what does it mean when my Volkswagen Golf MK7 (2015-2019) shows a B1681 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical systems.

2. Inspect and Replace Fuses

• Locate the fuse box (usually under the dashboard or in the engine compartment).
• Remove the cover and check the fuse associated with the interior lighting and comfort systems.
• If blown, replace it with a new fuse of the same amperage rating.

3. Check Wiring and Connectors

• Visually inspect the wiring harness for the interior lighting and comfort control systems.
• Look for frayed wires, loose connections, or corrosion.
• If any damage is found, repair or replace the wiring as necessary.

4. Test Comfort Control Module (CCM)

• Locate the CCM, usually found under the dashboard.
• Using a multimeter, check for proper voltage at the module connector.
  • Reference the vehicle's service manual for the specific voltage requirements.
• If the CCM is not receiving power, trace the wiring back to the fuse box or battery.

5. Reconnect and Test

• Reconnect the vehicle battery after all inspections and repairs are complete.
• Turn on the ignition and check if the interior lights and comfort features are operational.
• Clear the trouble codes using the OBD-II scanner and perform a test drive.