The function of the rearview mirror
The rearview mirror of a car is a safety component installed on both sides of the vehicle and the front of the interior. It is an important safety part of the vehicle, and its quality and installation must comply with industry standards and norms. By reflecting the road conditions behind, on the sides and below the vehicle, the driver's field of vision is expanded. According to the installation position, they are divided into exterior rearview mirrors and interior rearview mirrors. Among them, interior rearview mirrors mostly use plane mirrors to provide proportional images, while exterior rearview mirrors use convex mirrors to expand the field of vision.
The adjustment of the rearview mirrors should follow specific norms: the left mirror should retain 1/4 of the vehicle body proportion and place the horizon at the center line; the right mirror should retain the same vehicle body proportion and the ground should occupy 2/3 of the mirror surface; the central rearview mirror should completely exclude the driver's own image. When driving, you need to use the three mirrors to observe the road conditions. Before changing lanes or turning, you must confirm the traffic conditions on the side and behind through the rearview mirror. For blind spots that cannot be covered, you need to make up for them by turning your head to observe.
Common causes of rearview mirror failure include setting issues, abnormal power supply, mechanical component damage or electronic system failure. Youdaoplaceholder0 Solutions should be selected based on the specific type of fault, such as self-checking Settings, replacing fuses, lubricating components or professional maintenance , to ensure driving safety.
Common types and causes of faults
Rearview mirror malfunctions mainly fall into the following four categories and require targeted treatment:
Youdaoplaceholder0 Settings or functions are not enabled : The rearview mirror adjustment knob is not set to "AUTO" mode, or the "Lock auto Fold" option is not enabled in the central control system.
Youdaoplaceholder0 power system anomaly :
The protection mechanism is triggered when the battery is discharged (voltage lower than 11V).
The fuse has blown (commonly seen in 15A specification), and a product of the same model needs to be replaced.
Youdaoplaceholder0 mechanical component failure :
Gear slippage, breakage or guide rail jamming (accounting for 34% of the failure rate) is mostly caused by external impact or long-term wear.
Motor damage (no vibration feedback) or failure of the transmission screw.
Youdaoplaceholder0 Electronic system issues : line oxidation, control module failure (such as abnormal BCM data flow), or CAN bus interference.
Step-by-step solution
Take the following measures according to the type of fault:
Youdaoplaceholder0 basic self-check :
Check if the knob is in the "AUTO" position and enter the central control screen to confirm that the function is enabled.
Clear foreign objects around the mirror body (such as frost and sand), and gently push the mirror body to test if it gets stuck.
Youdaoplaceholder0 power and line handling :
Replace the blown fuse (refer to the vehicle manual for the position).
Disconnect the negative terminal of the battery for 15 minutes to reset the system, or hold down the fold key for 5 seconds to initialize.
Youdaoplaceholder0 mechanical fault repair :
Gear or guide rail issues: Spray silicon-based grease and reset manually.
Motor failure: If there is no resistance during manual operation but the motor does not work, the assembly needs to be replaced.
Youdaoplaceholder0 professional maintenance advice :
Use a diagnostic tool to read the fault code (such as B1400 or U0232), and focus on checking the body control module.
When it comes to circuit or assembly replacement, it is advisable to give priority to 4S stores or authorized repair points (free handling is available within the warranty period).
Rearview mirrors and rearview mirrors are often distinguished in automotive terminology. Youdaoplaceholder0 rearview mirrors mainly refer to the exterior rearview mirrors on both sides of a vehicle, which are used to observe obstacles and distances behind when reversing. The rearview mirror is a broader system, including the left, right and central interior rearview mirrors, which are used to observe the surrounding environment during normal driving.
Differences in location and function
Youdaoplaceholder0 rearview mirror : Installed at the rear of the vehicle or below the side pillars, its function focuses on the reversing scene, such as observing obstacles and distances behind.
Youdaoplaceholder0 rearview mirror : consists of three parts:
The left and right exterior rearview mirrors (which can be regarded as rearview mirrors) are used to observe the side and rear.
The central interior rearview mirror (located on the front windshield) is used to observe the overall road conditions behind the vehicle, and some of them have anti-glare functions.
The rearview mirror system is used for lane changing, turning and other operations during normal driving to reduce blind spots in the field of vision.
Adjustment and Materials
Youdaoplaceholder0 adjustment method :
Rearview mirror: The left horizon is centered, and the vehicle body occupies 1/4. The ground on the right side takes up two-thirds.
Central rearview mirror: Focuses on the rear view of the vehicle and can be adjusted as needed.
Youdaoplaceholder0 Material : In China, silver or aluminum is mostly used for rearview mirror reflective films, while chromium is mainly used abroad. The materials of the rearview mirrors are similar, but their optical properties may vary slightly due to functional requirements.
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