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:

    Diagnosis system (driver seat C/U)
    Diagnosis Description The auto drive positioner system can be checked and diagnosed for component operation with CONSULT. DIAGNOSTIC MODE Diagnostic mode [AUTO DRIVE POS.] Description WORK SUPPORT Changes the setting of each function SELF DIAGNOSTIC RESULT Perf ...

    U1216 AV control unit
    Description Replace the AV control unit if this DTC is displayed. Part name  Description  AV CONTROL UNIT  It is the master unit of the MULTI AV system and it is connected to each control unit by means of communication. It operates each syste ...

    Diagnosis system (HVAC)
    CONSULT Function CONSULT can display each diagnosis item using the diagnosis test modes as shown. CONSULT application items SELF DIAGNOSTIC RESULT Display Item List *: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2026 Copyright www.nimainfo.com
    0.0072