What are the reasons for the Haval H2's auto-hold failure preventing startup?

[PaisleyLee]

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.

[LeLillian]

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.

[JulianaLee]

When repairing cars, issues like the Haval H2 malfunction are frequently encountered, primarily stemming from electronic control system problems, such as burnt-out relays or faulty speed sensors. Unstable power supply, like low battery voltage, can easily trigger the protection mechanism; software bugs require updating the program with a diagnostic tool; operational errors, such as system lock after sudden braking, can be resolved with a simple restart. Focus on checking the power supply and sensor interfaces, using a multimeter to test if the battery voltage is below 12V; don't delay addressing minor issues, as they can have a chain reaction affecting the brake safety system. It is recommended that car owners prioritize checking the brake fluid level and wiring connections; if ineffective, seek professional repair to inspect module hardware, ensuring the hill start assist functions properly.

[Pinto]

When driving my Haval H2, I encountered issues with the auto-hold function. It often didn't activate due to unconfigured APP settings or software freezing; sometimes it wouldn't engage on very steep slopes. For troubleshooting, check if the central control settings are enabled; try restarting or updating the software version. Similar cases shared in online communities are quite reliable—follow the steps in the user manual. Remember, don't solely rely on the system for driving safety. Regular maintenance, cleaning sensors, and checking the battery can help minimize problems.