Nissan Murano Z51 (2008 year). Manual — part 230
MAGNET CLUTCH CONTROL SYSTEM
HAC-155
< FUNCTION DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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MAGNET CLUTCH CONTROL SYSTEM
System Diagram
INFOID:0000000003469283
System Description
INFOID:0000000003469284
The A/C auto amp. controls compressor operation by ambient temperature, intake air temperature and signal
from ECM.
SYSTEM OPERATION
When the A/C switch, the AUTO switch, or the DEF switch is pressed, or when shifting mode position D/F, A/C
auto amp. transmit the A/C switch signal and blower fan motor switch signal to the ECM, via CAN communica-
tion.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If the ECM judges that the compressor can be turned ON, it sends A/C com-
pressor request signal to the IPDM E/R, via CAN communication.
Upon receipt of A/C compressor request signal from the ECM, the IPDM E/R turns the A/C relay ON to oper-
ate the compressor.
When sending A/C compressor request signal to the IPDM E/R via CAN communication line, the ECM simul-
taneously sends A/C compressor feedback signal to A/C auto amp. via CAN communication line.
The ECM sends A/C compressor feedback signal to A/C auto amp., then, uses input A/C compressor feed-
back signal to control air inlet.
Compressor Protection Control
The ECM makes the A/C relay turn OFF and stops the compressor when pressure on the high-pressure side
detected by the refrigerant pressure sensor is over approximately 3,119 kPa (31.8 kg/cm
2
, 452 psi), or below
approximately 118 kPa (1.2 kg/cm
2
, 17 psi).
Low Temperature Protection Control
Turn the A/C relay to OFF and stop the compressor by the signal from the A/C auto amp according to the
evaporator passing air temperature detected by the intake sensor and the ambient temperature detected by
the ambient sensor.
JSIIA1548GB
Revision: 2008 October
2009 Murano
HAC-156
< FUNCTION DIAGNOSIS >
[WITH 7 INCH DISPLAY]
CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM
System Description
INFOID:0000000003469264
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto each vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only. For details, refer to
LAN-25, "CAN System Specification Chart"
Revision: 2008 October
2009 Murano
DIAGNOSIS SYSTEM (HVAC)
HAC-157
< FUNCTION DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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DIAGNOSIS SYSTEM (HVAC)
CONSULT-III Function
INFOID:0000000003469268
CONSULT-III can display each diagnosis item using the diagnosis test modes shown as per the following.
CONSULT-III application items
SELF DIAGNOSTIC RESULT
Display Item List
Diagnosis mode
Description
ECU Identification
Displays the A/C auto amp. number.
Self Diagnostic Result
Displays the diagnosis results judged by A/C auto amp.
Data Monitor
Displays A/C auto amp. input/output data in real time.
Active Test
The signals used to activate each device are forcibly supplied from A/C auto amp.
Work Support
Changes the setting for each system function.
• Temperature setting trimmer
• Inlet port memory function (FRE)
• Inlet port memory function (REC)
• Foot position setting trimmer
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
U1000
CAN COMM CIRCUIT
When A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.
CAN communication system
U1010
CONTROL UNIT (CAN)
When detecting error during the initial
diagnosis of CAN controller of A/C auto
amp.
A/C auto amp.
B257B
AMB TEMP SEN SHORT
Detected temperature at ambient sen-
sor
−
44
°
C (
−
47
°
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 sen-
sor 100
°
C (212
°
F) or more
B2578
IN CAR SEN SHORT
Detected temperature at in-vehicle sen-
sor
−
44
°
C (
−
47
°
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 sen-
sor 100
°
C (212
°
F) or more
B2581
EVAP TEMP SEN SHORT
Detected temperature at intake sensor
−
33
°
C (
−
27
°
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
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
B2632
DR AIRMIX ACTR SHORT
Air mix door PBR (driver side) position
5% or less
• Air mix door motor (driver side)
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted)
B2633
DR AIRMIX ACTR OPEN
Air mix door PBR (driver side) position
95% or more
Revision: 2008 October
2009 Murano
HAC-158
< FUNCTION DIAGNOSIS >
[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
*: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise self-diag-
nosis indicates even though the sunload sensor is functioning normally.
