What Causes the Abnormal Noise When the Car Air Conditioner is Turned On?

What Causes Water Leakage from the Right A-Pillar of a Car?

Water leakage from the right A-pillar of a car can be caused by clogged sunroof drainage holes, poor windshield sealing, or inadequate vehicle sealing. Clogged Sunroof Drainage Holes: If the drainage holes of the car's sunroof are clogged, rainwater that falls on the car cannot be drained in time, causing the water to flow along the interface of the conduit into the interior of the A-pillar. The solution is to unclog the blocked drainage holes. Poor Windshield Sealing: After replacing the windshield, if the adhesive is unevenly applied, the car's sealing performance will decrease, allowing rainwater to seep into the car through gaps. If the windshield has not been replaced, it is likely that the sealing strip has aged, leading to leakage. The solution is to replace the windshield and the sealing strip. Inadequate Vehicle Sealing: This can be due to aging window sealing strips or poor sealing of the roof rack mounting holes. Over time, the window sealing strips can harden and age, reducing the window's sealing performance. Additionally, if the mounting holes for the roof rack are not properly sealed during installation, water leakage can occur. The solution is to replace the window sealing strips and improve the vehicle's sealing.

14

3

Share

Will there be any issues if a family car's annual inspection is overdue by a few months?

If the annual inspection is overdue by one month, penalties will be imposed, including a 3-point deduction. Exterior Inspection: During the exterior inspection, the staff will present the Motor Vehicle Inspection Record Form and the Motor Vehicle Safety Technical Inspection Certificate. They will then check the vehicle's frame number, engine number, and other data. The inspection also includes verifying the vehicle's body color, the presence of a triangular warning sign, and whether fire extinguishers and other onboard tools are complete. If all checks pass, the staff will sign the record form. The signed form will then be handed to the owner, who will be notified to proceed with payment. Next, the owner must submit their personal documents to the staff, who will enter the inspection information into the system. The owner will then wait for the next inspection item. On-Road Inspection: The on-road inspection primarily tests the vehicle's emissions, lights, brakes, etc. The owner only needs to queue and drive the vehicle to the inspection entrance. The staff will collect the forms in order, and the owner can wait at the final photo station. As long as the vehicle has no faults or unauthorized modifications, these items will pass. Owners of vehicles that pass the inspection only need to hold the signed form, place the fire extinguisher and triangular warning sign at the rear, and slightly raise the tail of the sunroof before waiting for the staff to take photos.

4

Share

Reasons for the ABS Warning Light Illuminating in the Teana

ABS warning light can illuminate in various states, each with different causes and solutions as detailed below: State 1: ABS warning light remains constantly illuminated (most common). Cause 1: The ABS wheel speed sensor's sensing area is covered by mud, sludge, or other contaminants, affecting its ability to detect the corresponding wheel speed signal. This prevents the ABS computer from determining the vehicle speed and wheel slip rate, thus failing to issue appropriate commands to regulate braking. Solution: Clean the dirt from the wheel speed sensor and adjust the gap between the sensor and the signal ring to restore normal function. Cause 2: Poor signal transmission due to loose system wiring connections or faulty ABS relay contacts. Solution: Inspect wiring connections and reconnect any loose parts. State 2: ABS warning light intermittently illuminates but turns off during acceleration. Cause: When multiple vehicle electrical devices are in use, battery voltage drops below 10.5V. As engine speed increases, voltage rises, causing the ABS light to turn off. This may also occur due to insufficient power supply voltage to the ABS system, such as poor terminal contact or grounding issues. Solution: Check battery specific gravity; inspect the charging system; examine the power supply (e.g., voltage relay or poor power contact). State 3: ABS warning light remains illuminated after engine start until engine IGFF turns off. Cause: Poor grounding connection of the ABS hydraulic valve body; faulty wiring connector of the ABS hydraulic valve body; ABS computer malfunction. Solution: Loosen and retighten the grounding screw of the hydraulic valve body, cleaning the contact surface if necessary; check for enlarged connector gaps; replace the ABS or ABS/ASR computer. State 4: ABS warning light illuminates during high-speed driving. Cause: During high-speed driving, the ABS computer detects a significant discrepancy between rear and front wheel speed signals; incorrect tire or wheel rim specifications. Solution: Refer to the vehicle's tire and wheel rim specifications, as indicated on the label near the fuel tank cap. State 5: ABS warning light intermittently illuminates. Cause: Improper adjustment of the brake light switch; poor internal contact of the brake light. Solution: With the engine running, press the brake pedal and use a finger to push the brake switch linkage fully downward, then release the brake pedal to complete self-positioning; replace the brake light switch if necessary. If the ABS warning light is illuminated, it is advisable to avoid continued driving. An illuminated ABS light indicates a malfunction in the vehicle's anti-lock braking system. During emergency braking, if the wheels lock up, the vehicle may skid uncontrollably, preventing the driver from slowing down or adjusting the vehicle's trajectory, posing significant safety risks.

