What are the reasons for the alarm sounding on the JAC Refine S3?
4 Answers
There may be several reasons for the alarm sounding: 1. The sensitivity of the trigger is too high: The alarm may activate in response to minor vibrations or small noises. Sometimes, excessive vibration can also trigger the car alarm. If the alarm is too sensitive, you can fine-tune it using the sensitivity adjustment knob on the anti-theft vibration sensor. 2. Doors not properly closed: This includes not only the car doors but also the engine hood or the trunk. If any of these components are not securely closed, the car alarm will activate. If not addressed, the alarm will continue to sound until the car battery is drained or the door is properly closed. 3. Controller malfunction: The alarm may sound due to a faulty, short-circuited, or failed controller in the alarm system. During daily driving, if the car alarm sounds, it is important to promptly check if someone is tampering with the vehicle. If the alarm activation is not caused by human interference, a thorough inspection is necessary.
My JAC Refine S3 also had the issue of the alarm going off randomly a while back. It turned out the main cause might be the doors not being closed properly, especially if the trunk latch gets muddy or stuck with debris, which can cause the sensor to misjudge. Another time, it was because of a windy day—the car was parked under a tree, and falling branches hit the roof, triggering the overly sensitive vibration sensor. A dead key fob battery can also cause this issue, as poor signal reception can easily trigger false alarms. Additionally, if the wiring has been modified, such as when installing a reverse radar and tampering with the wires, poor insulation on the connections leading to a short circuit can also cause this. Check the relays and fuses under the hood—these areas are particularly prone to corrosion in humid weather, and poor contact can make the alarm go off. Always double-check that doors are closed properly and regularly inspect the door and window seals to prevent most of these issues.
I've encountered quite a few cases of false car alarm triggers. The most common issue is doors not being properly closed - even a slight gap can set off the alarm system. Overly sensitive vibration sensors are another widespread problem, where passing trucks or firecrackers can trigger the alarm. Don't overlook aging electrical contacts, especially in older vehicles where rainwater seeping into wiring can cause resistance changes. Some owners forget their remote keys inside the car, causing the system to alarm when detecting metal object movement. Aftermarket electrical installations are another pitfall - for example, improperly wired dash cams can interfere with anti-theft modules. Even an unsecured spare tire cover can activate the trunk sensor, a detail many people never consider.
Vehicle alarm triggers usually follow discernible patterns. Unlatched doors are the primary cause, particularly when side doors aren't closed with sufficient force. The anti-theft system monitors abnormal body movement via angular displacement sensors, but severe road bumps or minor external impacts may cause false alarms. In electrical systems, declining battery voltage can lead to control chip misjudgments, especially with batteries over three years old. Aftermarket devices drawing power from dome lights may divert current from main circuits. Sensor connector oxidation causing signal distortion is not uncommon, particularly in high-humidity regions. Intermittent faults occur when dust or moisture enters compromised main control unit seals, requiring professional diagnostics for accurate troubleshooting.
