Nissan Murano Z51 (2008 year). Manual

U1010 CONTROL UNIT (CAN)

HAC-43

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000003412919

Initial diagnosis of A/C auto amp.

DTC Logic

INFOID:0000000003412920

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003412921

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

Is DTC No.“U1010” displayed?

YES

>> Replace A/C auto amp.

>> INSPECTION END

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

U1010

CONTROL UNIT (CAN)

When detecting error during the initial diag-
nosis of CAN controller of A/C auto amp.

A/C auto amp.

Revision: 2008 October

2009 Murano

HAC-44

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B257B, B257C AMBIENT SENSOR

B257B, B257C AMBIENT SENSOR

Description

INFOID:0000000003073073

COMPONENT DESCRIPTION

Ambient Sensor

• The ambient sensor (1) is installed to the front bumper (left back).
• It detects ambient temperature and converts it into a resistance

value which is then input into the A/C auto amp.

Ambient Sensor Circuit

AMBIENT TEMPERATURE INPUT PROCESS

The A/C auto amp. equips a processing circuit for the ambient sensor input. However, when the temperature
detected by the ambient sensor increases quickly, the processing circuit retards the A/C auto amp. function. It
only allows the A/C auto amp. to recognize an ambient temperature increase of 0.33

C (0.6

F) per 100 sec-

onds.
As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the ambient sensor increases. This is because the
heat from the engine compartment can radiate to the front bumper area, the location of the ambient sensor.

DTC Logic

INFOID:0000000003412932

DTC DETECTION LOGIC

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

HAC-

42, "DTC Logic"

HAC-43, "DTC Logic"

• If there is an open circuit in the ambient sensor, A/C auto amp. registers extreme cold [

−

C (

−

F)] and

adjusts the temperature control warmer.

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

JSIIA1532JP

JPIIA0612GB

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B257B

AMB TEMP SEN SHORT

Detected temperature at ambient sensor

−

C (

−

F) or less

• Ambient sensor
• A/C auto amp.
• Harness and connector

(Ambient sensor circuit is open,
or there is a short in the circuit)

B257C

AMB TEMP SEN OPEN

Detected temperature at ambient sensor
100

C (212

F) or more

Revision: 2008 October

2009 Murano

B257B, B257C AMBIENT SENSOR

HAC-45

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

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

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-

42, "DTC Logic"

HAC-43, "DTC Logic"

• If there is an open circuit in the ambient sensor, A/C auto amp. registers extreme cold [

−

C (

−

F)] and

adjusts the temperature control warmer.

Is DTC No.“B257B” or “B257C” displayed?

YES

>> Perform trouble diagnosis for the ambient sensor. Refer to

HAC-45, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003073075

CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND

Disconnect ambient sensor connector.

Turn ignition switch ON.

Check voltage between ambient sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK AMBIENT SENSOR

Check ambient sensor. Refer to

HAC-46, "Component Inspection"

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Replace ambient sensor.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.

Check continuity between ambient sensor harness connector and ground.

(+)

(

−

)

Voltage

Ambient sensor

—

Connector

Terminal

E337

Ground

Approx. 5 V

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E337

M50

Existed

Ambient sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

E337

M50

Existed

Revision: 2008 October

2009 Murano

HAC-46

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B257B, B257C AMBIENT SENSOR

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Repair harness or connector.

Component Inspection

INFOID:0000000003073076

CHECK AMBIENT SENSOR

Turn ignition switch OFF.

Disconnect ambient sensor connector. Refer to

VTL-25, "Exploded View"

Check resistance between ambient sensor terminals.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace ambient sensor.

Ambient sensor

—

Continuity

Connector

Terminal

E337

Ground

Not existed

Terminal

Condition

Resistance k

Ω

Temperature

C (

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32)

6.19

5 (41)

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

Revision: 2008 October

2009 Murano

B2578, B2579 IN-VEHICLE SENSOR

HAC-47

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

B2578, B2579 IN-VEHICLE SENSOR

Description

INFOID:0000000003073077

In-vehicle Sensor
• The in-vehicle sensor (1) is located on instrument driver lower

panel (2).

