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Why is the car's warm air not hot?

Why is the car's warm air not hot?

Car air conditioner maintenance and inspection 2020-01-18 15:34:07


Why is the car heater not hot? The reason why the car heater is not hot: 1. Possible problems in the cooling system 1. The thermostat is always open or the thermostat is turned on too early, causing the cooling system to prematurely cycle, The outside temperature is very low, especially when the car is running, the cold wind quickly cools the antifreeze, and the engine water temperature is not ...

Precautions for Airbag System Maintenance Diagnosis

Precautions for Airbag System Maintenance Diagnosis

Airbag repair2019-12-06 23:17:06


If the system is not repaired and tested in the correct order, it may cause the airbag system to open unexpectedly during maintenance and cause serious accidents. In addition, if the operation is wrong, it may not work when the airbag system needs protection, and there are instructions on the outer surface of the airbag parts ...

Why does the airbag light come on? How to do

Why does the airbag light come on? How to do

Auto electrical repair2019-11-20 01:23:49


The airbag light is on. There are still many faults in car maintenance. The fault light is on. Of course, there is a problem with the airbag system, and the causes of the failure are not many. The reasons for the airbag light and the solutions are briefly introduced below. Airbag system ...

Inspection of exhaust gas recirculation valve (EGR valve)

Inspection of exhaust gas recirculation valve (EGR valve)

Auto electrical repair2019-10-29 23:38:01


During the inspection of the exhaust gas recirculation valve (EGR valve), start the engine, let it run at idle speed, remove the vacuum hose of the exhaust gas recirculation valve, and connect the manual vacuum pump. Then evacuate and apply vacuum directly to the diaphragm chamber of the exhaust gas recirculation valve. At this time, if the engine idling is unstable ...

Hot wire air flow meter fault detection

Hot wire air flow meter fault detection

Car sensors2019-10-29 11:28:14


The measurement method of the hot-wire air flow meter is mainly based on the air quality, and is generally not affected by the intake air temperature. In addition, since it needs self-cleaning during startup and shutdown, the power supply voltage is generally 12V, the signal reference voltage is 5V, and the output signal voltage is 0.3 to 4.5V. by...

Kalman vortex air flow meter troubleshooting method

Kalman vortex air flow meter troubleshooting method

Automotive sensors2019-10-29 11:25:36


The Kalman vortex air flow meter transmits the signal processed by the upper integrated circuit of the sensor to the computer. The frequency signal is usually output, so the measured output voltage is generally 2.2 to 2.8V. When the air flow changes, the voltage is always the same, and the output pulse frequency changes, so ...

Vane air flow meter troubleshooting

Vane air flow meter troubleshooting

Automotive sensors2019-10-29 10:36:37


1. The hose connecting the air flow meter and the throttle body is not sealed. Maintenance The vane air flow meter integrates the functions of the fuel pump switch, air temperature sensor, and CO adjustment, so the connection between the air flow meter and the throttle body is well sealed with a hose. Is necessary to ensure the correct calculation of air intake ...

How to disassemble a car compressor

How to disassemble a car compressor

Automotive air conditioning repair and testing2019-10-26 12:29:53


When repairing the air conditioner of the car, sometimes we have to remove the air conditioner compressor from the car, then the question comes, how should we remove the compressor? Because the installation position of each brand model and the car compressor is different Yes, the following editor will briefly introduce the automotive air-conditioning compressor ...

How to repair automobile compressor leakage

How to repair automobile compressor leaking fluorine

Automotive air conditioning repair and testing2019-10-26 12:22:07


How to repair the fluorine leak of the car compressor is actually very simple. Whether the compressor is leaking fluorine can be checked on the workbench. The following is the specific method: (1) Check whether the compressor's internal leak is in the compressor suction and exhaust maintenance The valve is fitted with a manifold pressure gauge. Close the high and low pressure manual valve and turn the pressure by hand ...

How to judge the quality of a car compressor

How to judge the quality of a car compressor

Automotive air conditioning repair and testing2019-10-26 12:11:33


How to judge the quality of a car compressor I believe many friends do not know how to judge, the following editor will introduce to you how to diagnose the quality of a car compressor when you are in the car. How to judge the quality of a car compressor is as follows: start the engine and keep the speed at ...

Maintenance of common faults of automotive air-conditioning compressors

Maintenance of common faults of automotive air-conditioning compressors

Car air conditioning repair and testing2019-10-26 11:54:23


Most moving parts of automotive air conditioning systems are on the compressor, so the compressor has the largest amount of overhaul. Common compressor failures are generally as follows. (1) The air conditioner compressor is stuck and cannot be operated. The cause of the jam is generally poor lubrication or no lubrication. If you find that the refrigerating machine oil is due to the leakage of refrigerant ...

Reading the ignition coil circuit diagram

Reading the ignition coil circuit diagram

Automotive circuit (circuit) repair2019-10-24 17:58:20


The ignition system of the Polaris car adopts a two-cylinder ignition ignition system. The two cylinders share an ignition coil, and the high-voltage electricity of the ignition coil is sent to the spark plugs of the two cylinders at the same time. As shown in the figure below, the power supply of the ignition coil N152 is the 12V storage provided by the SC2425A fuse through the address code 40 ...

G39, G130 oxygen sensor circuit diagram reading

G39, G130 oxygen sensor circuit diagram reading

Automotive sensors2019-10-24 17:57:12


The oxygen sensor circuit diagram is shown in the following figure. Volkswagen Bora is equipped with two front and rear oxygen sensors, G39 and G130. Among them, G39 is a front oxygen sensor, which is used to detect the oxygen content in the exhaust gas and control the injection correction. The G130 is a rear oxygen sensor, which can detect ...