Nissan Maxima Service and Repair Manual: Mode door control system

System Diagram

Nissan Maxima. 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.

SYSTEM OPERATION

  • The A/C auto amp. receives data from each of the sensors.
  • The A/C auto amp. sends the 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

Mode Door Control Specification

Nissan Maxima. Mode Door Control Specification

Mode position can be selected manually by pressing the MODE switch or the DEF switch on the A/C switch assembly. Pressing the AUTO switch allows automatic control by the A/C auto amp. During the automatic control of a mode position, a mode door position (VENT, B/L, FOOT, or D/F) is selected based on a target air mix door opening angle and the sunload sensor, calculated by the A/C auto amp. In addition, the D/F is selected to prevent windshield fogging only when ambient temperature is extremely low.

    Automatic air conditioner system
    System Diagram CONTROL SYSTEM The control system consists of input sensors, switches, the A/C auto amp. (microcomputer) and outputs. The relationship of these components is as shown in the figure ...

    Air mix door control system
    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 tem ...

    Other materials:

    Rear combination lamp
    Exploded View   Slide clip Grommets Rear combination lamp Removal and Installation REAR COMBINATION LAMP Removal Remove the trunk side finisher. Refer to INT-36, "Removal and Installation". Remove the rear combination lamp nuts. Pull the rear combination lamp toward th ...

    Subwoofer
    Description The audio unit sends audio signals to the subwoofer amp. The subwoofer amp. amplifies the audio signals before sending them to the subwoofers using the audio signal circuits. Diagnosis Procedure 1.CONNECTOR CHECK Check the audio unit, subwoofer amp. and subwoofer connectors for t ...

    Harness
    Harness Layout HOW TO READ HARNESS LAYOUT The following Harness Layouts use a map style grid to help locate connectors on the drawings: Main Harness, Console Sub-harness and Console Switch Subharness Engine Room Harness and Front End Module Harness Engine Room Harness (Passenger Comp ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2026 Copyright www.nimainfo.com
    0.0062