my BMW 3 Series F30/F31 (2012-2019) forward collision warning keeps activating, what's wrong?

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, cleaning cloths, diagnostic tool for calibration.
• Safety Warnings: Disconnect the battery before working on electrical systems.

2. Clean Sensors

• Sub-steps:
  1. Locate the forward collision warning sensors at the front of the vehicle.
  2. Use a soft cloth and a suitable glass cleaner to clean the sensor lenses.
  3. Ensure there are no obstructions like dirt, ice, or stickers on the sensor area.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Visually inspect the wiring harness for any signs of wear, fraying, or corrosion.
  2. If damaged wires are found, cut out the damaged section and splice in new wiring using solder and heat-shrink tubing for insulation.
  3. Secure all connections and ensure that the harness is properly routed to avoid future damage.

4. Perform Sensor Calibration

• Sub-steps:
  1. Reconnect the battery after completing the previous steps.
  2. Use a compatible diagnostic tool to access the forward collision warning system settings.
  3. Follow the tool's instructions to initiate the calibration process, ensuring the vehicle is on a level surface and in a safe position.
  4. Verify that the calibration was successful through the diagnostic tool.