Browse
For Sale
Antiques CollectiblesApparelBaby Kids ItemsBooks， Movies And MusicElectronicsFree StuffGarden OutdoorHealth BeautyHome GoodsHome Improvement SuppliesMusical InstrumentsOffice SuppliesPet SuppliesSporting GoodsTicketToys GamesTransportationOthers
Jobs
AccountingAdministration & Office SupportAdvertising， Arts & MediaBanking & Financial ServicesCall Center & Customer ServiceCEO & General ManagementCommunity Services & DevelopmentConstructionConsulting & StrategyDesign & ArchitectureEducation & TrainingEngineeringFarming， Animals & ConservationGovernment & DefenseHealthcare & MedicalHospitality & TourismHuman Resources & RecruitmentInformation & Communication TechnologyInsuranceLegalManufacturing， Transport & LogisticsMarketing & CommunicationsMining， Resources & EnergyReal Estate & PropertyRetail & Consumer ProductsSalesScience & TechnologySelf EmploymentSport & RecreationTrades & ServicesOther
Property
BuyRent
Cars
Used CarsNew CarsOthers
Services
BusinessCraftsDesign And WebEventsHome ImprovementLegalLessonsPersonalPetsPhotographyRepair And Technical SupportWellnessWriting， Translation， And TranscriptionOthers
Community
Activities & GroupsArtists & MusiciansClasses & LessonsEventsFriendship & NetworkingLost & FoundRideshareSports TeamsVolunteersTravel & Travel PartnersSkills & Language SwapOther

Which is the external circulation in car AM?

1 Answers
DeJanelle
07/29/25 5:07pm
In car air circulation systems, 'A' stands for automatic control of the internal and external circulation, while 'M' represents the external circulation. When the 'A' button is activated, the air conditioning system automatically determines whether to use internal or external circulation based on the quality of the outside air. When the 'M' button is pressed, the car is in internal circulation mode if the light is on, and in external circulation mode if the light is off. The functions of internal and external circulation in a car are different: 1. External circulation function: It primarily serves to ventilate the car, replacing the internal air when it becomes stale. 2. Internal circulation function: When internal circulation is activated, the air inside the car does not exchange with the outside, circulating instead within a closed environment.
Was this review help?
3
0
Share
More Forum Discussions

How to turn off the eco display on the Levin?

The method to turn off the eco display on the Levin: The Levin 1.6 eco does not have a switch function, it can only be eliminated by stepping on the accelerator or using the S gear; the Toyota Levin 1.8 eco can be turned off in the instrument menu settings. The Levin 1.6L only has eco and sport modes, with the system automatically defaulting to eco mode. The Levin is a compact sedan based on Toyota's MC platform, deeply customized for Chinese consumers. The car's dimensions are 4640 mm in length, 1780 mm in width, and 1455 mm in height, with a wheelbase of 2700 mm. In terms of power, the Levin is equipped with a turbocharged engine with a maximum horsepower of 116 hp, a maximum torque of 185 Nm, and a maximum power of 85 kW.
10
2
Share

When Can I Get the Vehicle License?

Generally, the vehicle license can be obtained once the vehicle registration is completed. In many cases, it can be obtained on the same day. The main functions of the vehicle license are as follows: Proof of Ownership: The "Owner's Name" section on the Motor Vehicle License is not just about the name. The owner registered on the license is the legally recognized owner of the vehicle, with the right to legally use and dispose of the property. In case of traffic accidents or financial disputes, this person is also the legally responsible party. Insurance Claim Document: For insured motor vehicles, if an accident covered by the insurance occurs, the policyholder must present the Motor Vehicle License, and it must be a valid license (i.e., the vehicle has undergone the annual inspection on time), for the insurance company to process the claim. Without a valid license, the insurance company may refuse to compensate, even if the accident occurs within the insurance coverage period.
2
1
Share

Can a Panoramic Sunroof Be Opened?

