Can Online License Plate Selection Be Canceled?

What Causes the ABS Red Light to Illuminate?

ABS light illumination can occur in various states, each with different fault causes and corresponding solutions, as detailed below: State 1: ABS warning light remains constantly lit (most common). Cause 1: The ABS wheel speed sensor's sensing area is covered by contaminants such as mud or dirt, affecting its ability to detect vehicle speed signals. This prevents the ABS control module from determining vehicle speed or calculating wheel slip rates, thereby disabling its ability to issue appropriate commands for brake adjustment. Solution: Clean the dirt from the wheel speed sensor and adjust the gap between the sensor and the tone 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 re-secure any loose connections. State 2: ABS warning light intermittently illuminates but turns off during acceleration. Cause: When multiple electrical components are in use, battery voltage drops below 10.5V. As engine speed increases, voltage rises and the ABS light extinguishes. This may also indicate insufficient power supply voltage to the ABS system due to poor terminal contact or grounding issues. Solution: Check battery specific gravity; inspect charging system; examine power supply components (e.g., voltage relay or poor power connections). State 3: ABS warning light remains illuminated after engine start until engine IFF (Ignition Off) occurs. Cause: Poor grounding connection of ABS hydraulic valve body; faulty wiring connections at ABS hydraulic valve body; ABS control module malfunction. Solution: Loosen and retighten hydraulic valve body ground screw, cleaning contact surfaces if necessary; check for enlarged connector gaps; replace ABS or ABS/ASR control module. State 4: ABS warning light illuminates during high-speed driving. Cause: ABS control module detects excessive speed difference between rear and front wheels; incorrect tire or wheel rim specifications. Solution: Verify proper tire and wheel rim specifications as indicated on vehicle specifications or fuel filler cap label. State 5: ABS warning light flashes intermittently. Cause: Improper brake light switch adjustment; internal contact failure in brake lights. Solution: With engine running, depress brake pedal and manually push brake switch linkage downward to its limit, then release pedal to complete self-calibration; replace brake light switch if necessary. When the ABS warning light is illuminated, continued driving is not recommended. An active ABS light indicates malfunction in the anti-lock braking system. During emergency braking, wheel lock-up may occur, potentially causing loss of vehicle control and skidding, preventing the driver from decelerating or adjusting vehicle trajectory - presenting significant safety risks.

8

5

Share

What is the sequence of the C2 automatic transmission Subject 2 driving test?

The sequence of the C2 Subject 2 test items is: reverse parking, parallel parking, curve driving, and right-angle turning. Compared to the C1 manual transmission test, it excludes the hill start. According to Article 25 of the "Regulations on the Application and Use of Motor Vehicle Driving Licenses" (Ministry of Public Security Order No. 123), starting from June 1, 2021, the C2 and C5 Subject 2 tests no longer assess hill start and stopping. Reverse parking is considered one of the more challenging items in the Subject 2 test, which is why many test centers place it as the first item. The key to reverse parking lies in mastering three points: the steering wheel full-lock point, the 30 cm correction point, and the parking point inside the bay. Drivers must follow the prescribed route and sequence. The vehicle must be parked inside the bay without crossing the lines. Parallel parking focuses on aligning the front line of the parking space with the rear wheel, spotting the rear corner in the side mirror, and maintaining the correct distance between the wheel and the left dashed line. There's no need to straighten the wheels after parking, but don’t forget to use the turn signal when exiting. After parking, the vehicle body must not cross the lines, and the tires must not touch or press the lane boundary lines during movement. Curve driving, commonly referred to as the S-curve, is manageable for many students with good driving sense, indicating its relatively low difficulty. However, some students misjudge the line positions during the actual test, leading to immediate failure by crossing the lines. The key to the S-curve is observing the position of the hood marker points relative to the boundary lines. The wheels must not press the road edge lines. Right-angle turning is arguably the easiest, essentially a simplified version of the exit part in reverse parking. The method for finding the reference point is similar to exiting a bay—aligning the hood's horizontal line with the front line (either exactly on the line or slightly delayed). Ensure the wheels do not press the road edge lines. Generally, the required training hours for C1 Subject 2 are 16 hours, while C2 requires 14 hours. Completing the mandatory hours is a basic requirement for taking the Subject 2 test. Training hours can only be increased, not reduced, and additional test items require corresponding extra hours. Each training hour is 60 minutes, with effective teaching time no less than 45 minutes. If you fail Subject 2, you can retake it once. If you fail the retest, the current test session ends, and you must reschedule the test at least 10 days later. If you fail five consecutive test appointments (including retests, totaling 10 attempts), all previously passed subject scores will be voided, and you must restart the learning and testing process from Subject 1.

