Nissan Murano Z51 (2008 year). Manual — part 231
B2581, B2582 INTAKE SENSOR
HAC-171
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
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A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace intake sensor.
Terminal
Condition
Resistance k
Ω
Temperature
°
C (
°
F)
1
2
−
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
HAC-172
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2630, B2631 SUNLOAD SENSOR
B2630, B2631 SUNLOAD SENSOR
Description
INFOID:0000000003469306
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:0000000003469308
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
or
.
• 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
2
(56 kcal/m
2
·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
2
(2436 kcal/m
2
·h) or more
Revision: 2008 October
2009 Murano
B2630, B2631 SUNLOAD SENSOR
HAC-173
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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A
B
HAC
N
O
P
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
or
.
• 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-173, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003469309
1.
CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND
1.
Disconnect sunload sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between sunload sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK SUNLOAD SENSOR
1.
Reconnect sunload sensor connector and A/C auto amp. connector.
2.
Check sunload sensor. Refer to
HAC-174, "Component Inspection"
Is the inspection result normal?
YES
>> Replace A/C auto amp.
NO
>> Replace sunload sensor.
4.
CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.
(+)
(
−
)
Voltage
Sunload sensor
—
Connector
Terminal
M74
1
Ground
Approx. 5 V
Sunload sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M74
2
M50
37
Existed
Revision: 2008 October
2009 Murano
HAC-174
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2630, B2631 SUNLOAD SENSOR
4.
Check continuity between sunload sensor harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp.
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000003469310
1.
CHECK SUNLOAD SENSOR
1.
Turn ignition switch ON.
2.
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
NO
>> Replace sunload sensor.
Sunload sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M74
1
M50
15
Existed
Sunload sensor
—
Continuity
Connector
Terminal
M74
1
Ground
Not existed
(+)
(
−
)
A/C auto amp.
—
Connector
Terminal
M50
15
Ground
SHA930E
Revision: 2008 October
2009 Murano
B2632, B2633 AIR MIX DOOR MOTOR (DRIVER SIDE)
HAC-175
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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HAC
N
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B2632, B2633 AIR MIX DOOR MOTOR (DRIVER SIDE)
Description
INFOID:0000000003469311
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:0000000003469312
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
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
Is DTC No.“B2632” or “B2633” displayed?
YES
>> Perform trouble diagnosis for the air mix door motor (driver side). Refer to
.
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1.
Press temperature control “UP” dial (driver 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” dial (driver side) until 18
°
C (60
°
F) is displayed.
5.
Check for cool air at air discharge outlets.
Does it operate normally?
YES
>> END.
NO
>> 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
HAC-176
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2632, B2633 AIR MIX DOOR MOTOR (DRIVER SIDE)
Diagnosis Procedure
INFOID:0000000003469314
1.
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.
NO
>> Repair the harnesses or connectors.
2.
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.
NO
>> Repair the harnesses or connectors.
3.
CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect air mix door motor (driver side) connector.
3.
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).
NO
>> Repair harness or connector.
(+)
(
−
)
Voltage
Air mix door motor (driver side)
—
Connector
Terminal
M306
1
Ground
Battery voltage
(+)
(
−
)
Voltage
Air mix door motor (driver side)
—
Connector
Terminal
M306
3
Ground
SJIA1453J
Air mix door motor (driver side)
—
Continuity
Connector
Terminal
M306
2
Ground
Existed
Revision: 2008 October
2009 Murano
B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)
HAC-177
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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HAC
N
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B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)
Description
INFOID:0000000003469325
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:0000000003469326
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
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
Is DTC No.“B2634” or “B2635” displayed?
YES
>> Perform trouble diagnosis for the air mix door motor (passenger side). Refer to
.
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1.
Press temperature control “UP” dial (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” dial (passenger side) until 18
°
C (60
°
F) is displayed.
5.
Check for cool air at air discharge outlets.
Does it operate normally?
