B1392 – OBD-II DTC

OBD-II DTC B1392 – Power Door Memory Lock Relay Circuit Failure

DTC B1392 meaning

DTC B1392 refers to a fault in the Power Door Memory Lock Relay Circuit. This code indicates that the vehicle’s onboard diagnostic system has detected an issue with the relay responsible for controlling the power door locks, particularly in relation to the memory function that allows the locks to operate based on the driver’s preferences.

DTC B1392 symptoms

Common symptoms associated with DTC B1392 may include:

• Power door locks not functioning properly
• Inability to set or recall memory settings for door locks
• Intermittent or complete failure of the door lock system
• Warning lights illuminated on the dashboard

DTC B1392 causes

Several factors can lead to the occurrence of DTC B1392, including:

• Faulty power door memory lock relay
• Wiring issues, such as shorts or open circuits
• Corroded or loose electrical connections
• Defective body control module (BCM)
• Software glitches in the vehicle’s control systems

DTC B1392 seriousness

The seriousness of DTC B1392 can vary. While it may not pose an immediate safety risk, it can lead to inconvenience and potential security issues if the door locks fail to operate correctly. It is advisable to address this code promptly to ensure the proper functioning of the vehicle’s locking system.

How to diagnose DTC B1392

To diagnose DTC B1392, 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 wear.
3. Check the wiring and connectors associated with the relay for shorts or corrosion.
4. Test the relay operation using a multimeter to ensure it is functioning correctly.
5. Examine the body control module for any faults or software issues.
6. Clear the DTC and perform a road test to see if the code returns.

How to fix DTC B1392 step-by-step instructions

To fix DTC B1392, follow these steps:

1. Replace the faulty power door memory lock relay if it is defective.
2. Repair or replace any damaged wiring or connectors found during inspection.
3. Ensure all electrical connections are clean and secure.
4. If the body control module is faulty, consider reprogramming or replacing it.
5. After repairs, clear the DTC using an OBD-II scanner.
6. Test the door lock system to confirm proper operation.

How to erase DTC B1392

To erase DTC B1392, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the diagnostic menu on the scanner and select the option to clear or erase DTCs.
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 return.

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