The Seasoned Wrench

,

Harley Code B1347: What It Means and How to Fix It

by

Chase Manhattan

Chase Manhattan Avatar
Owner and Editor at The Wrench Network

Last Updated:

Hey y’all, it’s Chase Manhattan! I’m a life-long automotive and motorcycle enthusiast with a knack for diagnostics that I hope to share with you! Lately, I’ve been running my own motorcycle rental business, which you can read about here, and it has been a great experience that has allowed me to own numerous bikes that I probably couldn’t justify otherwise. Plus, it’s been a great way to experience new places while on vacation. If you haven’t heard of them before, I definitely recommend checking out the Riders-Share platform if you get the itch to ride while away from home, or if you want to explore a cheaper way to own and ride motorcycles!

Note: My posts may contain affiliate links. If you click on these links and make a purchase, I may receive a small commission at no extra cost to you. I only recommend products I genuinely believe in. Thanks for supporting The Seasoned Wrench!

Read my full affiliate disclaimer >>

If you own a Harley-Davidson motorcycle and have recently received a B1347 error code, you may be wondering what it means and how to fix it. This error code specifically refers to the driver front airbag resistance being too low. While this may seem like a serious issue, it is actually a relatively common problem that can be fixed by a qualified mechanic.

To diagnose the B1347 code, it typically requires about one hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour. Once the issue has been identified, the mechanic will be able to provide you with an estimate for the cost of repairs.

If you are experiencing the B1347 error code on your Harley-Davidson motorcycle, it is important to have it addressed as soon as possible. Not only can this issue prevent your airbag from functioning properly in the event of an accident, but it may also cause other problems with your vehicle. By taking your motorcycle to a qualified mechanic, you can ensure that the issue is properly diagnosed and repaired, allowing you to get back on the road with confidence.

Understanding Harley Code B1347

If you own a Harley Davidson motorcycle, you might have come across the B1347 code. This code indicates a problem with the driver front airbag resistance being too low. In this section, we will help you understand the significance of the B1347 code and the common symptoms associated with it.

Significance of B1347

The B1347 code is a LHCM (Left Hand Control Module) internal error or an RHCM (Right Hand Control Module) internal error. It can also indicate an IM (Instrument Module) internal fault. The LHCM and RHCM are responsible for controlling various functions on your motorcycle, including the airbag system. The IM is the module that displays information on your motorcycle’s instrument panel.

When the LHCM, RHCM, or IM detects an internal fault, it will trigger the B1347 code. This code indicates that there is a problem with the driver front airbag resistance being too low. The airbag system is an essential safety feature on your motorcycle, and any issues with it should be addressed immediately.

Common Symptoms

If your motorcycle is displaying the B1347 code, you might notice some common symptoms. These symptoms can include:

  • The airbag warning light is illuminated on your instrument panel.
  • The airbag system is not working correctly, and the airbags might not deploy in the event of an accident.
  • You might hear a chime or beep when the code is triggered.

If you notice any of these symptoms, you should take your motorcycle to a qualified technician as soon as possible. They will be able to diagnose the issue and make any necessary repairs to ensure that your motorcycle’s airbag system is working correctly.

In conclusion, the B1347 code is a LHCM or RHCM internal error or an IM internal fault that indicates a problem with the driver front airbag resistance being too low. If you notice any common symptoms associated with this code, you should take your motorcycle to a qualified technician immediately. They will be able to diagnose the issue and make any necessary repairs to ensure that your motorcycle’s airbag system is working correctly.

Electrical System Fundamentals

When it comes to the electrical system of your Harley, there are a few basics you should understand. This knowledge will help you better diagnose and fix issues with your bike.

Battery and Ignition Basics

The battery is a crucial component of your Harley’s electrical system. It provides power to start the engine and keeps the lights and other electronics running while you ride. If your battery is weak or dead, your bike won’t start or may stall while riding. To ensure your battery stays healthy, you should keep it charged and replace it when it starts to lose its ability to hold a charge.

The ignition system is responsible for starting the engine. It consists of the battery, starter motor, and spark plugs. When you turn the key, the starter motor spins the engine until it fires up. The spark plugs ignite the fuel in the cylinders, which keeps the engine running. If your ignition system is faulty, your bike won’t start or may run poorly.

The CAN System

The CAN (Controller Area Network) system is a network of sensors and modules that communicate with each other to control various functions of your Harley. It allows different parts of your bike to talk to each other and work together. The CAN system includes the engine control module, instrument cluster, ABS module, and other modules.

If you’re experiencing issues with your Harley’s electrical system, it’s important to understand the basics of how it works. By knowing how the battery, ignition, and CAN system function, you’ll be better equipped to diagnose and fix any problems that arise.

