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What does IAC mean in a car?

1 Answers
MacElliot
07/30/25 8:52am
IAC refers to the Idle Air Control Valve. Here is some extended information about IAC: 1. Introduction to IAC: The Idle Air Control Valve is located in the throttle body. It features a movable needle valve driven by a small motor called a stepper motor. This motor can move precisely, and its measured movement is referred to as 'steps'. In fuel injection systems, the throttle body's throttle gap is preset by the manufacturer. When the throttle is closed, the IAC valve adjusts the idle speed appropriately by altering the airflow through the bypass passage to suit different conditions. 2. Idle State: This refers to a working condition when the engine is running without load. When the accelerator pedal is fully released while the engine is running, the engine enters the idle state. During idle speed adjustment, the RPM should not fluctuate abruptly, as this can cause premature wear to the engine. It is best to have the adjustment performed at an automotive repair facility.
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Can I drive the day after getting my driver's license?

Yes. According to relevant regulations in China, once you obtain your driver's license, you are qualified to drive vehicles within the permitted categories on public roads. However, there is a one-year probationary period for the license. It's important to note that you cannot drive on highways during this probationary period unless the probation period has ended or you have a driver with at least three years of experience guiding you from the passenger seat. Otherwise, you may face fines without point deductions. The following points should be noted during the probationary period: 1. Display a probationary sign on the rear of the vehicle: This alerts other drivers to your novice status, as many new drivers during probation may exhibit behaviors like sudden braking or turning without signaling. 2. Be mindful of the probationary period's point system: For Class C licenses, accumulating 12 points will result in automatic revocation of the license. For Class A and B licenses, accumulating 6 points extends the probation by one year, and 12 points leads to automatic revocation. If the revoked license is not the highest class, the highest class will also be downgraded. 3. Have an experienced driver accompany you for a few drives: This helps you quickly familiarize yourself with potential road situations and necessary precautions. After some initial guidance, you'll be less likely to feel completely unprepared when encountering special driving conditions on your own.
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Where is the chassis number located on GAC Trumpchi vehicles?

GAC Trumpchi's chassis number can be viewed from three locations: on the front bulkhead in the engine compartment; on the left side of the instrument panel; and on the vehicle identification plate located on the central pillar of the vehicle. Additionally, a professional diagnostic tool can be used to read the electronic chassis number and access vehicle status information. Extended information is as follows: 1. Chassis number: Also known as the Vehicle Identification Number (VIN), it is a 17-character alphanumeric code that serves as the car's unique identifier. Each vehicle has its own unique chassis number. The letters and numbers in the chassis number represent the vehicle's production region, manufacturer, production year, model, and other details. 2. Detailed interpretation of the chassis number: Positions 1-3 (WMI): World Manufacturer Identifier. The first digit represents the vehicle's production country or region, while the 2nd and 3rd digits indicate the manufacturer and vehicle type. Positions 4-9 (VDS): Vehicle Descriptor Section. Positions 4-8 represent the vehicle's type, series, body, and engine type, among other details. The 9th digit is the check digit. Positions 10-17 (VIS): Vehicle Indicator Section. The 10th digit indicates the vehicle's production year. The 11th digit is the assembly plant code. Positions 12-17 represent the vehicle's production sequence number.
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What does 1.8tsi mean?

1.8tsi refers to a 1.8-liter twin-charged direct fuel injection engine. Here, 1.8 represents the engine displacement, the first letter T stands for a turbocharger (Turbo-charger), the second letter S represents a supercharger (Super-charger), and the third letter I indicates direct fuel injection technology (Injection). The twin-charged engine is introduced as follows: A twin-charged engine generally refers to an engine that combines both a supercharger and a turbocharger, meaning the engine of a vehicle is equipped with both a turbocharger and a supercharger simultaneously. The purpose is to better address the respective shortcomings of the two technologies and to solve the problems of low-speed torque and high-speed power output.
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Why Does the Steering Wheel Shake When Braking at High Speed?

High-speed braking causing steering wheel shake can be attributed to the following reasons: 1. Uneven brake disc wear: This leads to steering wheel vibration when braking at high speeds. 2. Braking torque imbalance: When the vehicle reaches a certain speed, uneven braking torque causes asynchronous movement between left and right wheels on the same axle, resulting in brake looseness. When this imbalance reaches a certain degree, it creates unequal rolling speeds between left and right wheels, causing lateral wheel oscillation which is then transmitted to the steering wheel.
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Where is the JX4G15C6L engine produced?

JX4G15C6L engine is produced by Jiangling Company in Nanchang County, Nanchang City, Jiangxi Province. Relevant information about the JX4G15C6L engine is introduced as follows: The maximum power of this engine is 103kw, the maximum torque is 225 Nm, the maximum power speed is 4500 to 5200 rpm, and the maximum torque speed is 1500 to 4000 rpm. This engine is equipped with direct injection technology and uses an aluminum alloy cylinder head and block. It is paired with a 6-speed manual transmission or CVT transmission.
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Does the 2021 GLC support wireless CarPlay?

2021 GLC does not support wireless CarPlay. The following is an extended introduction: 1. Configuration: The 21 Mercedes-Benz GLC is popular for its luxurious interior and standard large panoramic sunroof. The sporty leather three-spoke steering wheel integrates multiple functions and gear shifting. Standard features include LED headlights, automatic headlights, all-wheel drive, knee airbags, and head airbags, which are very comprehensive. 2. Body: The car has a length of 4656mm, a width of 1899mm, and a height of 1644mm, allowing us to intuitively feel its size from the side. This car is equipped with 19-inch AMG double 5-spoke wheels, giving it strong sporty capabilities.
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