Nissan Murano. Manual - part 855

HAC-194

< DTC/CIRCUIT DIAGNOSIS >

[WITH 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:0000000009722192

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-195

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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

HAC-196

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

BLOWER MOTOR

BLOWER MOTOR

Description

INFOID:0000000009722193

COMPONENT DESCRIPTION

Brush-less Motor

The blower motor utilizes a brush-less motor with a rotating magnet.
Quietness is improved over previous motors where the brush was
the point of contact and the coil rotated.

Blower Motor Circuit

Component Function Check

INFOID:0000000009722194

1.

CHECK OPERATION

1.

Warm up the engine.

2.

Operate the fan control dial. Check that the fan speed and indicator are switched for all fan speeds. 

Does it operate normally?

YES

>> INSPECTION END

NO

>> Perform trouble diagnosis for the blower motor. Refer to 

HAC-196, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009722195

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-

170, "DTC Logic"

 or 

HAC-171, "DTC Logic"

. 

Is any DTC No. displayed?

YES

>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to 

HAC-230, "DTC

Index"

. 

NO

>> GO TO 2.

2.

CHECK WITH ACTIVE TEST OF CONSULT

1.

Using CONSULT, perform “HVAC TEST” “ACTIVE TEST” of HVAC to check each output device. Refer to

HAC-166, "CONSULT Function"

.

NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated. 

ZHA152H

JSIIA0999ZZ

BLOWER MOTOR

HAC-197

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

2.

Check that the blower motor control signal changes according to each indicator signal. 

NOTE:

Perform the inspection of each output device after starting the engine because the compressor is operated. 

Does it operate normally?

YES

>> INSPECTION END

NO

>> GO TO 3.

3.

CHECK POWER SUPPLY FOR BLOWER MOTOR

1.

Disconnect blower motor connector.

2.

Turn ignition switch ON.

3.

Check voltage between blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 7.

4.

CHECK BLOWER MOTOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK BLOWER MOTOR CIRCUIT CONTINUITY

1.

Disconnect A/C auto amp. connector.

2.

Check continuity between blower motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 6.

Test item

MODE 1

MODE 2

MODE 3

MODE 4

MODE 5

MODE 6

MODE 7

Mode door position

VENT1

VENT2

B/L1

B/L2

FOOT

D/F

DEF

Intake door position

REC

REC

20%FRE

20%FRE

FRE

FRE

FRE

Air mix door position 
(driver & passenger 
side)

FULL COLD

FULL HOT

FULL COLD

FULL HOT

FULL HOT

FULL HOT

FULL HOT

Blower motor duty ratio

35%

35%

61%

61%

81%

81%

35%

Compressor (Magnet 
clutch)

ON

ON

ON

ON

OFF

OFF

ON

Upper ventilator door

OPEN

SHUT

OPEN

SHUT

SHUT

SHUT

SHUT

(+)

(

−

)

Voltage

Blower motor

—

Connector

Terminal

M98

1

Ground

Battery voltage

Blower motor

—

Continuity

Connector

Terminal

M98

3

Ground

Existed

Blower motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M98

2

M50

32

Existed