The triple pressure switch is mounted on a dry bottle and consists of a high voltage switch, a low voltage switch and a medium voltage switch. The low voltage switch and the high voltage switch are connected in series and form a loop through terminal 1 and terminal 2. When the A/C switch is ON, the current direction of the switch is: A/CECU (air conditioning microcomputer) A23 foot → triple pressure Switch 1 foot → triple pressure switch 2 foot → PCM C13 foot, to the PCM to provide air conditioning to join the high signal. When the medium voltage switch is turned on, it gives a high level signal to the PCM to enable the electronic fan to run at a high speed. Its current direction is: A/CECU's A23 pin → Triple pressure switch No. 4 pin → Triple pressure switch No. 3 pin → PCM The B22 pin, PCM after receiving this signal to its A17 foot iron, control the combination of high speed relay cooling fan and cooling fan high-speed relay, so that the condenser fan and cooling fan high-speed operation, the condenser cooling forced cooling (6). The operating conditions of the triple pressure switch are shown in Fig. 4. The light sensor is installed in the middle of the front windshield defrost opening in the center of the instrument panel to detect the light level, and sends this signal to the A/C ECU for setting the temperature correction so that the air temperature and the air volume blown by the air conditioner are always close to Set the temperature value. The light sensor is actually a photodiode, which can change its output voltage according to the change of illumination. The outside temperature sensor, also called the ambient temperature sensor, is installed in front of the front bumper rear condenser to detect the outside ambient temperature. After receiving this signal, A/CECU is also used to set the temperature correction. The sensor is actually a thermistor with negative characteristics. Its output characteristics are shown in Figure 5. The remote ship auto air conditioning self-diagnosis remote ship auto air conditioning with self-diagnosis function, when the system fails, you can from the air conditioning control panel temperature display to retrieve the fault, to provide help for maintenance. The self-diagnosis flow is shown as 12.
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The remote control system of the remote-controlled passenger car automatic air-conditioning input and output system is shown in Figure 1. The line connection is shown in Figure 2. The principle is shown in Figure 3. The position of the component is shown in Figure 4. The connection terminal is shown in Figure 5. The meaning of the terminal is as shown in Figure 1. Show. The principle of the automatic air conditioning cooling system is shown in Fig. 6. The control panel is shown in Fig. 7. The switch functions of the components on the control panel are shown in Fig. 2. Automatic air conditioning control function is shown as 3.
November 12, 2023