Damage to the micro switch of the car will lead to failure of the door prompt, abnormal anti-theft function, gear shift failure and safety hazards. The following are the specific manifestations:
1. Abnormal function of the door system
Failure of the door not closed reminder
After damage, the vehicle cannot detect whether the driver’s door is closed, there is no prompt on the instrument panel, and the small light of the corresponding door does not go out when the door is opened at night (affecting safety warning).
Automatic locking function failure
If the door is closed after the remote control is opened, the system may automatically lock within 30 seconds, causing the key to be locked in the car (need to break the window or spare key).
2. Failure of safety and anti-theft functions
Anti-theft alarm failure
There is no alarm prompt when the door is illegally opened, and the anti-theft system fails.
Missing reminder of light not closed
There is no buzzer prompt when the headlights or turn signals are not turned off, which may cause the battery to run low.
3. Gear shift and gearbox failure
Gear shift mechanism abnormal prompt
When starting, it displays “Please leave the vehicle after the gear position is in P position”, and even accompanied by a “gearbox failure” warning (need to replace the micro switch or external adjustment box to solve).
Abnormal oil pump preparation
Damage to the micro switch may cause the oil pump to be unprepared, resulting in difficulty in starting.
4. Other electrical problems
Poor contact or short circuit
Pressing requires force or repeated operation to trigger the function, which may cause short circuit or other electronic equipment failures in the long term.
Extended information
Model relevance : This problem was common in Volkswagen models before 2010 (such as Octavia and Sagitar), and was later solved by improving the gold plating process of the micro switch contacts.
Repair suggestions : When replacing, you can choose the original manufacturer (such as German Cherry) or a third-party brand (such as Omron). 4S stores often use the labor-saving solution of external micro switch boxes.