2007 INFINITI M35 Factory Service Manual

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INFINITI M35 2007 Factory Service Manual ATC-30
AIR CONDITIONER CONTROL
Revision: 2007 April2007 M35/M45
OPERATION
The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp.
sends mode door, air mix

ATC-30
AIR CONDITIONER CONTROL
Revision: 2007 April2007 M35/M45
OPERATION
The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp.
sends mode door, air mix door, upper ventilator door and intake door opening angle data to the mode door
motor LCU, air mix door motor LCU, upper ventilator door motor LCU and intake door motor LCU.
The mode door motor, air mix door motors, upper ventilator door motor and intake door motor read their
respective signals according to the address signal. Opening angle indication signals received from the unified
meter and A/C amp. and each of the motor position sensors is compared by the LCUs in each door motor with
the existing decision and opening angles. Subsequently, HOT/COLD, DEF/VENT, OPEN/SHUT and FRE/REC
operation is selected. The new selection data is returned to the unified meter and A/C amp.
TRANSMISSION DATA AND TRANSMISSION ORDER
Unified meter and A/C amp. data is transmitted consecutively to each of the door motors following the form
shown in figure below.
Start:
Initial compulsory signal is sent to each of the door motors.
Address:
Data sent from the unified meter and A/C amp. are selected according to data-based decisions made by the
mode door motor, air mix door motor, upper ventilator door motor and intake door motor.
If the addresses are identical, the opening angle data and error check signals are received by the door motor
LCUs. The LCUs then make the appropriate error decision. If the opening angle data have no error, door con-
trol begins.
If an error exists, the received data are rejected and corrected data received. Finally, door control is based
upon the corrected opening angle data.
Opening angle:
Data that shows the indicated door opening angle of each door motor.
Error Check:
In this procedure, transmitted and received data is checked for errors. Error data are then compiled. The error
check prevents corrupted data from being used by the mode door motor, the air mix door motor, the upper
ventilator door motor and the intake door motor. Error data can be related to the following symptoms.
Malfunction of electrical frequency
Poor electrical connections
Signal leakage from transmission lines
Signal level fluctuation
RJIA4018E

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INFINITI M35 2007 Factory Service Manual AIR CONDITIONER CONTROL
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Stop signal:
At the end of each transmission, a stop operation, in-operation, or internal malfunction messag

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INFINITI M35 2007 Factory Service Manual ATC-32
AIR CONDITIONER CONTROL
Revision: 2007 April2007 M35/M45
MAGNET CLUTCH CONTROL
When A/C switch, AUTO switch or DEF switch is pressed, unified meter and A/C amp. transmits compressor
ON signal t

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INFINITI M35 2007 Factory Service Manual AIR CONDITIONER CONTROL
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Description of Control SystemNJS000G6
The control system consists of input sensors, switches, the unified me

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INFINITI M35 2007 Factory Service Manual 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 t

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INFINITI M35 2007 Factory Service Manual 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

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

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INFINITI M35 2007 Factory Service Manual 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 temp

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INFINITI M35 2007 Factory Service Manual AIR CONDITIONER CONTROL
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Discharge Air FlowNJS000GA
RJIA4024E

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