Different types of panoramic sunroofs have different opening mechanisms. Panoramic sunroofs are categorized into three types: fully enclosed panoramic sunroofs, semi-open panoramic sunroofs, and fully open panoramic sunroofs. Among these, fully enclosed panoramic sunroofs cannot be opened, semi-open panoramic sunroofs can achieve partial opening, and only fully open panoramic sunroofs can be fully opened. Below are the specific differences and opening methods for these three types of sunroofs: Fully Enclosed Panoramic Sunroof: The sunroof is made of a single piece of glass and cannot be opened. This type of sunroof is essentially a large glass roof. Due to the absence of segmented structures, the roof provides extensive light transmission but lacks ventilation functionality. Semi-Open Panoramic Sunroof: This type includes dual-panel panoramic sunroofs and segmented panoramic sunroofs. Above the front seats, there is a standard sunroof, while above the rear seats, there is an additional non-opening sunroof. This design allows more light into the cabin, creating a panoramic-like effect. Fully Open Panoramic Sunroof: This sunroof combines the large light-admitting area of a panoramic sunroof with the functionality of a standard sunroof. However, due to structural constraints, its area is typically smaller than that of segmented sunroofs, usually not exceeding half of the roof area. The advantage of a one-piece sunroof is the absence of a middle partition, featuring both tilt and slide functions. To open the sunroof, first power on the vehicle, then locate the sunroof switch button on the roof. Rotate the switch button to open the sunroof.
4
4
Share

When reversing and the rear of the car drifts to the right, which way should the steering wheel be turned?

When reversing and the rear of the car drifts to the right, turn the steering wheel to the right. When reversing into a parking space, it is important to maintain a steady speed and turn the steering wheel quickly. Specific requirements to note are as follows: Maintain a steady speed: The clutch must be controlled well to keep the vehicle speed steady, avoiding sudden acceleration or deceleration, as this can make reversing into the parking space more difficult. During regular practice, focus on driving straight forward and reversing to improve clutch control. Turn the steering wheel quickly: When reversing into a parking space, turn the steering wheel swiftly when the vehicle reaches the designated point. Turning too late or too slowly may result in failure. During practice, emphasize the ability to recognize reference points and turn the steering wheel promptly, achieving coordination between vision and hand movements.
4
0
Share

What is the composition of the valve train?

1. The valve group mainly consists of valves, (valve guides, valve oil seals), valve springs, valve spring seats, valve locks, etc. 2. The valve drive group mainly consists of camshafts, valve lifters, valve rocker arms, rocker arm shafts, camshaft timing gears, valve tappets, valve push rods, etc. The engine valve train (internal combustion engine valve train) operates according to the working cycle and ignition sequence requirements of each cylinder in the engine, timing the opening and closing of the intake and exhaust valves of each cylinder to allow fresh combustible mixture.
10
1
Share

How to Deal with Waterlogged Car Carpets?

There are several methods to handle waterlogged carpets in the car cabin: Open the windows: Open the windows to allow the carpet to air dry naturally. Alternatively, use a dryer if necessary to speed up the drying process. Remove the carpet: Take the car to a repair shop to have the carpet removed. Then, dry the carpet in the sun. Prepare a high-power vacuum cleaner, mix detergent with water, scrub the carpet thoroughly with a brush, and then vacuum it clean. Place activated charcoal on the carpet and let it dry in the sun for 2-3 hours. Special cleaning agents: Use commercially available special cleaning agents designed for this purpose. These agents do not require soaking the carpet in water and can be used for "dry cleaning," generally yielding good results. Cleaning: Gently wipe off dirt from the carpet with a sponge, then clean it with a foam cleaner.
18
0
Share
Trending Ranking
What maintenance does a car need after six years?
Where is the cabin air filter of the Soueast DX7 located?
How to Handle the Steering Wheel Properly?
4
How to reset the maintenance light on Borgward BX5?
5
What is the tire pressure for the Arrizo 5?
6
Do You Need to Press the Brake When an Automatic Transmission Car Stalls?
7
What causes the heavy steering wheel of the Arrizo GX?
8
What size tires does the Haval F7 use?
9
Is ETC mandatory on highways now?
10
What are the signs of poor tire grip?
More Forum Discussions

How to Replace the Battery in a Geely Key?

16
4
1

Do You Need to Watch the Entire Car Maintenance Process?

13
3
1

What does 5w40 engine oil mean?

2
1
1

Can I Renew My Driver's License If My Motorcycle Registration Is Not Cancelled?

17
0
1
About Us
Terms of Use
Privacy Policy
Help
Contact Us
FAQ
Cookie
Cookie Policy
Cookie Settings
© 2025 Servanan International Pte. Ltd.