Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Position Detection
The spindle drives are each integrated with a motor. The motor contains two Hall sensors. The Hall sensors are arranged with relative offset. This enables detection of the motor's direction of rotation. In addition, it is possible to draw conclusions as to the remaining path of the luggage compartment lid based on the Hall sensor pulses.
The complete movement range of the luggage compartment lid from "CLOSED" to "OPEN" is recorded during assembly in the works. The HKL therefore knows how many Hall sensor pulses were generated between lower and upper end stop of the luggage compartment lid.
The number of Hall sensor pulses corresponds to the distance covered by the luggage compartment lid. With this information, the HKL is able to determine the opening angle of the luggage compartment lid.
The path of the luggage compartment lid is subdivided into various segments. From the Hall sensor pulses, the HKL knows the segment in which the luggage compartment lid is positioned. If the luggage compartment lid is fully open, it is positioned within the range of the upper segment. From there, the luggage compartment lid is always moved in the closing direction.
| Index | Explanation |
|---|---|
| 1 | Upper segment |
| 2 | Range between the upper and lower segment |
| 3 | Lowermost segment |
If the luggage compartment lid is in the range of the lower segment, i.e. closed, the luggage compartment lid is always moved in the opening direction.
The current position of the luggage compartment lid is stored by the HKL before it enters sleep mode. When the vehicle wakes up, the most recently stored position is used as the current position.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.