B1393 – OBD-II DTC

OBD-II DTC B1393 – Power Door Memory Lock Relay Circuit Open

DTC B1393 meaning

DTC B1393 refers to a diagnostic trouble code indicating an issue with the Power Door Memory Lock Relay Circuit. Specifically, it signifies that there is an open circuit in the relay responsible for controlling the power door locks. This can prevent the locks from functioning properly, affecting the vehicle’s security and convenience features.

DTC B1393 symptoms

Common symptoms associated with DTC B1393 may include:

• Power door locks not functioning
• Inability to lock or unlock doors remotely
• Door lock switches may be unresponsive
• Possible warning lights on the dashboard

DTC B1393 causes

Several factors can lead to the occurrence of DTC B1393, including:

• Faulty power door memory lock relay
• Wiring issues, such as frayed or broken wires
• Corroded connectors in the relay circuit
• Malfunctioning door lock switches
• Issues with the vehicle’s body control module (BCM)

DTC B1393 seriousness

The seriousness of DTC B1393 can vary based on the vehicle’s use and the owner’s needs. However, it is generally considered a moderate issue because:

• It affects the functionality of the power door locks, which are essential for vehicle security.
• It may lead to further electrical issues if not addressed.
• While it may not affect the vehicle’s drivability, it can compromise safety and convenience.

How to diagnose DTC B1393

To diagnose DTC B1393, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the power door memory lock relay for visible damage or corrosion.
3. Check the wiring and connectors associated with the relay for any signs of wear or disconnection.
4. Test the relay using a multimeter to ensure it is functioning correctly.
5. Examine the door lock switches for proper operation.
6. Check the body control module for any related fault codes or issues.

How to fix DTC B1393 step-by-step instructions

To fix DTC B1393, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Locate the power door memory lock relay and inspect it for damage.
3. If the relay is faulty, replace it with a new one.
4. Repair or replace any damaged wiring or connectors found during the inspection.
5. Test the door lock switches and replace them if they are not functioning properly.
6. Reconnect the battery and clear the DTC using an OBD-II scanner.
7. Test the power door locks to ensure they are operating correctly.

How to erase DTC B1393

To erase DTC B1393, follow these steps:

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

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