15

1

Share

Will the Malfunction Indicator Light Turn On If the Three-Way Catalytic Converter Fails?

A faulty three-way catalytic converter can cause the malfunction indicator light to illuminate. The three-way catalytic converter is the most important external purification device installed in a vehicle's exhaust system. Methods to determine the condition of the three-way catalytic converter: Visual Inspection. Examine the exterior of the three-way catalytic converter for any damage or discoloration. Scratches, cracks, or other visible damage may indicate that the converter has been compromised. If there are noticeable gray spots in the center of the converter's protective cover, severe discoloration, or purple marks on the shell, it may suggest overheating issues. Check the Engine Exhaust. Place your hand near the tailpipe outlet to feel the exhaust flow and assess whether the three-way catalytic converter is clogged or if there are any exhaust flow issues. Another method is to open the air filter, remove the filter element, and observe if there is any exhaust backflow during rapid acceleration, which would indicate poor exhaust flow. To evaluate the condition of the TWC (Three-Way Catalyst), also check if the secondary air injection pump is functioning properly. Use an Infrared Thermometer. Compare the temperature difference between the front and back of the TWC using an infrared thermometer. If the temperature difference between the inlet and outlet of the three-way catalytic converter is less than 10°C, the TWC is likely damaged.

15

2

Share

Can car battery replacement be done at home?

For car battery replacement, you can go to a battery retailer where they may offer a trade-in discount for your old battery and provide free installation for the new one. Here is some information about car batteries: Function: The battery plays a crucial role in the operation of a car. If the battery fails to supply power properly, the engine may encounter issues. Car owners should regularly inspect their batteries—weekly in summer and biweekly in winter. Factors affecting battery lifespan: Vehicle condition, road conditions, and driving habits; good driving habits can extend the battery's service life.

9

2

Share

Can You Apply Another Layer of Film Over the Original Car Film?

Yes, but it is not recommended. Here are the specific reasons: Poor Effect: It is best not to apply another layer of film over the original car film, as the treatment effect may be compromised. Unsafe: Applying new film directly over the old film without removing it makes it difficult to clean the dust on the old film thoroughly, which can lead to bubbles and trapped moisture that does not evaporate easily. Additionally, double-layered film can impair the driver's visibility, reducing safety. Conclusion: For optimal results and protection for both the vehicle and its occupants, it is advisable to remove the old film completely before applying a new one.

18

3

Share

Can I register for a driver's license test at the DMV?

Yes. To take the driver's license test, you need to register and apply at the DMV. Below is the relevant introduction: Motor Vehicle and Driver's License Business Supervision Post: Handles issues reported by the motor vehicle and driver's license business posts; Processes non-compliant procedures returned by the business leadership post; Inspects the business logs of various posts and announces relevant registration information as required; Supervises work discipline; Handles public complaints. Exam Supervision Post: Addresses issues reported by the exam post; Schedules candidates for the second and third test subjects; Conducts on-site random checks of the first and second test subjects, and performs random checks during the third test subject; Supervises work discipline; Handles public complaints.

20

1

Share

Can Online License Plate Selection Be Canceled?

What Causes the ABS Red Light to Illuminate?

What is the sequence of the C2 automatic transmission Subject 2 driving test?

Will the Malfunction Indicator Light Turn On If the Three-Way Catalytic Converter Fails?

Can car battery replacement be done at home?

Can You Apply Another Layer of Film Over the Original Car Film?

Can I register for a driver's license test at the DMV?

Will driving the wrong way on a one-way street always be photographed?

What are the classifications of four-wheel drive vehicle chassis?

What are the reasons for the inability to raise or lower the windows on all four doors of an old Passat B5?

How many kilometers can an Audi run when it indicates insufficient oil?