What Causes a Car Not to Move When in Gear?
1 Answers
After starting the vehicle, if it does not move when in gear, consider the following reasons: drive shaft detachment, clutch slippage, handbrake not released or not returning, or brake not returning. Detailed reasons: Check if the handbrake is released. If the vehicle still does not move after releasing it, the issue might be with the brake system or transmission. In this case, the brake system and transmission need to be inspected and repaired. Check if the drive shaft is rotating. If it is rotating, the problem lies with the rear axle. If not, the issue is with the transmission or clutch. In this scenario, the transmission and clutch need to be checked. If the gear is not fully engaged, the vehicle will not move, and the odometer will not register any distance. Normally, the engine should idle at 800-1000 rpm, and the tachometer should rise to higher RPMs when accelerating. In this case, simply shift into gear again. Classification of automotive fault diagnosis methods: There are two basic methods for automotive fault diagnosis: manual diagnosis and instrument-based diagnosis. Manual diagnosis relies on the experience and knowledge of the technician, using simple tools and sensory methods such as visual inspection, listening, and touch to inspect, test, and analyze the vehicle's condition. This method is straightforward and intuitive and serves as the foundation for modern fault diagnosis expert systems. Instrument-based diagnosis uses general or specialized equipment to inspect the vehicle, assemblies, and mechanisms, providing quantitative data for analyzing the vehicle's condition and identifying faults. Some computer-controlled or expert system-equipped devices can automatically test, analyze, judge, and make decisions about the vehicle's condition. Instrument-based diagnosis is objective, quantitative, and fast, promoting the development and application of automotive diagnostic technology. In practice, both methods are often combined. The technician first asks the driver about the fault symptoms, performs a visual inspection, and makes an initial judgment based on experience. Then, diagnostic instruments are used to further screen, identify, and confirm the fault.