DATA MONITOR
Display item list
B2634
PASS AIRMIX ACTR SHORT
Air mix door PBR (passenger side) po-
sition 5% or less
• Air mix door motor (passenger
side)
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted)
B2635
PASS AIRMIX ACTR OPEN
Air mix door PBR (passenger side) po-
sition 95% or more
B2636
DR VENT DOOR FAIL
When the malfunctioning door position
is detected at VENT position
• Mode door motor
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Mode door motor 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
B263D
FRE DOOR FAIL
When the malfunctioning intake door
position is detected at FRE position
• Intake door motor
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Intake door motor is open or
shorted)
B263E
20P FRE DOOR FAIL
When the malfunctioning intake door
position is detected at 20%FRE posi-
tion
B263F
REC DOOR FAIL
When the malfunctioning intake door
position is detected at REC position
B2654
D/F2 DOOR FAIL
When the malfunctioning door position
is detected at D/F position
• Mode door motor
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Mode door motor is open or
shorted)
B2655
B/L2 DOOR FAIL
When the malfunctioning door position
is detected at B/L2 position
B2661
UPPER VENT DOOR OPEN POSI
FAIL
When the malfunctioning upper ventila-
tor door position is detected at open po-
sition.
• Upper ventilator door motor
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Upper ventilator door motor is
open or shorted)
B2662
UPPER VENT DOOR MID POSI FAIL
When the malfunctioning upper ventila-
tor door position is detected at middle
position.
B2663
UPPER VENT DOOR SHUT POSI
FAIL
When the malfunctioning upper ventila-
tor door position is detected at shut po-
sition.
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
Monitor item [Unit]
Description
COMP REQ SIG
[On/Off]
Displays A/C switch ON/OFF status transmitted to other units via CAN communication
FAN REQ SIG
[On/Off]
Displays blower switch ON/OFF status transmitted to other units via CAN communica-
tion
AMB TEMP SEN
[
°
C]
Ambient sensor value converted from ambient sensor signal received from ambient
sensor
IN-VEH TEMP
[
°
C]
In-vehicle sensor value converted from in-vehicle sensor signal received from in-vehi-
cle sensor
INT TEMP SEN
[
°
C]
Intake sensor value converted from intake sensor signal received from intake sensor
SUNLOAD SEN
[w/m
2
]
Sunload sensor value converted from sunload sensor signal received from sunload
sensor
Revision: 2008 October
2009 Murano
DIAGNOSIS SYSTEM (HVAC)
HAC-159
< FUNCTION DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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ACTIVE TEST
HVAC TEST
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.
WORK SUPPORT
AMB SEN CAL
[
°
C]
Ambient sensor value calculated by A/C auto amp.
IN-VEH CAL
[
°
C]
In-vehicle sensor value calculated by A/C auto amp.
INT TEMP CAL
[
°
C]
Intake sensor value calculated by A/C auto amp.
SUNL SEN CAL
[w/m
2
]
Sunload sensor value calculated by A/C auto amp.
FAN DUTY
Duty ratio of blower motor judged by A/C auto amp.
XM
Target discharge air temperature judged by A/C auto amp. according to the tempera-
ture setting and the value from each sensor
ENG COOL TEMP
[
°
C]
Water temperature signal value received from ECM via CAN communication
VEHICLE SPEED
[Mph
(km/h)]
Vehicle speed signal value received from meter via CAN communication
Monitor item [Unit]
Description
Test item
Description
ALL SEG
NOTE:
• Item can be displayed but cannot be tested.
• When choosing to turn “ALL SEG” on, error message is displayed but it is not malfunction.
