B1395 Power Door Memory Lock Relay Circuit Short To Ground

Definition

Common causes

• Shorted wiring or connectors
• Faulty power door memory lock relay
• Damaged or corroded ground connections
• Malfunctioning door lock control module
• Faulty switches or actuators in the door lock system

Common misdiagnoses

• Faulty door lock actuator
• Defective body control module (BCM)
• Wiring issues or shorts in the harness
• Malfunctioning power door lock switch
• Incorrectly diagnosed battery or charging system problems
• Issues with the vehicle's security system
• Faulty relay or fuse related to the door lock system

Troubleshooting steps

1. 1. Understand the Code

   B1395 typically relates to the power door lock system, specifically indicating that the relay circuit is shorted to ground. This can affect the operation of the door locks and memory functions

2. 2. Visual Inspection

   Wiring and Connectors: Inspect the wiring harness and connectors associated with the power door lock system. Look for frayed wires, corrosion, or loose connections that could cause a short to ground

3. 3. Relay Condition

   Check the condition of the door lock relay. If it’s damaged or burnt, it may need to be replaced

4. 4. Check the Relay

   Test the Relay: Remove the relay and test it using a multimeter. Check for continuity and ensure it operates correctly when energized

5. 5. Replace if Necessary

   If the relay is faulty, replace it with a new one

6. 6. Inspect the Door Lock Actuators

   Actuator Functionality: Check the door lock actuators for proper operation. A malfunctioning actuator can cause a short circuit

7. 7. Resistance Check

   Measure the resistance of the actuators. If the resistance is too low, it may indicate a short

8. 8. Check for Shorts

   Continuity Test: Use a multimeter to check for continuity between the relay circuit and ground. If you find continuity where there shouldn’t be any, you likely have a short

9. 9. Inspect Ground Points

   Ensure that all ground points related to the door lock system are clean and secure

10. 10. Scan for Additional Codes

    Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

11. 11. Inspect the Body Control Module (BCM)

    BCM Functionality: The BCM controls the power door locks. If it’s malfunctioning, it could cause issues with the relay circuit

12. 12. Software Updates

    Check if there are any software updates available for the BCM that might address known issues

13. 13. Test the Circuit

    Voltage and Ground Tests: With the ignition on, use a multimeter to check for proper voltage at the relay and ensure that the ground circuit is functioning correctly

14. 14. Wiring Diagrams

    Refer to wiring diagrams specific to your vehicle to trace the circuit and identify any potential issues

15. 15. Repair or Replace Components

    Based on your findings, repair any damaged wiring, replace faulty components (like the relay or actuators), and ensure all connections are secure

16. 16. Clear Codes and Test Drive

    After making repairs, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.1

17. 17. Consult a Professional

    If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to diagnose and potentially fix the issue related to the B1395 code. Always refer to your vehicle’s service manual for specific details and procedures