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Home/Cars/BMW/3 Series/G20/G21 (2019-2024)/what causes the backup camera to have a black screen in my BMW 3 Series G20/G21 (2019-2024)?

what causes the backup camera to have a black screen in my BMW 3 Series G20/G21 (2019-2024)?

BMW 3 Series G20/G21 (2019-2024)

Severity: mediumDifficulty: medium1-3 hours
3 min read
483 words

Problem Statement

## Problem Statement The backup camera in the BMW 3 Series G20/G21 (2019-2024) is displaying a black screen, indicating an issue with the camera system or associated components.

Repair Time
1-3 hours

Safety Warnings

  • ⚠Safety Warnings:**
  • ⚠Disconnect the battery before working on electrical components.

Symptoms

  • •Black screen when the vehicle is in reverse.
  • •No grid lines or guidelines displayed.
  • •Camera icon may not appear on the screen.
  • •Possible error messages displayed on the infotainment system.
  • •Inconsistent behavior (e.g., camera works intermittently).

Diagnostic Steps

  1. 1Check for any error codes using an OBD-II scanner specific to BMW systems.
  2. 2Inspect the backup camera lens for physical obstructions or damage.
  3. 3Verify the vehicle is in reverse gear and ensure the transmission is functioning properly.
  4. 4Examine the wiring and connections to the backup camera for signs of wear or disconnection.
  5. 5Test the display unit functionality by activating other camera features (e.g., surround view if available).
  6. 6Perform a software update on the vehicle's infotainment system to ensure compatibility.

Solution

Solution

1. Preparation

  • Gather necessary tools and replacement parts.
  • Disconnect the vehicle battery to prevent electrical shorts.
  • Allow the vehicle to cool down if recently driven.

2. Inspect and Clean the Camera

  • Remove any dirt or debris from the camera lens using a soft cloth.
  • If the lens is damaged, replace the camera assembly.
  • For wiring issues, trace the cable from the camera to the connector, checking for abrasions or breakage.

3. Check Wiring and Connectors

  • Remove any panels or covers to access the backup camera harness.
  • Inspect connectors for corrosion or loose connections.
  • Re-seat or replace any compromised connectors.

4. Test the Backup Camera

  • Reconnect the battery and activate the vehicle's reverse gear.
  • Monitor the infotainment screen for camera activation.
  • If the camera still shows a black screen, proceed to replace the camera assembly.

5. Replace the Backup Camera (if needed)

  • Disconnect the camera from its harness.
  • Remove mounting screws and take off the old camera.
  • Install the new camera by reversing the removal process.
  • Reconnect the wiring harness and ensure it is secure.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Socket set
  • Screwdriver set
  • Soft cleaning cloth

Parts Required

  • Backup camera assembly (if replacement is necessary)
  • Connectors (if damaged)

Additional Information

Repair Time

1-3 hours

Difficulty

medium

Severity

medium

Tools

4 items

Parts

2 items

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