Purpose
The expansion valve atomizes liquid refrigerant to facilitate cooling of the evaporator.
Function
The expansion valve reduces the pressure of liquid refrigerant rapidly to facilitate vaporization of the atomized refrigerant at the evaporator, and adjusts the refrigerant amount sent into the evaporator.
Construction
The expansion valve consists of the following parts:
Diaphragm
Temperature sensor
Shaft
Expansion valve body
Ball valve
Spring
Operation
Adjustment of the refrigerant amount supplied to the evaporator is performed by the ball valve opening angle in the expansion valve.
The opening angle adjustment is performed according to the balance of the following forces:
Refrigerant pressure (Pd) in diaphragm
Refrigerant gas pressure (PI) of evaporator under diaphragm
Spring force (Fs) pushing up ball valve
If the refrigerant gas temperature from the evaporator increases, the expansion valve increases the amount of refrigerant according to the following operations:
The temperature of the temperature sensor tightly sealed against the diaphragm increases.
The refrigerant in the diaphragm warms and the Pd increases.
If this Pd increases more than PI + Fs, the diaphragm is pressed down.
The shaft installed to the temperature sensor end presses down the ball valve.
The amount of refrigerant is increased.
If the refrigerant gas temperature from the evaporator decreases, the expansion valve decreases the amount of refrigerant flow according to the following operation:
The temperature of the temperature sensor tightly sealed against the diaphragm decreases.
The refrigerant temperature in the diaphragm decreases and the Pd decreases.
The Pd decreases less than PI + Fs.
The ball valve installed to the temperature sensor end is pressed up.
The amount of refrigerant is decreased.
Fail-safe
Function not equipped.
Keyless Beeper
Purpose, Function
Notifies the user that the lock/unlock operation of the advanced keyless
entry system is completed, and warns if the system is operated incorrectly.
Construction, Operation
Installed inside the cowl grille.
The keyless beeper operates based on the LF ...
Audio Pilot®2 Microphone Removal/Installation
NOTE:
AudioPilot®2 is a registered trademark of Bose® Corporation.
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Driver-side front scuff plate.
b. Driver-side front side trim.
c. Switch panel.
d. Decoration panel.
e. Shift lever knob (MTX). ...
Air Mix Actuator [Full Auto Air Conditioner]
Purpose
The air mix actuator moves the air mix door in the A/C unit to adjust the
temperature of the air blown from the air vent.
Function
Door open/close function
The air mix actuator drives the motor based on the signals from the climate
control unit and moves the air mi ...