YES
>> 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
Revision: 2008 October
2009 Murano
HAC-178
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)
Diagnosis Procedure
INFOID:0000000003469327
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
Revision: 2008 October
2009 Murano
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
HAC-179
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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HAC
N
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B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
Description
INFOID:0000000003469329
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:0000000003469330
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
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
Is DTC No.“ B2636 ”, “ B2637 ”, “B2638 ”, “B2639 ”, “B2654 ” or “B2655 ” displayed?
YES
>> Perform trouble diagnosis for the mode door motor. Refer to
HAC-180, "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
Revision: 2008 October
2009 Murano
HAC-180
< COMPONENT DIAGNOSIS >
[WITH 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
.
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:0000000003469332
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
Revision: 2008 October
2009 Murano
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
HAC-181
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK MODE DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect mode door motor connector.
3.
Check continuity between mode door motor harness connector and ground.
Is the inspection result normal?
YES
>> Replace mode door motor.
NO
>> Repair harness or connector.
(+)
(
−
)
Voltage
Mode door motor
—
Connector
Terminal
M310
3
Ground
SJIA1453J
Mode door motor
—
Continuity
Connector
Terminal
M310
2
Ground
Existed
Revision: 2008 October
2009 Murano
HAC-182
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B263D, B263E, B263F INTAKE DOOR MOTOR
B263D, B263E, B263F INTAKE DOOR MOTOR
Description
INFOID:0000000003469334
COMPONENT DESCRIPTION
Intake Door Motor
• The intake door motor (1) is attached to the blower unit.
• It rotates so that air is drawn from inlets set by the A/C auto amp.
Motor rotation is conveyed to a lever which activates the intake
door.
DTC Logic
INFOID:0000000003469335
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
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
Is DTC No.“B263D”, “B263E” or “B263F” displayed?
YES
>> Perform trouble diagnosis for the intake door motor. Refer to
HAC-183, "Diagnosis Procedure"
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1.
Press intake switch.
2.
The intake switch indicator is turned ON. (REC position)
3.
Listen for intake door position change (Slight change of blower sound can be heard.).
4.
Press intake switch again.
5.
The intake switch indicator is turned OFF. (FRE position)
6.
Listen for intake door position change (Slight change of blower sound can be heard.).
Does it operate normally?
YES
>> INSPECTION END
NO
>> Check intake door motor installation, and repair or replace the malfunctioning parts.
:
Vehicle front
JPIIA0516ZZ
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
B263D
FRE DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at FRE position
• Intake door motor (PBR internal
circuit is open or shorted)
• A/C auto amp.
• Harness and connector (LAN com-
munication line is open or shorted)
B263E
20P FRE DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at 20%FRE position
B263F
REC DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at REC position
Revision: 2008 October
2009 Murano
B263D, B263E, B263F INTAKE DOOR MOTOR
HAC-183
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
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M
A
B
HAC
N
O
P
Diagnosis Procedure
INFOID:0000000003469337
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
Revision: 2008 October
2009 Murano
HAC-184
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
Description
INFOID:0000000003469339
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:0000000003469341
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
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
Is DTC No.“B2661”, “B2662” or “B2663” displayed?
YES
>> Perform trouble diagnosis for the upper ventilator door motor. Refer to
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-III screen terms)
Diagnostic item is detected when...
Possible cause
B2661
UPPER VENT DOOR OPEN POSI
FAIL
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
UPPER VENT DOOR MID POSI
FAIL
When the malfunctioning upper ventilator
door position is detected at middle posi-
tion.
B2663
UPPER VENT DOOR SHUT POSI
FAIL
When the malfunctioning upper ventilator
door position is detected at shut position.
Revision: 2008 October
2009 Murano
B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
HAC-185
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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:0000000003469342
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
M51
2
Ground
Battery voltage
(+)
(
−
)
Voltage
Upper ventilator door motor
—
Connector
Terminal
M51
1
Ground
SJIA1453J
Revision: 2008 October
2009 Murano
HAC-186
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
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
M51
3
Ground
Existed
Revision: 2008 October
2009 Murano
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