What is the reason for sudden high idle speed when stepping on the brake?

1 Answers
VonJustin
07/29/25 10:04pm
The reason for sudden high idle speed when stepping on the brake is that the transmission downshifts, causing a momentary increase in torque, which is a normal phenomenon. The braking system consists of a vacuum booster pump, master brake cylinder, wheel brake cylinder, brake pads, and brake discs. The brake has the function of reducing vehicle speed, and the precautions for its use are as follows: 1. Slow down: Brake gently when following another vehicle. 2. Rainy days: Use emergency braking cautiously on rainy days. 3. Braking: Avoid using emergency braking on slopes and curves. The solutions for brake failure are as follows: 1. Pedal: Release the accelerator pedal. 2. Gear: Shift to manual mode and manually downshift from high gear to low gear. 3. Handbrake: When pulling the handbrake, press the release button and pull the handbrake continuously, but do not pull it to the locked position. 4. Parking gear: Shift into park after the vehicle comes to a stop.
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