Nissan Murano Z51. Instruction — part 846
DIAGNOSIS SYSTEM (HVAC)
HAC-39
< SYSTEM DESCRIPTION >
[WITHOUT 7 INCH DISPLAY]
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DIAGNOSIS SYSTEM (HVAC)
CONSULT-III Function
INFOID:0000000005514595
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
HAC-40
< SYSTEM DESCRIPTION >
[WITHOUT 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
DIAGNOSIS SYSTEM (HVAC)
HAC-41
< SYSTEM DESCRIPTION >
[WITHOUT 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-9, "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-42
< SYSTEM DESCRIPTION >
[WITHOUT 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-10, "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-10, "Inlet Port
Memory Function (REC)"
Work item
Description
Reference
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