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Why Does the Cruise Control Function Fail?

2 Answers

VonTimothy

07/29/25 2:42am

The following are the reasons and solutions for cruise control function failure: 1. Speed does not meet the requirements: Cruise control activation requires the vehicle speed to meet the system's specified conditions, otherwise the cruise control system cannot start normally. Solution: Ensure the vehicle speed reaches 40 kilometers per hour. 2. Malfunction during driving: The system cannot be stopped by pressing the brake or clutch during driving. There are two main reasons: one is cruise switch damage or circuit failure (such as brake pedal sensor failure, wheel speed sensor failure, or related circuit failures); the other is the ECU's inability to receive signals from the cruise control solenoid valve. Solution: Immediate repair at a service center is required in such cases.

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Piper

08/12/25 6:38am

When I drive long distances, the cruise control occasionally fails for various reasons. The most common issue is the wheel speed sensor being covered by mud or ice, preventing the system from detecting speed changes and causing it to automatically shut off. If the brake system switch is too sensitive or worn out, even a light touch can trigger the cancellation function. There are also speed limitations—cruise control won't work below 40 km/h or above 150 km/h. Loose wiring or a blown fuse can also interrupt signal transmission. Environmental factors like rain or bumpy roads increase the risk. It's recommended to regularly check and clean the sensors and keep the control unit dry. If the system fails, switch to manual driving to avoid distractions and ensure safety. Proper maintenance can extend the system's lifespan.

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