Santana air flow meter | Santana 3000, unplugged air flow meter has normal idle speed, plugged in has unstable idle speed | Jiuquan ultrasonic flowmeter manufacturer

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How to check if the air flow sensor of Santana 2000Gsi sedan is in good condition? Using the V.A.G1552 detector to test the air flow meter of the Santana 2000AJR engine as an example, read the data of the air flow meter in the megaimpulse block. The method is as follows:
(1) Let the engine idle;
(2) Enter the function code 08 of "Reading and Measuring Data Block of Yuezu Scattered Fighter", select the display group 02 of Juekai, and the display screen will show it; 3) Zone 4 displays air quality, with a standard value of 2.0-4.0 g/s; If the displayed value is not within the standard range, the air flow meter and power supply voltage should be checked. Santana 2000AJR 00553 line to ground open circuit or short circuit

2. Santana air flow meter malfunction

Santana air flow meter malfunction can cause various malfunctions, mainly including: engine malfunction light on: ECU detects abnormal signal of air flow meter (MAF), such as fault codes P0100-P0103, triggering warning light. Power performance issues: Firstly, insufficient power or slow acceleration may cause the ECU to be unable to obtain accurate intake air flow, which may default to a conservative fuel injection strategy, resulting in a decrease in power; Secondly, when the speed exceeds 120 kilometers per hour, the signal output of the air flow meter may be abnormal, affecting power. Rough idling and abnormal starting: Unstable idling or stalling, imbalanced air-fuel ratio (too rich or too lean mixture), can cause idle shaking, speed fluctuations, and even stalling; Difficulty in starting or abnormal operation during cold start. During cold start, the ECU relies on the MAF signal to correct the fuel injection amount. Sensor failure may

result in extended start time or cold car shaking. Fuel consumption and emissions issues: Abnormal increase in fuel consumption, incorrect calculation of fuel injection quantity, such as misjudging insufficient intake air, ECU will inject excessive fuel, significantly deteriorating fuel economy; Excessive exhaust emissions and insufficient combustion can lead to an increase in CO and HC emissions, which may be accompanied by black smoke (too rich mixture) or white smoke (too lean mixture) from the exhaust pipe. Other abnormal phenomena: backfire of intake pipe; The engine experiences intermittent stalling and jerking, but the idle and acceleration conditions may be normal; In severe cases, it may also cause severe engine wear, insufficient cylinder compression force, and affect the normal operation of the engine.

3. What are the meanings of the pins of the hot film air flow meter used in Santana engines?

The definition lies in the difference..

1、 The pin definitions of different air flow meters are different. Taking Santara 2000 as an example, Boschs air flow meter has a total of 5 pins. Among them, pin 1 is for temperature, pin 2 is for 12V power supply voltage of the flow meter, pin 3 is for ground, pin 4 is for 5V input, and pin 5 is for flow meter output voltage.

2、 Similarly, the output pins of other Bosch air flow sensors and 5V are not connected by the same wire, and the same goes for Japanese air sensors, where the signal output and voltage hidden input are not connected by the same wire.

4. Santana 3000, unplug the air flow meter and idle normally, plug it in and idle unstably

Santana 3000, unplug the air flow meter and idle normally, plug in the unstable air flow

Santana air flow meter | Santana 3000, unplugged air flow meter has normal idle speed, plugged in has unstable idle speed

2. Santana air flow meter malfunction

3. What are the meanings of the pins of the hot film air flow meter used in Santana engines?

4. Santana 3000, unplug the air flow meter and idle normally, plug it in and idle unstably

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