B1394 – OBD-II DTC

OBD-II DTC B1394 – Power Door Memory Lock Relay Circuit Short To Battery

DTC B1394 meaning

DTC B1394 refers to a diagnostic trouble code indicating a short circuit in the power door memory lock relay circuit to the battery. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle systems for faults. When the power door memory lock relay circuit experiences a short to battery, it can lead to issues with the locking mechanism of the vehicle’s doors.

DTC B1394 symptoms

Common symptoms associated with DTC B1394 may include:

• Power door locks not functioning properly
• Doors locking or unlocking unexpectedly
• Inability to use remote keyless entry
• Battery drain due to continuous power draw
• Warning lights on the dashboard related to the door lock system

DTC B1394 causes

Several factors can lead to the occurrence of DTC B1394, including:

• Faulty power door memory lock relay
• Wiring issues, such as frayed or damaged wires
• Corrosion in electrical connectors
• Short circuits in the door lock actuator
• Malfunctioning body control module (BCM)

DTC B1394 seriousness

The seriousness of DTC B1394 can vary based on the symptoms and the impact on vehicle functionality. While it may not pose an immediate safety risk, it can lead to:

• Inconvenience due to malfunctioning door locks
• Potential battery drain if the issue is not addressed
• Increased repair costs if the problem worsens

How to diagnose DTC B1394

To diagnose DTC B1394, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1394 code.
2. Inspect the power door memory lock relay for visible damage or corrosion.
3. Check the wiring and connectors for signs of wear or short circuits.
4. Test the relay operation using a multimeter.
5. Examine the body control module for faults or software issues.

How to fix DTC B1394 step-by-step instructions

To fix DTC B1394, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring or connectors related to the power door memory lock relay.
3. Replace the faulty power door memory lock relay if necessary.
4. Check the door lock actuators for shorts and replace them if needed.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the door lock system to ensure proper functionality.

How to erase DTC B1394

To erase DTC B1394 from the vehicle’s computer, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the trouble codes section on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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