Nissan Murano. Manual - part 823

HAC-66

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B263D, B263E, B263F INTAKE DOOR MOTOR

Diagnosis Procedure

INFOID:0000000009722084

1.

CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR

Check voltage between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK SIGNAL FOR INTAKE DOOR MOTOR

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTAKE DOOR MOTOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect intake door motor connector.

3.

Check continuity between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> Replace intake door motor.

NO

>> Repair harness or connector.

(+)

(

−

)

Voltage

Intake door motor

—

Connector

Terminal

M304

1

Ground

Battery voltage

(+)

(

−

)

Voltage

Intake door motor

—

Connector

Terminal

M304

3

Ground

SJIA1453J

Intake door motor

—

Continuity

Connector

Terminal

M304

2

Ground

Existed

B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR

HAC-67

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR

Description

INFOID:0000000009722085

COMPONENT DESCRIPTION

Upper Ventilator Door Motor

• The upper ventilator door motor (1) are attached to the heater &

cooling unit assembly.

• Upper ventilator door motor operates by UPPER VENT switch ON/

OFF when the DEF switch is OFF. 

• Motor rotation is conveyed to a link which activates the upper ven-

tilator door.

DTC Logic

INFOID:0000000009722086

DTC DETECTION LOGIC

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

HAC-

44, "DTC Logic"

 or 

HAC-45, "DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT

1.

Using CONSULT 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-

44, "DTC Logic"

 or 

HAC-45, "DTC Logic"

. 

Is DTC No.“B2661”, “B2662” or “B2663” displayed?

YES

>> Perform trouble diagnosis for the upper ventilator door motor. Refer to 

HAC-68, "Diagnosis Proce-

dure"

. 

NO

>> GO TO 2.

2.

FUNCTION INSPECTION

1.

Press the UPPER VENT switch. 

2.

The UPPER VENT switch indicator is turned ON. 

:

Vehicle front

JPIIA0514ZZ

DTC

Items

 (CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

B2661

UPPER VENT DOOR MOT

When the malfunctioning upper ventilator 
door position is detected at open position.

• Upper ventilator door motor (PBR 

internal circuit is open or shorted)

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

munication line is open or shorted)

B2662

When the malfunctioning upper ventilator 
door position is detected at middle posi-
tion.

B2663

When the malfunctioning upper ventilator 
door position is detected at shut position.

HAC-68

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR

3.

Check that the air blown from UPPER VENT does not greatly deviate from the air mix ratio. 

4.

Press the UPPER VENT switch again. 

5.

The UPPER VENT switch indicator is turned OFF. 

6.

The air blown from UPPER VENT stops. 

Does it operate normally?

YES

>> INSPECTION END

NO

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

Diagnosis Procedure

INFOID:0000000009722087

1.

CHECK POWER SUPPLY FOR UPPER VENTILATOR DOOR MOTOR

Check voltage between upper ventilator door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK SIGNAL FOR UPPER VENTILATOR DOOR MOTOR

Confirm A/C LAN signal between upper ventilator door motor harness connector and ground using an oscillo-
scope.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

JPIIA0509GB

(+)

(

−

)

Voltage

Upper ventilator door motor

—

Connector

Terminal

M308

1

Ground

Battery voltage

(+)

(

−

)

Voltage

Upper ventilator door motor

—

Connector

Terminal

M308

3

Ground

SJIA1453J

B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR

HAC-69

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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3.

CHECK UPPER VENTILATOR DOOR MOTOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect upper ventilator door motor connector.

3.

Check continuity between upper ventilator door motor harness connector and ground.

Is the inspection result normal?

YES

>> Replace upper ventilator door motor.

NO

>> Repair harness or connector.

Upper ventilator door motor

—

Continuity

Connector

Terminal

M308

2

Ground

Existed