What are the reasons for the Haval H2's auto-hold failure preventing startup?
2 Answers
The reason why the Haval H2's auto-hold failure prevents the engine from starting may be that the vehicle's driver door is not properly closed. Introduction to the auto-hold function: Auto-hold refers to an automatic braking function. When activated, such as when stopping at a traffic light, it eliminates the need to pull the handbrake, avoiding the cumbersome operation of using a manual or electronic handbrake. Principle of Haval H2's auto-hold: Through a slope sensor, the controller provides precise parking force. During startup, the parking control unit calculates information from the clutch distance sensor, clutch engagement speed sensor, and throttle pedal sensor. When the driving force exceeds the running resistance, the parking brake is automatically released, allowing the car to start smoothly.
The Harvard H2's auto-hold function fails to start, an issue I've encountered multiple times. Possible causes include operational errors such as incorrect gear selection or doors not being properly closed; aging battery leading to insufficient power supply, affecting system response; dirty or damaged sensors, like a lost brake sensor signal causing malfunction; software bugs requiring system updates to fix; or environmental factors such as excessively steep slopes automatically disabling the feature. From my experience, initial self-troubleshooting steps include restarting the vehicle, checking if the settings are activated, and cleaning the sensor areas. If these don't work, it's best to visit a professional shop to test the battery voltage and read fault codes. Regular maintenance is crucial—periodic battery checks and sensor cleaning can prevent issues, avoiding sudden system failures that pose safety risks while driving.
