mode door motor (rear)

Connector

Terminal

M12

2

Ground

SJIA1453J

HAC-108

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B279D, B279E REAR SHUT-OFF DOOR MOTOR

YES

>> Replace shut-off door motor. Refer to

HAC-165, "REAR SHUT-OFF DOOR MOTOR : Removal

and Installation"

.

NO

>> Repair or replace malfunctioning part.

3.

CHECK MODE DOOR MOTOR (REAR) COMMUNICATION SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect rear shut-off door motor and A/C auto amp. connector.

3. Check continuity between rear shut-off door motor 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.

Rear shut-off door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M12

2

M50

16

Yes