• It converts variations in compartment air temperature drawn from

the aspirator into a resistance value. It is then input into the A/C
auto amp.

In-vehicle Sensor Circuit

Aspirator
The aspirator (1) is located on driver side of heater & cooling unit
assembly. It produces vacuum pressure due to air discharged from
the heater & cooling unit assembly, continuously taking compartment
air in the aspirator.

DTC Logic

INFOID:0000000003434423

DTC DETECTION LOGIC

JPIIA0557ZZ

JPIIA0613GB

JPIIA0517ZZ

RJIA1804E

Revision: 2008 October

2009 Murano

HAC-48

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2578, B2579 IN-VEHICLE SENSOR

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

HAC-

42, "DTC Logic"

HAC-43, "DTC Logic"

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

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-

42, "DTC Logic"

HAC-43, "DTC Logic"

Is DTC No.“B2578” or “B2579” displayed?

YES

>> Perform trouble diagnosis for the in-vehicle sensor. Refer to

HAC-48, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003073079

CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND

Disconnect in-vehicle sensor connector.

Turn ignition switch ON.

Check voltage between in-vehicle sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between in-vehicle sensor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK IN-VEHICLE SENSOR

Check in-vehicle sensor. Refer to

HAC-49, "Component Inspection"

Is the inspection result normal?

YES

>> Replace A/C auto amp.

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2578

IN CAR SEN SHORT

Detected temperature at in-vehicle
sensor

−

C (

−

F) or less

• In-vehicle sensor
• A/C auto amp.
• Harness and connector

(In-vehicle sensor circuit is open,
or there is a short in the circuit)

B2579

IN CAR SEN OPEN

Detected temperature at in-vehicle
sensor 100

C (212

F) or more

(+)

(

−

)

Voltage

In-vehicle sensor

—

Connector

Terminal

M41

Ground

Approx. 5 V

In-vehicle sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M41

M50

Existed

Revision: 2008 October

2009 Murano

B2578, B2579 IN-VEHICLE SENSOR

HAC-49

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

>> Replace in-vehicle sensor.

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between in-vehicle sensor harness connector and A/C auto amp. harness connector.

Check continuity between in-vehicle sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Repair harness or connector.

Component Inspection

INFOID:0000000003073080

CHECK IN-VEHICLE SENSOR

Turn ignition switch OFF.

Disconnect in-vehicle sensor connector. Refer to

VTL-26, "Exploded View"

Check resistance between in-vehicle sensor terminals.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace in-vehicle sensor.

In-vehicle sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M41

M50

Existed

In-vehicle sensor

—

Continuity

Connector

Terminal

M41

Ground

Not existed

Terminal

Condition

Resistance k

Ω

Temperature

C (

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32)

6.19

5 (41)

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

Revision: 2008 October

2009 Murano

HAC-50

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2581, B2582 INTAKE SENSOR

B2581, B2582 INTAKE SENSOR

Description

INFOID:0000000003073085

Intake Sensor
• The intake sensor (1) is located on the evaporator (2).
• It converts air temperature after it passes through the evaporator

into a resistance value which is then input to the A/C auto amp.

Intake Sensor Circuit

DTC Logic

INFOID:0000000003435001

DTC DETECTION LOGIC

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

HAC-

42, "DTC Logic"

HAC-43, "DTC Logic"

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

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-

42, "DTC Logic"

HAC-43, "DTC Logic"

Is DTC No.“B2581” or “B2582” displayed?

YES

>> Perform trouble diagnosis for the intake sensor. Refer to

HAC-50, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003073087

CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

JPIIA1351ZZ

JPIIA0614GB

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2581

EVAP TEMP SEN SHORT

Detected temperature at intake sensor

−

C (

−

F) or less

• Intake sensor
• A/C auto amp.
• Harness and connector

(Intake sensor circuit is open, or there is a
short in the circuit)

B2582

EVAP TEMP SEN OPEN

Detected temperature at intake sensor
69

C (156

F) or more

Revision: 2008 October

2009 Murano

B2581, B2582 INTAKE SENSOR

HAC-51

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

Disconnect intake sensor connector.

