Nissan Murano. Manual - part 848

HAC-166

< SYSTEM DESCRIPTION >

[WITH 7 INCH DISPLAY]

DIAGNOSIS SYSTEM (HVAC)

DIAGNOSIS SYSTEM (HVAC)

CONSULT Function

INFOID:0000000009722155

CONSULT can display each diagnosis item using the diagnosis test modes shown as per the following.

CONSULT application items

SELF DIAGNOSTIC RESULT

Refer to 

HAC-230, "DTC Index"

.

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 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

DIAGNOSIS SYSTEM (HVAC)

HAC-167

< SYSTEM DESCRIPTION >

[WITH 7 INCH DISPLAY]

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*: 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

NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.

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 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 

HAC-168

< SYSTEM DESCRIPTION >

[WITH 7 INCH DISPLAY]

DIAGNOSIS SYSTEM (HVAC)

ACTIVE TEST

HVAC TEST

NOTE:

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

WORK SUPPORT

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 

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-136, "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-136, "Foot Position 
Setting Trimmer"

DIAGNOSIS SYSTEM (HVAC)

HAC-169

< SYSTEM DESCRIPTION >

[WITH 7 INCH DISPLAY]

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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-137, "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-137, "Inlet Port 
Memory Function (REC)"

Work item

Description

Reference