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Nissan Pathfinder. Manual - part 694

OPERATION

HAC-37

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

Display screen

Controller (A/C and AV switch assembly)

Switch Operation

JMIIA0720ZZ

Fan switch

Temperature control (Driver side)

AUTO switch

OFF switch

REAR switch

MODE switch

ALIIA0690ZZ

AUTO switch

Turns the switch indicator lamp and "AUTO" indicator on the display unit ON, and then rear air con-
ditioning system becomes the following state.
• Air outlet: Automatic control
• Blower fan: Automatic control
• Compressor: ON

Fan switch

Blower fan speed is manually controlled with this switch.
NOTE:
When fan switch is operated while air conditioning system is in automatic control (“AUTO” is indicat-
ed), automatic control is released (“AUTO” turns OFF).

MODE switch

Selects air outlet sequentially from VENT

⇒ B/L ⇒ FOOT ⇒ VENT each time.

NOTE:
When MODE switch is pressed while air conditioning system is in automatic control (“AUTO” is indi-
cated), automatic control is released (“AUTO” turns OFF).

ON/OFF switch

• Turns rear air conditioning system ON/OFF. (When rear control mode is ON)
• When rear air conditioning system turns OFF, air outlet become the automatic control.

HAC-38

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

OPERATION

REAR CONTROLLER OPERATION

Controller (Rear Air Control)

Switch Operation

REAR switch

• Turns the switch indicator lamp and rear control mode on the display unit ON, and then rear air con-

ditioning system becomes the following state.

- Air outlet: Automatic control
- Blower fan: Automatic control
- Compressor: ON
• Rear control mode is released when switch is pressed again (rear air conditioning system operates

continuously).

Temperature control
switch (Driver side)

• Selects set temperature within a range between 18.0

°C (60°F) – 32.0°C (90°F) at a rate of 0.5°C

°F) each time the dial is rotated.

- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while
front air conditioning system state (when MODE switch is pressed) is indicated on the display.

OFF switch

Fan switch

Display

Temperature control switch

AUTO switch

ALIIA0557ZZ

AUTO switch

Turns the switch indicator lamp and "AUTO" indicator on the display ON, and then rear air condition-
ing system becomes the following state.
• Air outlet: Automatic control
• Blower fan: Automatic control
• Compressor: ON

Fan switch (UP/DOWN)

Blower fan speed is manually controlled with these switches. Seven speeds are available for manual
control (as shown on the display screen).
NOTE:
When fan switch is pressed while air conditioning system is in automatic control (“AUTO” is indicated),
automatic control is released (“AUTO” turns OFF).

OFF switch

• Turns rear air conditioning system OFF.
• When rear air conditioning system turns OFF, air outlet become the automatic control.

Temperature control
switch

Setting temperature is selected using this switch with in a range between 18.0

°C (60°F) – 32.0°C

(90

°F) at a rate of 0.5°C (1°F) per adjustment.

•

: Press: Set temperature increases.

•

: Press: Set temperature decreases.

DIAGNOSIS SYSTEM (HVAC)

HAC-39

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

DIAGNOSIS SYSTEM (HVAC)

Description

INFOID:0000000009176800

Air conditioning system performs self-diagnosis, operation check, function diagnosis, and various settings

using diagnosis function of each control unit.

CONSULT Function

INFOID:0000000009176801

CAUTION:

After disconnecting the CONSULT vehicle interface (VI) from the data link connector, the ignition must

be cycled OFF

→ ON (for at least 5 seconds) → OFF. If this step is not performed, the BCM may not go

to “sleep mode”, potentially causing a discharged battery and a no-start condition.

CONSULT performs the following functions via CAN communication with A/C auto amp.

APPLICATION ITEMS

NOTE:

Diagnosis should be performed with engine running. Door motor operation speeds become slower and NO

results may be returned even for normal operation if battery voltage drops below 12 V during self-diagnosis.

SELF-DIAGNOSIS RESULTS

Refer to

HAC-46, "DTC Index"

ACTIVE TEST

Check each output device

ECU

Diagnostic item

(CONSULT)

A/C auto amp.

HVAC

Self Diagnostic Result

Data Monitor

Active Test

Work support

AV control unit

MULTI AV

Self Diagnostic Result

Multi AV system on board diagnosis function

ECM

ENGINE

Self Diagnostic Result

Data Monitor

IPDM E/R

Self Diagnostic Result

Data Monitor

Auto active test

Diagnostic mode

Description

Self Diagnostic Result

Displays the diagnosis results judged by A/C auto amp.

Data Monitor

Displays the input/output signal of A/C auto amp.

Active Test

The signals used to activate each device are forcibly supplied from A/C auto amp.

Work support

Changes the setting for each setting function.

ECU identification

Displays the part number of A/C auto amp.

Test item

Description

HVAC TEST

The operation check of air conditioning system can be performed by selecting the mode.
Refer to the following table for the conditions of each mode.

HAC-40

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

DIAGNOSIS SYSTEM (HVAC)

NOTE:

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

DATA MONITOR

Display item list

Test item

MODE 1

MODE 2

MODE 3

MODE 4

MODE 5

MODE 6

MODE 7

Mode door motor (front) posi-
tion

VENT

B/L

D/F

DEF

Intake door motor position

REC

20% FRE

FRE

Air mix door motor (driver side)
position

FULL COLD FULL COLD FULL COLD

FULL HOT

Air mix door motor (passenger
side) position

FULL COLD FULL COLD FULL COLD

FULL HOT

Front blower motor control sig-
nal duty ratio

30%

60%

Magnet clutch

OFF

Mode door motor (rear) posi-
tion

VENT

FOOT

Air mix door motor (rear) posi-
tion

FULL COLD FULL COLD FULL COLD

FULL HOT

Rear shut-off door motor posi-
tion

FR / INT

OPEN

FR / INT

OPEN

FR / INT

OPEN

PTC heater 1

OFF

PTC heater 2

OFF

Rear blower motor 1 control
signal

Rear blower motor 2 control
signal

Monitor item [Unit]

Description

AMB TEMP SEN

[

°C (°F)]

Ambient sensor value converted from ambient sensor signal received from ambient sen-
sor.

IN-VEH TEMP

[

°C (°F)]

In-vehicle sensor value converted from in-vehicle sensor signal received from in-vehicle
sensor.

INT TEMP SEN

[

°C (°F)] Intake sensor value converted from intake sensor signal received from intake sensor.

SUNLOAD SEN

[w/m

]

Sunload sensor value converted from sunload sensor signal received from sunload sen-
sor.

AMB SEN CAL

[

°C (°F)] Ambient temperature value calculated by A/C auto amp.

IN-VEH CAL

[

°C (°F)] In-vehicle temperature value calculated by A/C auto amp.

INT TEMP CAL

[

°C (°F)] Front evaporator fin temperature value calculated by A/C auto amp.

SUNL SEN CAL

[w/m

] Sunload value calculated by A/C auto amp.

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 front blower motor ON/OFF status transmitted to other units via CAN commu-
nication.

FAN DUTY

Duty ratio of front blower motor judged by A/C auto amp.

Target discharge front air temperature (driver side) judged by A/C auto amp. depending
on the temperature setting and the value from each sensor.

RR XM

Target discharge rear air temperature judged by A/C auto amp. depending on the tem-
perature setting and the value from each sensor.

PA TARGET A/TEMP

Target discharge front air temperature (passenger side) judged by A/C auto amp. de-
pending on the temperature setting and the value from each sensor.

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