Nissan Pathfinder. Manual — part 709

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

HAC-97

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

DTC Logic

INFOID:0000000009176835

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-97, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009176836

Regarding Wiring Diagram information, refer to

HAC-49, "Wiring Diagram"

.

1.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) COMMUNICATION SIGNAL

1. Turn ignition switch ON.

2. Check output waveform between front air mix door motor RH harness connector and ground with the

oscilloscope.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK INSTALLATION OF AIR MIX DOOR MOTOR (PASSENGER SIDE)

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

HAC-163, "Exploded View"

.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2634

PASS AIR MIX DOOR MOT

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

• Air mix door motor (passenger side)

(PBR internal circuit is open or short-
ed)

• Air mix door motor (passenger side) in-

stallation condition

• A/C auto amp.
• Harness and connector

(LIN communication line is open or
shorted)

B2635

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

+

−

Output waveform

Air mix door motor (passenger side)

Connector

Terminal

M131

2

Ground

SJIA1453J

HAC-98

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

Is the inspection result normal?

YES

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

HAC-165, "AIR MIX DOOR MOTOR :

Removal and Installation - Air Mix Door Motor (Passenger Side)"

.

NO

>> Repair or replace malfunctioning part.

3.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) COMMUNICATION SIGNAL CIRCUIT

1. Turn ignition switch OFF.

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

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

ness connector.

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 (passenger side)

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M131

2

M50

16

Yes

B2636, B2637, B2638, B2639, B2654 MODE DOOR MOTOR (FRONT)

HAC-99

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B2636, B2637, B2638, B2639, B2654 MODE DOOR MOTOR (FRONT)

DTC Logic

INFOID:0000000009176837

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-99, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009176838

Regarding Wiring Diagram information, refer to

HAC-49, "Wiring Diagram"

.

1.

CHECK MODE DOOR MOTOR (FRONT) COMMUNICATION SIGNAL

1. Turn ignition switch ON.

2. Check output waveform between mode door motor (front) harness connector and ground with the oscillo-

scope.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2636

DR VENT DOOR FAIL

When the malfunctioning door position
is detected at VENT position

• Mode door motor (front)

(PBR internal circuit is open or short-
ed)

• Mode door motor (front) control link-

age installation condition

• A/C auto amp.
• Harness and connector

(LIN communication line is open or
shorted)

B2637

DR B/L DOOR FAIL

When the malfunctioning door position
is detected at B/L position

B2638

DR D/F1 DOOR FAIL

When the malfunctioning door position
is detected at FOOT position

B2639

DR DEF DOOR FAIL

When the malfunctioning door position
is detected at DEF position

B2654

D/F2 VENT DOOR FAIL

When the malfunctioning door position
is detected at D/F position

+

−

Output waveform

Mode door motor (front)

Connector

Terminal

M129

2

Ground

SJIA1453J

HAC-100

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2636, B2637, B2638, B2639, B2654 MODE DOOR MOTOR (FRONT)

2.

CHECK INSTALLATION OF MODE DOOR MOTOR (FRONT)

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

HAC-163, "Exploded View"

.

Is the inspection result normal?

YES

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

HAC-164, "MODE DOOR MOTOR : Removal and

Installation - Mode Door Motor (Front)"

.

NO

>> Repair or replace malfunctioning part.

3.

CHECK MODE DOOR MOTOR (FRONT) COMMUNICATION SIGNAL CIRCUIT

1. Turn ignition switch OFF.

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

3. Check continuity between mode door motor (front) 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.

Mode door motor (front)

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M129

2

M50

16

Yes