HVAC TEST
The operation check of A/C system can be performed by selecting the mode. Refer to the
following table for the conditions of each mode.
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
Work item
Description
Reference
TEMP SET CORRECT
(Setting of difference between tem-
perature setting and control tempera-
ture)
If the temperature felt by the customer is different than the air flow
temperature controlled by the temperature setting, the auto ampli-
fier control temperature can be adjusted to compensate for the
temperature setting.
HAC-128, "Temperature
Setting Trimmer"
BLOW SET
(Blow setting to DEF in FOOT mode)
In the FOOT mode, the air blowing to the DEF can change ON/
OFF.
HAC-128, "Foot Position
Setting Trimmer"
Revision: 2008 October
2009 Murano
HAC-160
< FUNCTION DIAGNOSIS >
[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of
WORK SUPPORT may be cancelled.
FRE MEMORY SET
(FRE memory function setting)
• If the ignition switch is turned to the OFF position while the FRE
switch is set to ON (fresh air intake), “Perform the memory” or
“Do not perform the memory” of the FRE switch ON (fresh air in-
take) condition can be selected.
• If “Perform the memory” was set, the FRE switch will be ON
(fresh air intake) when turning the ignition switch to the ON posi-
tion again.
• If “Do not perform the memory” was set, the air inlets will be con-
trolled automatically when turning the ignition switch to the ON
position again.
HAC-129, "Inlet Port
Memory Function (FRE)"
REC MEMORY SET
(REC memory function setting)
• If the ignition switch is turned to the OFF position while the REC
switch is set to ON (recirculation), “Perform the memory” or “Do
not perform the memory” of the REC switch ON (recirculation)
condition can be selected.
• If “Perform the memory” was set, the REC switch will be ON (re-
circulation) when turning the ignition switch to the ON position
again.
• If “Do not perform the memory” was set, the air inlets will be con-
trolled automatically when turning the ignition switch to the ON
position again.
HAC-129, "Inlet Port
Memory Function (REC)"
Work item
Description
Reference
Revision: 2008 October
2009 Murano
U1000 CAN COMM CIRCUIT
HAC-161
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000003469285
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with two
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to
LAN-15, "How to Use CAN Communication Signal Chart"
.
DTC Logic
INFOID:0000000003469286
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000003469287
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Turn ignition switch ON and wait for 2 or more seconds.
2.
Using CONSULT-III, perform “SFLF-DIAGNOSIS RESULTS” of HVAC.
Is “CAN COMM CIRCUIT” displayed?
YES
>> Perform trouble diagnosis for the CAN communication system. Refer to
.
NO
>> Perform the intermittent malfunction diagnosis. Refer to
GI-40, "Intermittent Incident"
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
U1000
CAN COMM CIRCUIT
When A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.
CAN communication system
Revision: 2008 October
2009 Murano
HAC-162
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000003469288
Initial diagnosis of A/C auto amp.
DTC Logic
INFOID:0000000003469289
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000003469290
1.
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.
NO
>> 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
B257B, B257C AMBIENT SENSOR
HAC-163
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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B257B, B257C AMBIENT SENSOR
Description
INFOID:0000000003469291
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:0000000003469292
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
or
.
• If there is an open circuit in the ambient sensor, A/C auto amp. registers extreme cold [
−
44
°
C (
−
47
°
F)] and
adjusts the temperature control warmer.
DTC CONFIRMATION PROCEDURE
1.
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
−
44
°
C (
−
47
°
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
HAC-164
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B257B, B257C AMBIENT SENSOR
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
.
• If there is an open circuit in the ambient sensor, A/C auto amp. registers extreme cold [
−
44
°
C (
−
47
°
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-164, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003469294
1.
CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND
1.
Disconnect ambient sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between ambient sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between ambient 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 AMBIENT SENSOR
Check ambient sensor. Refer to
HAC-165, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp.
NO
>> Replace ambient sensor.
