2007 INFINITI M35 air condition

AIR CONDITIONER CONTROL
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Description of Control SystemNJS000G6
The control system consists of input sensors, switches, the unified meter and A/C amp. (microcomputer) and
outputs. The relationship of these components is shown in the figure below:
Control OperationNJS000G7
DISPLAY SCREEN
RJIA4021E
RJIA4022E

ATC-34
AIR CONDITIONER CONTROL
Revision: 2007 April2007 M35/M45
MULTIFUNCTION SWITCH
DISPLAY SCREEN
The operation status of the system is displayed on the screen.
MODE SWITCH (DRIVER SIDE)

Controls the air discharge outlets.

When the DUAL switch indicator is not illuminated, the driver side and passenger side outlets are
switched together.

When the DUAL switch indicator is illuminated, only the driver side outlet is switched.
MODE SWITCH (PASSENGER SIDE)
When the MODE switch (passenger side) is pressed, the DUAL switch indicator illuminates, and only the pas-
senger side outlet is switched.
TEMPERATURE CONTROL SWITCH (POTENTIO TEMPERATURE CONTROL) (DRIVER SIDE)
The set temperature is Increased or decreased with this switch.
TEMPERATURE CONTROL SWITCH (POTENTIO TEMPERATURE CONTROL) (PASSENGER
SIDE)

The set temperature is Increased or decreased with this switch.

When the temperature switch is pressed, the DUAL switch indicator will automatically illuminate.
AUTO SWITCH

The compressor, intake doors, air mix doors, mode doors and blower speed are automatically controlled
so that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the
operator.

When pressing AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automati-
cally controlled.
DEFROSTER (DEF) SWITCH
Mode doors are set to the defrost position with this switch. Also, intake doors are set to the outside air position,
and compressor turns ON.
UPPER VENT SWITCH

When UPPER VENT switch is ON, UPPER VENT switch indicator turn ON, and upper ventilator door is
automatically controlled.

When DEFROSTER (DEF) switch is ON, upper ventilator door is shut.

When MODE position (driver side) is FOOT or D/F, upper ventilation door is shut.
RJIA4023E

AIR CONDITIONER CONTROL
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When UPPER VENT switch is OFF, UPPER VENT switch indicator turn OFF, and upper ventilator door is
shut.
A/C SWITCH
Compressor is ON or OFF with this switch.
(Pressing the A/C switch when the A/C switch is ON will turn OFF the A/C switch and compressor.)
FAN SWITCHES
The blower speed is manually controlled with this switch. Seven speeds are available for manual control (as
shown on the display screen).
OFF SWITCH
Compressor and blower are OFF, the intake doors and the mode doors are automatically controlled.
REAR WINDOW DEFOGGER SWITCH
When illumination is ON, rear window is defogged.
INTAKE SWITCH

When intake switch is ON, FRE LED turns ON, and air inlet is fixed to FRE.

When press intake switch again, REC LED turns ON, and air inlet is fixed to REC.

When intake switch is pressed for approximately 1.5 seconds or longer, FRE and REC LEDs blink twice.
Then, automatic control mode is entered. Inlet status is displayed by LED even during automatic con-
trolled.

When FRE LED is turned ON, shifting mode position to D/F or DEF, or when compressor is turned from
ON to OFF, intake switch is automatically turned OFF (fixed to FRE mode). REC mode can be re-entered
by pressing intake switch again, and then compressor is turned ON. (Except D/F or DEF position)
DUAL SWITCH

When the DUAL switch indicator is illuminated, the driver side and passenger side temperature can each
be set independently.

When the DUAL switch indicator is not illuminated, the driver side outlet and setting temperature is
applied to both sides.
Control Operation (Rear Control Switch)NJS000G8
AUTO SWITCH

When pressing AUTO switch, display for turned on AUTO and fan speed is automatically controlled.

When pressing AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automati-
cally controlled.
FAN SWITCH
The blower speed is manually controlled with this switch. Five speeds are available for manual control (as
shown on the display screen).
RJIA4216E

ATC-36
AIR CONDITIONER CONTROL
Revision: 2007 April2007 M35/M45
REAR TEMPERATURE CONTROL SWITCH

Increases or decreases the set temperature.

A temperature for the rear seat with respect to a set temperature for the front seat can be adjusted by
operating switch.

Rear temperature control switch allows to select a temperature every 0.5°C (1°F) in the 18°C (60°F) to
32°C (90°F) range.

When the DUAL switch is ON, temperature for the rear seat changes keeping the temperature difference
between two front seats. [e.g. When lowering the set temperature for the rear seat 1°C (2°F) by operating
rear control switch at a set temperature of 25°C (77°F) for the driver’s seat and 26°C (79°F) for the pas-
senger’s seat, the set temperature for the driver’s seat and passenger’s seat lower 1°C (2°F) and become
24°C (75°F) for the driver’s seat and 25°C (77°F) for the passenger’s seat.]
NOTE:
A set temperature for the rear seat is tied to a set temperature for the passenger’s seat. Therefore, a set
temperature for the rear seat changes in conjunction with a set temperature for the passenger’s seat
(When the set temperature of front seats are independent).
Fail-Safe FunctionNJS000G9

If a communication error exists between the unified meter and A/C amp.,and the AV control unit or NAVI
control unit and multifunction switch for 30 seconds or longer, air conditioner is controlled under the follow-
ing conditions:
Compressor : ON
Air outlet : AUTO
Air inlet : FRE (Fresh)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs
Display : OFF

AIR CONDITIONER CONTROL
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Revision: 2007 April2007 M35/M45
Discharge Air FlowNJS000GA
RJIA4024E

ATC-38
AIR CONDITIONER CONTROL
Revision: 2007 April2007 M35/M45
System DescriptionNJS000GB
SWITCHES AND THEIR CONTROL FUNCTION
SJIA1730E
SJIA1766E

AIR CONDITIONER CONTROL
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CAN Communication System DescriptionNJS000GC
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 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-50,
"CAN System Specification Chart" .

ATC-40
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
TROUBLE DIAGNOSISPFP:00004
CONSULT-II Function (ECM)NJS000GD
CONSULT-II can display each diagnosis item using the diagnosis test modes shown following.
CONSULT-II BASIC OPERATION
Refer to GI-38, "CONSULT-II Start Procedure" .
DATA MONITOR
Operation Procedure
1. Touch “ENGINE” on “SELECT SYSTEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch “SELECTION FROM MENU” on “DATA MONITOR” screen.
4. When “SELECTION FROM MENU” is selected, touch items to be monitored.
5. Touch “START”.
6. Touch “RECORD” while monitoring, then the status of the monitored item can be recorded. To stop
recording, touch “STOP”.
Display Item List
How to Perform Trouble Diagnosis for Quick and Accurate RepairNJS000GE
WORK FLOW
System part Check item, diagnosis mode Description
ECM Data monitor Displays ECM input data in real time.
Monitor item name
“operation or unit”Contents
AIR COND SIG “ON/OFF” Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal.
HEATER FAN SW “ON/OFF” Displays “FAN (ON)/FAN (OFF)” status as judged from blower fan motor switch signal.
IGNITION SW “ON/OFF” Displays “IGN position (ON)/OFF, ACC position (OFF)” status as judged from ignition switch signal.
AC PRESS SEN “V”Displays “Refrigerant pressure sensor for voltage” status as inputted from refrigerant pressure sen-
sor.
*1ATC-65, "Operational Check"
SHA900E