The B1397 code is a diagnostic trouble code (DTC) commonly found in vehicles. It relates to the Power Door Unlock circuit and is triggered when there is a short to battery in the circuit, causing it to deviate from the factory specifications.
Symptoms of the B1397 code may include issues with the power door unlock function, such as the doors failing to unlock or intermittent unlocking. Additionally, the code may trigger a warning light on the dashboard.
There are several potential causes for the B1397 code, including a faulty Power Door Unlock component or a poor electrical connection within the circuit. It is recommended to seek professional assistance to accurately diagnose and repair this code.
To fix the B1397 code, a technician will typically perform the following steps:
- Use a diagnostic scanner to retrieve the trouble code and identify the specific issue.
- Inspect the Power Door Unlock component for any signs of damage or malfunction.
- Check the electrical connections within the circuit for any loose or corroded wires.
- Repair or replace any faulty components or wiring as necessary.
- Clear the code from the vehicle's memory using the diagnostic scanner.
- Test the power door unlock function to ensure it is functioning properly.
It is important to address the B1397 code promptly to ensure the proper functioning of the power door unlock system and to avoid any inconvenience or safety issues associated with the malfunctioning doors.
What does it mean
The B1397 code indicates a fault in the Power Door Unlock circuit monitored by the BCM.
Ignoring this code can lead to further damage and malfunctions.
Prompt diagnosis and repair are recommended to ensure proper functioning.
Consult a professional and reliable resources for more information and guidance on resolving the B1397 code.
what are the symptoms
The symptoms of the B1397 code can vary depending on the specific vehicle. It is important to pay attention to any abnormal behavior or malfunctions that may be present. Here are four possible symptoms that may indicate the presence of the B1397 code:
- The engine light or Service Engine Soon warning light may be illuminated.
- The power doors may not unlock properly or may not respond at all.
- There may be other electrical issues in the vehicle, such as malfunctioning windows or interior lights.
- The vehicle may experience intermittent or constant battery drain.
To diagnose the B1397 code, it typically takes about 1.0 hour of labor. However, the actual time may vary depending on factors such as the location, make, model, and engine type of the vehicle. It is crucial to address the symptoms promptly to prevent further damage and ensure proper functioning. Seeking professional assistance is recommended to accurately diagnose and repair the issue.
What are the causes
Possible causes of the B1397 code include:
- Faulty Power Door Unlock: If there is a problem with the power door unlock mechanism, it can trigger the B1397 code.
- Open or Shorted Power Door Unlock Harness: If the wiring harness responsible for the power door unlock system is open or shorted, it can lead to the B1397 code.
- Poor Electrical Connection: A loose or corroded connection in the power door unlock circuit can cause the B1397 code.
- Faulty Body Control Module (BCM): The BCM, which monitors the power door unlock system, can be faulty and trigger the B1397 code.
Common diagnosis mistakes for the B1397 code include:
- Not checking for loose connections.
- Not thoroughly inspecting the power door unlock harness for damage.
- Not considering the possibility of a faulty BCM.
It is important to conduct a comprehensive diagnosis to accurately identify the cause of the B1397 code.
What Tools are Needed to diagnose
To diagnose the B1397 code, you will need specific tools. Here are some common tools used for diagnosing the B1397 code:
- OBD-II scanner: This tool retrieves the trouble codes stored in the vehicle's computer system, providing valuable information about the specific issue causing the B1397 code.
- Multimeter: A multimeter is essential for testing the Power Door Unlock circuit for a short to the battery. It allows technicians to measure voltage, resistance, and continuity, helping them identify any electrical problems.
- Wiring diagram: A wiring diagram is necessary to locate the Power Door Unlock circuit and understand its connections. This helps in identifying any open or shorted wires, as well as poor electrical connections.
- Inspection light: An inspection light or flashlight is useful for visually inspecting the wiring harness and connectors. It helps technicians identify any damaged components, broken or corroded connector pins, or other visible issues.
How to fix Step by Step
Step 1: Begin by conducting a thorough inspection and testing of the vehicle using the necessary tools to address the B1397 code and resolve the issue.
Step 2: Check the power door unlock circuit for any open or shorted wiring harness, poor electrical connections, or damaged components as common troubleshooting techniques for the B1397 code.
Step 3: Visually inspect the related wiring harness and connectors, looking for any signs of damage such as broken, bent, pushed out, or corroded connector pins.
Step 4: Seek professional assistance if needed, as the diagnosis and repair process may require specialized knowledge and equipment.
Step 5: Promptly diagnose and repair the issue to prevent further damage and ensure the proper functioning of the power door unlock circuit.
What are the Common Diagnosis Mistakes
Common Diagnosis Mistakes
One mistake that is commonly made when diagnosing the B1397 code is not considering potential problems with the power door unlock circuit. It is important to avoid common errors and misunderstandings about the B1397 code in order to accurately identify and resolve the issue.
Here are a few common mistakes to be aware of:
- Only focusing on the Body Control Module (BCM) and not thoroughly inspecting the power door unlock circuit.
- Neglecting to visually check the wiring harness and connectors for any signs of damage or poor electrical connections.
- Failing to inspect the connector pins for any breakage, bending, displacement, or corrosion, as these can lead to problems with the power door unlock circuit.
- Not seeking professional help when necessary, especially if the diagnosis becomes complex or the repairs are beyond your expertise.
What is the Repair Cost
The cost of repairing the B1397 code can vary based on factors like location, make, model, and engine type. Labor rates typically range between $75 and $150 per hour. Additional charges for parts and further repairs may apply.
Seeking professional assistance is recommended for accurate diagnosis and repair. Regular maintenance and inspection of the power door unlock system can help prevent code recurrence.
Can I drive safely with this code?
Driving safely with the B1397 code is not recommended as it may lead to further damage and malfunctions in the power door unlock system.
Promptly addressing the code is crucial to ensure proper functioning.
If you have the necessary knowledge, you can attempt to diagnose the issue yourself by inspecting the wiring harness and connectors.
However, seeking professional assistance is advised if you are unsure or lack expertise.
Conclusion
In conclusion, the B1397 code indicates a problem with the Power Door Unlock circuit in a vehicle. This can lead to abnormal vehicle behavior and potential damage to the Body Control Module.
It is important to address this issue promptly and seek professional assistance for diagnosis and repair. The cost of fixing the code will vary depending on the specific cause.
It is not recommended to drive the vehicle with this code present as it may compromise safety and further damage the vehicle.