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Anonymous users2024-02-061. Introduction to air flow meter.
The role of the air flow meter.
The air flow meter measures the amount of fresh air entering the engine intake manifold and the intake air temperature, and the ECU uses this information to make injection corrections, smoke limits, and EGR opening control.
2.Installation location.
The sensor is mounted on the engine intake duct and at the rear end of the air filter.
3.How it works.
The principle of an air flow meter.
The air flow sensor is to integrate some electronic components on a ceramic substrate, when the engine is working normally, the diaphragm is first heated, and the fresh air flows through the sensor will take away part of the heat, at this time the ECU will control the Wheatstone bridge on the diaphragm to supplement the diaphragm, which will cause a change in the electrical signal, when the signal is transmitted to the ECU, the ECU will calculate the air intake according to this change.
The principle of the air temperature sensor.
The inlet air temperature sensor is a negative temperature coefficient resistor, when the inlet air temperature changes, the resistance value of the resistor will change, causing a change in the signal voltage at the ECU terminal, and the ECU calculates the inlet air temperature based on this change.
Determination of the direction of the airflow.
There is a same temperature resistance at both ends of the hot film of the air flow meter, and when the air flow flows through the hot film, it will take away part of the heat, so the temperature at the front end of the hot film is lower than the temperature at the rear end, and the ECU judges the direction of the air flow according to this signal!
4.Wiring diagram of an air flow meter.
5.Control policy.
The ECU will monitor the working condition of the air flow meter at all times, and when the ECU judges that the air flow meter is faulty, it will take corresponding control, as follows.
The engine mil light is lit, the EGR system is withdrawn from work, and the exhaust gases will no longer participate in the system work;
The engine speed will be limited to a certain speed, and the power will be limited;
When the air flow meter fails, the engine start is not affected and can be started normally;
Second, the detection of air flow meter:
Fault codes related to air flow meters.
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Anonymous users2024-02-05Hello! The cost of the air flow meter in the 4S shop is more than 200 man-hours, and the parts cost is about 470.
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Anonymous users2024-02-04Hello on the air intake manifold, or air filter above [car questions, ask the car master. 4S shop professional technician, 10 minutes to solve. 】
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Anonymous users2024-02-03Hello! In the intake manifold management hope mine is helpful to you [car questions, ask the car master. 4S shop professional technician, 10 minutes to solve. 】
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Anonymous users2024-02-02Summary. Hello dear<>
The answer you are looking for: The steps to disassemble the Mercedes-Benz C200 air flow meter are as follows:1
Open the hood and locate the location of the air flow meter. Usually it is located near the air filter box. 2.
Use a wrench or torque wrench to remove the wire plug of the air flow meter. 3.Use a screwdriver or wrench to remove the air flow meter set screws.
Be careful not to damage the threads. 4.Gently pull the air flow meter out of the intake tube.
If it's hard to remove, you can use some lube to make it easier to remove. 5.Remove any dirt or sediment from the air intake pipe and air flow meter.
Note: Before disassembling and cleaning the air flow meter, it is recommended to pull out the negative wire of the battery to avoid accidentally triggering the circuit.
How to disassemble the Mercedes-Benz C200 air flow meter.
Selling in the mountains, hello Bi Weiqing <>
The answer you are looking for: The steps to disassemble the Mercedes-Benz C200 air flow meter are as follows:1
Open the hood and locate the location of the air flow meter. Usually it is located near the air filter box. 2.
Use a wrench or torque wrench to remove the wire plug of the air flow meter. 3.Use a screwdriver or wrench to remove the air flow meter set screws.
Be careful not to damage the threads. 4.Gently pull the air flow meter out of the intake tube.
If it's hard to remove, you can use some lube to make it easier to remove. 5.Remove any dirt or sediment from the air intake pipe and air flow meter.
Note: Before disassembling and cleaning the air flow meter, it is recommended to pull out the negative pole grip wire of the battery to avoid accidentally triggering the circuit.
The pro-stool burns the pro-<>
Extensions you're looking for: The Mercedes-Benz C200's air flow meter is located vertically above the intake pipe, and the air flow meter needs to be removed by disassembling the air intake pipe and intake duct. It is important to note that care needs to be taken to disassemble the air flow meter to avoid damage to the parts or other problems.
It is recommended that if you are not familiar with car maintenance operations, it is best to hand it over to professional car maintenance personnel.
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Anonymous users2024-02-01I'm just like you, I'm a C300, I've been broken lately, I'm annoyed, so I've been driving a Honda, Mercedes, it's so painful, annoying.
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Anonymous users2024-01-31The engine light is on and the idle speed is unstable.
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Anonymous users2024-01-30One of the hallmarks of modern automotive technology is the increasing number of components that are electronically controlled. For example, electronically controlled fuel injection, exhaust emissions, anti-lock braking systems, automatic air conditioning, headlight brightness control, automatic driver's seat adjustment, steering control, electronically controlled suspension, and so on. The work of electronic automatic control depends on the information of the sensors.
According to statistics, at the moment in general.
Data from the 09 Mercedes-Benz E300 idle air flow meter.
Anonymity. From the phone knows.
Category: Buying and maintaining a car.
This is a difficult problem to be solved.
Your quilt will receive a system reward of 20 (...)
It can be called the upper sealing ring of the air flow meter, which needs to be replaced, and may enter the ash if not replaced, 100-200 yuan, if there is no evidence to prove that the late return is made by the 4S shop, pay for it yourself, the first can be installed, the bolts can be tightened, and the second is that the circumference of the tire must be the same, or it will be bumpy if you don't walk, if the circumference is the same, there should be no problem, and the speed is slower when you run, after all, it is not a matching thing.
The time varies from 25 to 30 seconds. If you want to turn it off immediately, use the middle button of the armrest to adjust it! The buttons next to it help you adjust the lighting settings! It is best to have a professional staff in the 4S shop to operate!
Induction doesn't respond? You didn't take the car keys.........
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