Turn ignition switch ON.

Check voltage between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between intake sensor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK INTAKE SENSOR

Check intake sensor. Refer to

HAC-51, "Component Inspection"

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Replace intake sensor.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between intake sensor harness connector and A/C auto amp. harness connector.

Check continuity between intake sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Repair harness or connector.

Component Inspection

INFOID:0000000003073088

CHECK INTAKE SENSOR

Turn ignition switch OFF.

Disconnect intake sensor connector.

Check resistance between intake sensor terminals.

(+)

(

−

)

Voltage

Intake sensor

—

Connector

Terminal

M42

Ground

Approx. 5 V

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

M50

Existed

Intake sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M42

M50

Existed

Intake sensor

—

Continuity

Connector

Terminal

M42

Ground

Not existed

Revision: 2008 October

2009 Murano

HAC-52

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2581, B2582 INTAKE SENSOR

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace intake sensor.

Terminal

Condition

Resistance k

Ω

Temperature

C (

−

15 (5)

18.63

−

10 (14)

14.15

−

5 (23)

10.86

0 (32)

8.41

5 (41)

6.58

10 (50)

5.19

15 (59)

4.12

20 (68)

3.30

25 (77)

2.67

30 (86)

2.17

35 (95)

1.78

40 (104)

1.46

45 (113)

1.21

Revision: 2008 October

2009 Murano

B2630, B2631 SUNLOAD SENSOR

HAC-53

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

B2630, B2631 SUNLOAD SENSOR

Description

INFOID:0000000003073081

COMPONENT DESCRIPTION

Sunload Sensor

• The sunload sensor (1) is located on the driver’s side instrument

panel & pad.

• It detects sunload entering through windshield by means of a

photo diode. The sensor converts the sunload into a current value
which is then input into the A/C auto amp.

Sunload Sensor Circuit

SUNLOAD INPUT PROCESS

The A/C auto amp. also equips a processing circuit which averages the variations in detected sunload over a
period of time. This prevents drastic swings in the air temperature control system operation due to small or
quick variations in detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor varies whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the air temperature control system operation. On the
other hand, shortly after entering a long tunnel, the system recognizes the change in sunload, and the system
reacts accordingly.

DTC Logic

INFOID:0000000003435966

DTC DETECTION LOGIC

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

HAC-

42, "DTC Logic"

HAC-43, "DTC Logic"

• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.

When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).

JPIIA0559ZZ

JPIIA0615GB

DTC

Items

(CONSULT-III screen

terms)

Diagnostic item is detected when...

Possible cause

B2630

SUNLOAD SEN SHORT

Detected calorie at sunload sensor 64.7 w/m

(56 kcal/m

·h) or less

• Sunload sensor
• A/C auto amp.
• Harness and connector

(Sunload sensor circuit is open, or
there is a short in the circuit)

B2631

SUNLOAD SEN OPEN

Detected calorie at sunload sensor 2832 w/m

(2436 kcal/m

·h) or more

Revision: 2008 October

2009 Murano

HAC-54

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2630, B2631 SUNLOAD SENSOR

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

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-

42, "DTC Logic"

HAC-43, "DTC Logic"

• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.

When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).

Is DTC No.“B2630” or “B2631” displayed?

YES

>> Perform trouble diagnosis for the sunload sensor. Refer to

HAC-54, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003073083

CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND

Disconnect sunload sensor connector.

Turn ignition switch ON.

Check voltage between sunload sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair harness or connector.

CHECK SUNLOAD SENSOR

Reconnect sunload sensor connector and A/C auto amp. connector.

Check sunload sensor. Refer to

HAC-55, "Component Inspection"

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Replace sunload sensor.

CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.

Turn ignition switch OFF.

Disconnect A/C auto amp. connector.

Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.

(+)

(

−

)

Voltage

Sunload sensor

—

Connector

Terminal

M74

Ground

Approx. 5 V

Sunload sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M74

M50

Existed

Revision: 2008 October

2009 Murano

B2630, B2631 SUNLOAD SENSOR

HAC-55

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

Check continuity between sunload sensor harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp.

>> Repair harness or connector.

Component Inspection

INFOID:0000000003073084

CHECK SUNLOAD SENSOR

Turn ignition switch ON.

Check voltage between A/C auto amp. harness connector and ground.

NOTE:
Select a place where sunshine directly on it when checking sunload sensor.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace sunload sensor.

Sunload sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M74

M50

Existed

Sunload sensor

—

Continuity

Connector

Terminal

M74

Ground

Not existed

(+)

(

−

)

A/C auto amp.

—

Connector

Terminal

M50

Ground

SHA930E

Revision: 2008 October

2009 Murano

HAC-56

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2632, B2633 AIR MIX DOOR MOTOR (DRIVER SIDE)

B2632, B2633 AIR MIX DOOR MOTOR (DRIVER SIDE)

Description

INFOID:0000000003412929

COMPONENT DESCRIPTION

Air Mix Door Motor (Driver Side)

• The air mix door motor (driver 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:0000000003441410

DTC DETECTION LOGIC

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

HAC-

42, "DTC Logic"

HAC-43, "DTC Logic"

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

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-

42, "DTC Logic"

HAC-43, "DTC Logic"

Is DTC No.“B2632” or “B2633” displayed?

YES

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

HAC-57, "Diagnosis

Procedure"

>> GO TO 2.

FUNCTION INSPECTION

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

C (90

F) is displayed.

Check for warm air at discharge air outlets.

Operate the compressor.

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

C (60

F) is displayed.

Check for cool air at air discharge outlets.

Does it operate normally?

YES

>> INSPECTION END

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

Vehicle front

JPIIA0515ZZ

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

B2632

DR AIRMIX ACTR SHORT

Air mix door PBR (driver 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)

B2633

DR AIRMIX ACTR OPEN

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

Revision: 2008 October

2009 Murano

B2632, B2633 AIR MIX DOOR MOTOR (DRIVER SIDE)

HAC-57

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

HAC

Diagnosis Procedure

INFOID:0000000003412931

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

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

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the harnesses or connectors.

CHECK SIGNAL FOR AIR MIX DOOR MOTOR (DRIVER SIDE)

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

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair the harnesses or connectors.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT

Turn ignition switch OFF.

Disconnect air mix door motor (driver side) connector.

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

Is the inspection result normal?

YES

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

>> Repair harness or connector.

(+)

(

−

)

Voltage

Air mix door motor (driver side)

—

Connector

Terminal

M306

Ground

Battery voltage

(+)

(

−

)

Voltage

Air mix door motor (driver side)

—

Connector

Terminal

M306

Ground

SJIA1453J

Air mix door motor (driver side)

—

Continuity

Connector

Terminal

M306

Ground

Existed

Revision: 2008 October

2009 Murano

HAC-58

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

Description

INFOID:0000000003441586

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:0000000003441587

DTC DETECTION LOGIC

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

HAC-

42, "DTC Logic"

HAC-43, "DTC Logic"

DTC CONFIRMATION PROCEDURE

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

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

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-

42, "DTC Logic"

HAC-43, "DTC Logic"

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

YES

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

HAC-59, "Diagno-

sis Procedure"

>> GO TO 2.

FUNCTION INSPECTION

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

C (90

F) is displayed.

Check for warm air at discharge air outlets.

Operate the compressor.

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

C (60

F) is displayed.

Check for cool air at air discharge outlets.

Does it operate normally?

YES

>> INSPECTION END

>> 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

Revision: 2008 October

2009 Murano

Nissan Murano Z51 (2008 year). Manual - part 223