What does the A button on an automatic transmission mean?
1 Answers
The A button on an automatic transmission vehicle refers to the Auto Hold function, which enables drivers to prevent unnecessary vehicle sliding without the need for prolonged braking or engaging the electronic parking brake. The Auto Hold function automatically activates four-wheel braking when stopping at traffic lights or on slopes. Even when in D or N gear, there's no need to keep the foot on the brake pedal or use the handbrake, as the vehicle remains stationary. Through slope sensors, the Auto Hold function provides precise braking force via the control unit. During startup, the parking control unit calculates information from clutch distance sensors, clutch engagement speed sensors, and accelerator pedal sensors. When the driving force exceeds the running resistance, it automatically releases the parking brake, allowing smooth vehicle departure and significantly reducing time wasted on experience-based judgment.