What are the reasons for insufficient clamping force in the H6 electronic parking brake?

[Phil]

If the H6 dashboard displays a warning about insufficient parking brake clamping torque, we need to check the following points: 1. Whether the brake fluid has not been replaced. Measure the water content in the brake fluid; normally, it should not exceed 3%. If the content exceeds 3%, it needs to be replaced. Excessive water content in the brake fluid can generate gas in the brake lines, leading to poor braking performance. In this case, the brake fluid should be replaced immediately, followed by a test drive to see if the issue is resolved. 2. Damage to the electronic parking brake control unit or parking brake switch, causing a fault. In this situation, it is necessary to visit a professional workshop to use a diagnostic tool to check the control unit for any fault codes and replace the damaged components based on the fault codes. 3. The generator not producing electricity, causing the battery to be undercharged. When using the electronic parking brake, the battery cannot provide the normal supply voltage or current, preventing the rear brake pads from clamping the brake disc to the specified torque. As a result, the dashboard will indicate an issue with the parking brake system.