How to Fix B1311 Power Door Unlock Circuit Open

Introduction

If you’re experiencing issues with your car’s power door unlock system, you may have encountered the B1311 error code. This code indicates that there is an open circuit in the power door unlock system, which can prevent your doors from unlocking properly. Fortunately, fixing this issue is relatively simple and can be done with a few basic tools and some know-how.

Step 1: Check the Fuses

The first step in fixing the B1311 error code is to check the fuses. Start by locating the fuse box in your car, which is typically located under the dashboard or in the engine compartment. Look for the fuse that corresponds to the power door unlock system and check to see if it has blown. If the fuse is blown, replace it with a new one and test the system to see if the error code has been resolved.

Step 2: Check the Wiring

If the fuses are not the issue, the next step is to check the wiring. Start by inspecting the wiring harness that connects to the power door unlock system. Look for any signs of damage, such as frayed wires or loose connections. If you find any issues, repair or replace the wiring as needed.

Step 3: Check the Door Lock Actuator

If the wiring is not the issue, the next step is to check the door lock actuator. This is the component that physically unlocks the doors when you press the unlock button on your key fob or inside the car. Start by removing the door panel and locating the door lock actuator. Test the actuator by applying power directly to it and see if it moves. If it does not move, replace the actuator.

Step 4: Check the Door Lock Switch

If the door lock actuator is not the issue, the next step is to check the door lock switch. This is the component that you press to unlock the doors from inside the car. Start by removing the door panel and locating the door lock switch. Test the switch by applying power directly to it and see if it activates. If it does not activate, replace the switch.

Step 5: Test the System

Once you have checked all of the components, it’s time to test the system. Reconnect the wiring harness, replace the door panel, and test the power door unlock system to see if the error code has been resolved. If the system is still not working properly, you may need to take your car to a professional mechanic for further diagnosis and repair.

Conclusion

Fixing the B1311 error code is relatively simple and can be done with a few basic tools and some know-how. By following these steps, you can diagnose and repair the issue with your car’s power door unlock system and get back on the road in no time.

FAQs

1. Can I fix the B1311 error code myself?

Yes, you can fix the B1311 error code yourself with some basic tools and know-how. However, if you are not comfortable working on your car’s electrical system, it’s best to take it to a professional mechanic.

2. How do I know if the door lock actuator is the issue?

You can test the door lock actuator by applying power directly to it and seeing if it moves. If it does not move, it is likely the issue and should be replaced.

3. What should I do if the system is still not working after following these steps?

If the system is still not working properly after following these steps, you may need to take your car to a professional mechanic for further diagnosis and repair.