Nissan Maxima Service and Repair Manual: Air mix door control system

System Diagram

Nissan Maxima. System Diagram

System Description

The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined value by the temperature setting, ambient temperature, intake temperature and amount of sunload.

SYSTEM OPERATION

  • The A/C auto amp. receives data from each of the sensors.
  • The A/C auto amp. sends air mix door, the mode door and the intake door opening angle data to the air mix door motor LCU(s), the mode door motor LCU and the intake door motor LCU.
  • The air mix door motor(s), the mode door motor and the intake door motor read their respective signals according to the address signal. Opening angle indication signals received from the A/C auto amp. and each of the motor position sensors, are compared by the LCUs in each door motor with the existing decision and opening angles.
  • Next, HOT/COLD, DEF/VENT or FRE/REC operation is selected. The newly selected data is returned to the A/C auto amp.

Door Motor Circuit

Nissan Maxima. Door Motor Circuit

Air Mix Door Control Specification

Nissan Maxima. Air Mix Door Control Specification

When ignition switch is ON, the A/C auto amp. continuously and automatically controls temperatures, regardless of air conditioner operational condition. When setting a target temperature with the temperature control switch, the A/C auto amp. corrects the set temperature and decides a target air mix door opening angle. The A/C auto amp. controls the air mix door, according to the target air mix door opening angle and the current air mix door opening angle, keeping an optimum air mix door opening angle. When the temperature is set at 18C (60F), air mix door is set on full-cold, and when the temperature is set at 32C (90F), it is set to full-hot.

    Mode door control system
    System Diagram System Description The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature and amount of sunload. ...

    Intake door control system
    System Diagram System Description The intake doors are automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature, amount of sunload ...

    Other materials:

    Map lights
    To turn the map lights on, push the switches. To turn them off, push the switches again. CAUTION Do not use for extended periods of time with the engine stopped. This could result in a discharged battery. Personal lights To turn the rear personal lights on, push the switch. To turn the ...

    Rear view camera
    Removal and Installation REMOVAL Remove the license plate finisher. Refer to EXL-166, "Removal and Installation". Remove trunk lid finisher. Refer to INT-36, "Exploded View". Disconnect the rear view camera connector (B), press the rear view camera tab (A) and remove the rear view c ...

    Xenon headlamp
    Description OPERATION Refer to EXL-10, "Component Description". PRECAUTIONS FOR TROUBLE DIAGNOSIS Installation or removal of the connector must be done with the lighting switch OFF. When the lamp is illuminated (when the lighting switch is ON), do not touch the harness, HID control ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2025 Copyright www.nimainfo.com
    0.0059