9

5

Share

What does the BMW ABS warning light indicate?

When the ABS light is displayed on a vehicle, it indicates a malfunction in the Anti-lock Braking System. During emergency braking, if the wheels lock up, the vehicle may skid uncontrollably, preventing the driver from slowing down or adjusting the vehicle's trajectory, which poses significant safety risks. There are several scenarios in which the ABS light may illuminate, each with different causes and solutions, as detailed below: Scenario 1: ABS warning light remains constantly illuminated (most common). Cause 1: The ABS speed sensor's sensing area is covered by dirt, mud, or other contaminants, affecting its ability to detect the vehicle's speed signal. This prevents the ABS control unit from determining the speed and calculating the wheel slip rate, thus failing to issue appropriate commands to regulate braking. Solution: Clean the dirt from the speed sensor and adjust the gap between the sensor and the signal ring to restore normal function. Cause 2: Poor signal transmission due to loose system wiring connections or faulty ABS relay contacts. Solution: Inspect wiring connections and reconnect any loose parts. Scenario 2: ABS warning light intermittently illuminates but turns off during acceleration. Cause: When multiple electrical components are in use, the battery voltage may drop below 10.5V. As engine speed increases, voltage rises, causing the ABS light to turn off. This can also occur if the ABS system's power supply voltage is too low due to poor terminal contact or grounding issues. Solution: Check the battery's specific gravity, inspect the charging system, and examine the power supply (e.g., voltage relay or poor power contact). Scenario 3: ABS warning light remains illuminated after engine start-up until the engine is turned off. Cause: Poor grounding of the ABS hydraulic valve body, faulty wiring connections in the hydraulic valve body, or ABS control unit malfunction. Solution: Loosen and then retighten the grounding screw of the hydraulic valve body, cleaning the contact surface if necessary. Check for enlarged gaps in connectors. Replace the ABS or ABS/ASR control unit if needed. Scenario 4: ABS warning light illuminates during high-speed driving. Cause: The ABS control unit detects a significant discrepancy between rear and front wheel speeds. This may also occur due to incorrect tire or wheel rim specifications. Solution: Refer to the vehicle's recommended tire and wheel rim specifications, typically found on the label near the fuel tank cap. Scenario 5: ABS warning light intermittently illuminates. Cause: Improper adjustment of the brake light switch or internal contact issues in the brake light. Solution: With the engine running, press the brake pedal and manually push the brake switch linkage downward to its limit, then release the pedal to complete self-positioning. Replace the brake light switch if necessary.

7

2

Share

What Documents Are Needed for a Free First Car Maintenance?

