Nissan Murano Z51. Manual - part 851

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

HAC-59

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

Description

INFOID:0000000005514621

COMPONENT DESCRIPTION

Air Mix Door Motor (Passenger Side)

• The air mix door motor (passenger side) (1) are attached to the

heater & cooling unit assembly.

• It rotates so that the air mix door is opened or closed to a position

set by the A/C auto amp.

• Motor rotation is then conveyed through a shaft and the air mix

door position feedback is then sent to the A/C auto amp. by PBR
built-in air mix door motor.

DTC Logic

INFOID:0000000005514622

DTC DETECTION LOGIC

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to 

HAC-

43, "DTC Logic"

 or 

HAC-44, "DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

1.

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

2.

Check if any DTC No. is displayed in the self-diagnosis results. 

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to 

HAC-

43, "DTC Logic"

 or 

HAC-44, "DTC Logic"

. 

Is DTC No.“B2634” or “B2635” displayed?

YES

>> Perform trouble diagnosis for the air mix door motor (passenger side). Refer to 

HAC-60, "Diagno-

sis Procedure"

. 

NO

>> GO TO 2.

2.

FUNCTION INSPECTION

1.

Press temperature control “UP” switch (passenger side) until 32

°

C (90

°

F) is displayed.

2.

Check for warm air at discharge air outlets.

3.

Operate the compressor. 

4.

Press temperature control “DOWN” switch (passenger side) until 18

°

C (60

°

F) is displayed.

5.

Check for cool air at air discharge outlets.

Does it operate normally?

YES

>> INSPECTION END

NO

>> Check air mix door motor (passenger side) installation, and repair or replace the malfunctioning

parts. 

:

Vehicle front

JPIIA0526ZZ

DTC

Items

 (CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2634

PASS AIRMIX ACTR SHORT

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

• Air mix door motor (PBR internal 

circuit is open or shorted)

• A/C auto amp.
• Harness and connector

(LAN communication line is open 
or shorted)

B2635

PASS AIRMIX ACTR OPEN

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

HAC-60

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

Diagnosis Procedure

INFOID:0000000005514623

1.

CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

Check voltage between air mix door motor (passenger side) harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the harnesses or connectors.

2.

CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

Check the output waveform (LAN signal) between air mix door motor (passenger side) harness connector and
ground using an oscilloscope. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect air mix door motor (passenger side) connector.

3.

Check continuity between air mix door motor (passenger side) harness connector and ground.

Is the inspection result normal?

YES

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

NO

>> Repair harness or connector.

(+)

(

−

)

Voltage

Air mix door motor (passenger side)

—

Connector

Terminal

M307

1

Ground

Battery voltage

(+)

(

−

)

Voltage

Air mix door motor (passenger side)

—

Connector

Terminal

M307

3

Ground

SJIA1453J

Air mix door motor (passenger side)

—

Continuity

Connector

Terminal

M307

2

Ground

Existed

B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR

HAC-61

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR

Description

INFOID:0000000005514624

COMPONENT DESCRIPTION

Mode Door Motor

• The mode door motor (1) are attached to the heater & cooling unit

assembly.

• It rotates so that air is discharged from the outlet set by the A/C

auto amp. Motor rotation is conveyed to a link which activates the
mode door.

DTC Logic

INFOID:0000000005514625

DTC DETECTION LOGIC

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to 

HAC-

43, "DTC Logic"

 or 

HAC-44, "DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

1.

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

2.

Check if any DTC No. is displayed in the self-diagnosis results. 

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to 

HAC-

43, "DTC Logic"

 or 

HAC-44, "DTC Logic"

. 

Is DTC No.“ B2636 ”, “ B2637 ”, “B2638 ”, “B2639 ”, “B2654 ” or “B2655 ” displayed?

YES

>> Perform trouble diagnosis for the mode door motor. Refer to 

HAC-62, "Diagnosis Procedure"

. 

NO

>> GO TO 2.

2.

FUNCTION INSPECTION

1.

Press MODE switch and DEF switch.

2.

Each position indicator should change shape.

:

Vehicle front

JPIIA0513ZZ

DTC

Items

 (CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2636

DR VENT DOOR FAIL

When the malfunctioning door position is 
detected at VENT position

• Mode door motor (PBR internal 

circuit is open or shorted)

• A/C auto amp.
• Harness and connector (LAN 

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 DOOR FAIL

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

B2655

B/L2 DOOR FAIL

When the malfunctioning door position is 
detected at B/L2 position

HAC-62

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR

3.

Confirm that air discharge comes out according to the air distribution table at below. Refer to 

HAC-15,

"System Description"

.

NOTE:
Confirm that the compressor clutch is engaged (Sound or visual inspection) and intake door position is at FRE
when DEF ( 

 ) or D/F ( 

 ) is selected.

Does it operate normally?

YES

>> INSPECTION END

NO

>> Check mode door motor installation, and repair or replace the malfunctioning parts.

Diagnosis Procedure

INFOID:0000000005514626

1.

CHECK POWER SUPPLY FOR MODE DOOR MOTOR

Check voltage between mode door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK SIGNAL FOR MODE DOOR MOTOR

Confirm A/C LAN signal between mode door motor harness connector and ground using an oscilloscope.

JPIIA0509GB

JPIIA0510GB

(+)

(

−

)

Voltage

Mode door motor

—

Connector

Terminal

M310

1

Ground

Battery voltage