4.
CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.
4.
Check continuity between ambient sensor harness connector and ground.
(+)
(
−
)
Voltage
Ambient sensor
—
Connector
Terminal
E337
1
Ground
Approx. 5 V
Ambient sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E337
2
M50
37
Existed
Ambient sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E337
1
M50
35
Existed
Revision: 2008 October
2009 Murano
B257B, B257C AMBIENT SENSOR
HAC-165
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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HAC
N
O
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Is the inspection result normal?
YES
>> Replace A/C auto amp.
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000003469295
1.
CHECK AMBIENT SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect ambient sensor connector. Refer to
3.
Check resistance between ambient sensor terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ambient sensor.
Ambient sensor
—
Continuity
Connector
Terminal
E337
1
Ground
Not existed
Terminal
Condition
Resistance k
Ω
Temperature
°
C (
°
F)
1
2
−
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-166
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2578, B2579 IN-VEHICLE SENSOR
B2578, B2579 IN-VEHICLE SENSOR
Description
INFOID:0000000003469296
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:0000000003469297
DTC DETECTION LOGIC
JPIIA0557ZZ
JPIIA0613GB
JPIIA0517ZZ
RJIA1804E
Revision: 2008 October
2009 Murano
B2578, B2579 IN-VEHICLE SENSOR
HAC-167
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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HAC
N
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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.“B2578” or “B2579” displayed?
YES
>> Perform trouble diagnosis for the in-vehicle sensor. Refer to
HAC-167, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003469299
1.
CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND
1.
Disconnect in-vehicle sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between in-vehicle 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 IN-VEHICLE SENSOR
Check in-vehicle sensor. Refer to
HAC-168, "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
−
44
°
C (
−
47
°
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
1
Ground
Approx. 5 V
In-vehicle sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M41
2
M50
37
Existed
Revision: 2008 October
2009 Murano
HAC-168
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2578, B2579 IN-VEHICLE SENSOR
NO
>> Replace in-vehicle sensor.
4.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between in-vehicle sensor harness connector and A/C auto amp. harness connector.
4.
Check continuity between in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp.
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000003469300
1.
CHECK IN-VEHICLE SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect in-vehicle sensor connector. Refer to
.
3.
Check resistance between in-vehicle sensor terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace in-vehicle sensor.
In-vehicle sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M41
1
M50
36
Existed
In-vehicle sensor
—
Continuity
Connector
Terminal
M41
1
Ground
Not existed
Terminal
Condition
Resistance k
Ω
Temperature
°
C (
°
F)
1
2
−
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
B2581, B2582 INTAKE SENSOR
HAC-169
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
B2581, B2582 INTAKE SENSOR
Description
INFOID:0000000003469301
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:0000000003469303
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.“B2581” or “B2582” displayed?
YES
>> Perform trouble diagnosis for the intake sensor. Refer to
HAC-169, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003469304
1.
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
−
33
°
C (
−
27
°
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
HAC-170
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
B2581, B2582 INTAKE SENSOR
1.
Disconnect intake sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between intake sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between intake 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 INTAKE SENSOR
Check intake sensor. Refer to
HAC-170, "Component Inspection"
Is the inspection result normal?
YES
>> Replace A/C auto amp.
NO
>> Replace intake sensor.
4.
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between intake sensor harness connector and A/C auto amp. harness connector.
4.
Check continuity between intake sensor harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp.
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000003469305
1.
CHECK INTAKE SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect intake sensor connector.
3.
Check resistance between intake sensor terminals.
(+)
(
−
)
Voltage
Intake sensor
—
Connector
Terminal
M42
1
Ground
Approx. 5 V
Intake sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M42
2
M50
37
Existed
Intake sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M42
1
M50
16
Existed
Intake sensor
—
Continuity
Connector
Terminal
M42
1
Ground
Not existed
Revision: 2008 October
2009 Murano
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