Documents required for the first maintenance include: driver's license; maintenance manual; warranty manual; owner's ID card; vehicle registration certificate; vehicle purchase invoice, to be taken to the designated first maintenance facility for the vehicle's initial service. Important note: Make an appointment with the 4S shop in advance. The first maintenance refers to the initial service after a new car has been driven. The specific timing varies by vehicle, with most models requiring their first maintenance (first service) at 5,000 kilometers. The exact time should be based on the maintenance manual's instructions. It's crucial to attend the first maintenance on time, neither early nor delayed. The completion of the first maintenance signifies the end of the vehicle's break-in period, allowing it to be driven under standard load and normal speed as required by the car. The timing for the first maintenance is calculated from the date of vehicle pickup. There are two indicator values for the first maintenance: mileage and time. Whichever comes first serves as the standard. First maintenance items include: changing the engine oil and oil filter, cleaning the air filter, checking various fluid levels for normalcy, inspecting the generator belt and wiper blades for damage, checking tire pressure for normalcy, and examining tires for damage or bulges. Estimated time required: Approximately 2 hours to complete all tasks. The most critical aspect of a new car's first maintenance is changing the engine oil and oil filter. When changing the oil, the oil filter must also be replaced simultaneously. The selection of engine oil must refer to the "Vehicle Usage and Maintenance Manual," as different vehicle models specify different grades of engine oil. Maintenance precautions: Do not wash the interior of the car with water: Many people clean their cars during holidays, using water and a cloth to scrub. It's important to note that the car's interior should not be directly washed with water. If the floor mats are dirty, they can be cleaned with a vacuum cleaner or removed, scrubbed with a brush and detergent, dried, and then placed back. There are many drainage holes under the rubber mats on the floor of the driver's compartment. If water enters, it won't dry naturally but will flow through these holes to areas like the transmission, causing erosion and corrosion. The best practice is to clean with a vacuum cleaner and then wipe with a cloth to prevent water accumulation. Do not mix different brands of antifreeze: When the car's antifreeze is low, it's recommended to drain the existing antifreeze and refill it with the same brand. Different brands of antifreeze have varying chemical properties. Mixing different types of antifreeze can lead to corrosion among the additives. Therefore, avoid mixing different brands of antifreeze to prevent unnecessary issues. Do not lubricate tire bolts and nuts: When bolts on a moving car rust, they are often oiled to function properly again. Some people apply lubricant to wheel bolts and nuts to prevent rust, but this can pose safety risks. At high speeds, bolts and nuts may loosen or even fall off, leading to driving malfunctions. No need to press the accelerator when shifting gears in an EFI car: The throttle control in an Electronic Fuel Injection (EFI) car differs from that in a conventional car. The EFI's fuel injection control device can automatically adjust the fuel supply based on the throttle's temperature and operating conditions, ensuring smooth acceleration.

19

0

Share

Is it no longer necessary to display the vehicle inspection sticker?

It is now no longer necessary to display the vehicle inspection sticker. Here is more information: 1. Electronic inspection certification: Since June 2020, electronic vehicle inspection certification has been implemented nationwide. The electronic inspection certification has the same effect as the paper version. After obtaining it, it can be directly saved on your mobile phone, and you can present the electronic inspection certification during law enforcement inspections. 2. Uniform provision of electronic inspection certification: Since the implementation of electronic inspection certification, during annual vehicle inspections, including when vehicles require on-site testing, only electronic inspection certification is uniformly provided, and paper versions are no longer issued.

14

3

Share

What Causes the Abnormal Noise When the Car Air Conditioner is Turned On?

What Causes Water Leakage from the Right A-Pillar of a Car?

Will there be any issues if a family car's annual inspection is overdue by a few months?

Reasons for the ABS Warning Light Illuminating in the Teana

What does the BMW ABS warning light indicate?

What Documents Are Needed for a Free First Car Maintenance?

Is it no longer necessary to display the vehicle inspection sticker?

Is it acceptable to change fully synthetic engine oil once a year?

Is it allowed for private cars to drive on the highway between 2 to 5 AM?

What are the symptoms of a damaged brake master cylinder in large vehicles?

Can Vehicle Annual Inspection Be Done in Advance?