B1392 Code Meaning, Symptoms, Causes and How to Fix

The B1392 code indicates a failure in the Power Door Memory Lock Relay Circuit. This can be caused by a faulty Power Door Memory Lock Relay, a damaged or shorted relay harness, a poor electrical connection in the circuit, or a malfunctioning Body Control Module (BCM).

Symptoms of this code may include the Engine Light turning on and other related issues.

To fix this problem, it is recommended to consult a professional for proper diagnosis and repair.

What does it mean

The B1392 code indicates a problem with the Power Door Memory Lock Relay Circuit. This can lead to unreliable or non-functional power door locks, compromising security.

Regularly inspect wiring harnesses and connectors for damage to prevent failures. Seek professional assistance for diagnosis and repairs to ensure proper resolution of the issue.

what are the symptoms

The symptoms of the B1392 code include an illuminated Engine Light or Service Engine Soon Warning Light. Other potential symptoms may also be present.

Here are four common signs that indicate a failing Power Door Memory Lock Relay:

1. Power door locks not working: If the Power Door Memory Lock Relay is faulty, the power door locks may not function properly. They may fail to lock or unlock when the button is pressed.
2. Inconsistent door locking: The doors may lock and unlock intermittently on their own without any input from the driver or passengers. This is another sign of a potential problem with the relay.
3. Unresponsive door lock buttons: The door lock buttons on the inside or outside of the vehicle may become unresponsive. This can make it difficult to manually lock or unlock the doors.
4. Battery drain: A failing Power Door Memory Lock Relay can cause excessive battery drain. If you notice that your battery is constantly running low or dying, it could be due to this relay malfunctioning.

To prevent the DTC B1392 code from occurring, it is recommended to regularly check the power door lock system. Inspect the wiring harness and connectors for any signs of damage or corrosion. Also, be careful when operating the power door locks to avoid putting unnecessary strain on the relay.

What are the causes

Possible causes of the B1392 code are:

1. Faulty Power Door Memory Lock Relay: A relay that is not working properly can cause issues with the power door memory lock system.
2. Open or shorted Power Door Memory Lock Relay harness: Damage or a break in the wiring harness can disrupt the flow of electrical signals to the relay.
3. Poor electrical connection in the Power Door Memory Lock Relay circuit: Loose or corroded connections can result in intermittent or complete failure of the relay system.
4. Faulty Body Control Module (BCM): The BCM controls various electrical functions in the vehicle, including the power door memory lock system. A faulty BCM can trigger the B1392 code.

To troubleshoot the B1392 code, you can:

• visually inspect the wiring harness and connectors for any damage
• check for broken or corroded connector pins
• seek professional help if needed
• regularly inspect and maintain the electrical connections to prevent Power Door Memory Lock Relay failures
• keep the connections clean and secure.

What Tools are Needed to diagnose

To diagnose the B1392 code, you will need to use diagnostic tools. Here are four common tools that may be necessary for the diagnosis:

1. OBD-II Scanner: This tool is important for reading and retrieving the B1392 code from the vehicle's computer system. It provides information about the specific fault and helps determine the necessary troubleshooting steps.
2. Multimeter: A multimeter is used to measure voltage, resistance, and continuity in the electrical circuits related to the Power Door Memory Lock Relay. It helps identify any open or shorted circuits and faulty components.
3. Wiring Diagrams: Accurate wiring diagrams are essential for tracing the circuit and locating potential issues. These diagrams provide information on wire colors, connector pinouts, and component locations.
4. Professional Assistance: In complex cases involving electrical systems or specialized equipment, it may be necessary to seek professional help. A trained technician can provide expertise and guidance for efficiently diagnosing and repairing the B1392 code.

How to fix Step by Step

Step 1: Begin by checking the possible causes mentioned earlier, such as a faulty Power Door Memory Lock Relay, open or shorted relay harness, poor electrical connection, or a faulty Body Control Module (BCM).

Step 2: Conduct a visual inspection of the wiring harness and connectors to identify any damage. Pay close attention to broken, bent, pushed out, or corroded connector pins.

Step 3: Avoid common mistakes when diagnosing the B1392 code, such as overlooking visual inspection or not seeking professional assistance when needed.

Step 4: Consult factory service manuals, search for specific information on Hyundai and KIA vehicles, and utilize resources like repair shops and automotive assistance websites for troubleshooting tips on the B1392 code.

What are the Common Diagnosis Mistakes

Common Diagnosis Mistakes

One common mistake in diagnosing the B1392 code is not thoroughly inspecting the wiring harness and connectors. It is important to visually examine these components to identify any potential issues, such as damaged or loose connections, worn-out wires, or corroded pins. Neglecting this inspection can result in overlooking important information, which can lead to incorrect diagnosis and unnecessary repairs.

To avoid these common diagnostic errors and effectively troubleshoot the B1392 code, here are some tips:

1. Carefully inspect the wiring harness and connectors for any signs of damage or corrosion.
2. Use a multimeter to test the power and ground signals at the Power Door Memory Lock Relay.
3. Check the Body Control Module (BCM) for any faults or malfunctions that may affect the circuit.
4. Refer to the vehicle's repair manual or seek professional assistance if needed.

What is the Repair Cost

The repair cost for the B1392 code varies based on factors like location, labor rates, vehicle make and model, and engine type.

Diagnosis typically includes 1.0 hour of labor, with rates ranging from $75 to $150 per hour.

To accurately diagnose the code, visual inspection of wiring and connectors, checking for damaged components, and seeking professional assistance is crucial.

Can I drive safely with this code?

Driving with the B1392 code can be unsafe. It indicates a Power Door Memory Lock Relay Circuit Failure, potentially causing engine light issues and other symptoms.

Inspect wiring and connectors for damage and check for bent or corroded pins.

Seek professional help for diagnosis and repair to ensure safe driving conditions and prevent further damage.

Conclusion

In conclusion, the B1392 code indicates a Power Door Memory Lock Relay Circuit Failure in Hyundai and KIA vehicles. This code can be triggered by various factors such as a faulty relay, wiring issues, or a faulty BCM.

Symptoms may include an illuminated Engine Light and other potential issues.

It is recommended to visually inspect the wiring and connectors, check for damaged components, and seek professional assistance for further diagnosis and repair.