Harley Control Modules

Harley motorcycles are equipped with various control modules that monitor and control different systems in the bike. Two of the most important control modules are the Body Control Module (BCM) and the Engine Control Unit (ECU).

Body Control Module (BCM)

The BCM is responsible for controlling various electrical systems in the bike, including lighting, audio, and security. It communicates with other control modules in the bike through a network called the Harley-Davidson Diagnostic Communication (HDDC) network.

If you encounter a B1347 error code, it means that there is a short circuit in the front right speaker circuit. This error code is stored in the BCM’s memory, and can be retrieved using a diagnostic tool.

Engine Control Unit (ECU)

The ECU is responsible for controlling the engine’s fuel injection, ignition timing, and other parameters. It communicates with sensors and actuators in the engine through a network called the Controller Area Network (CAN).

If you encounter a B2102, B2103, or B2104 error code, it means that there is a problem with the ECU’s communication with other control modules in the bike. These error codes can be retrieved using a diagnostic tool, and may indicate a problem with the HDDC network.

To troubleshoot these error codes, you should consult your Harley-Davidson owner’s manual and follow the recommended diagnostic procedures. If you are not comfortable working on your bike’s electrical systems, it is recommended that you take it to a certified Harley-Davidson technician for diagnosis and repair.

Remember to always wear appropriate safety gear when working on your motorcycle, and follow all recommended safety procedures.

Diagnostic Trouble Codes

When your Harley-Davidson motorcycle’s self-diagnostic system detects a malfunction, it will generate a Diagnostic Trouble Code (DTC). These codes help you identify the specific problem that your motorcycle is experiencing. By understanding the DTCs, you can diagnose and fix the issue and keep your bike running smoothly.

DTCs Related to B1347

B1347 is a DTC that indicates a fault in the front right speaker circuit. Other DTCs that are related to B1347 include:

  • B1103: Front turn signal bulb short to ground
  • B1153: Side stand switch short to ground
  • B1200: Fuel sender open/high
  • B1338: Fuel sender short to ground
  • B1342: ECU ground open/high
  • B1346: Front left speaker short to ground
  • B1350: Rear speaker short to ground
  • B2112: Fuel sender open/low
  • B2113: Fuel sender short to battery
  • B2114: Fuel sender short to ground

If you encounter any of these DTCs, you should take the necessary steps to diagnose and fix the problem. For example, if you see the B1347 code, you should check the front right speaker circuit for any signs of damage or wear. You can also read the DTC codes on a Harley-Davidson without a diagnostic tool by using the trip reset button.

It’s important to note that different DTCs may require different diagnostic procedures. If you’re not sure how to diagnose and fix a particular DTC, you should consult your Harley-Davidson service manual or take your bike to a qualified technician.

In summary, understanding the DTCs that your Harley-Davidson motorcycle generates can help you diagnose and fix any issues that your bike may be experiencing. By taking the necessary steps to address these problems, you can keep your motorcycle running smoothly and enjoy the ride.

Troubleshooting Electrical Issues

If you are experiencing electrical issues with your Harley, there are some things you can do to troubleshoot the problem. Here are some common issues and how to fix them.

Shorts and Faults

Shorts and faults can be caused by a variety of things. One common issue is a fuel level sender that is shorted low or open. This can cause the fuel signal to be low or high, which can affect the performance of your bike. To fix this issue, you may need to replace the fuel level sender.

Another common issue is a radio voltage that is too high or too low. This can be caused by a faulty radio or a problem with the electrical system. To fix this issue, you may need to replace the radio or have a professional diagnose and repair the electrical system.

Signal and Voltage Irregularities

Signal and voltage irregularities can also cause problems with your Harley. One common issue is a faulty ECM, which can cause a variety of problems including poor fuel economy, rough idle, and reduced power. To fix this issue, you may need to replace the ECM.

Another common issue is a P0134 code, which indicates a problem with the oxygen sensor circuit. This can cause a variety of problems including poor fuel economy and reduced power. To fix this issue, you may need to replace the oxygen sensor.

Overall, if you are experiencing electrical issues with your Harley, it is important to diagnose and fix the problem as soon as possible. By troubleshooting the issue and identifying the root cause, you can ensure that your bike is running smoothly and safely.

Repair and Maintenance Tips

Preventive Measures

To avoid encountering the B1347 code on your Harley-Davidson, it is essential to perform regular maintenance checks. Keep an eye on your bike’s battery voltage and ensure it’s at least 12.5 volts. Check the fuses for the BCM and make sure they’re not blown. Moreover, inspect the connections to the BCM and make sure they’re clean and tight.

Common Fixes

If you encounter the B1347 code, there are a few things you can do to fix it. First, check the possible causes listed above. Visually inspect the related wiring harness and connectors. Ensure the driver front airbag resistance is not too low. If it is, you may need to replace the driver front airbag.

Another common fix is to check the brake lamp output. If it’s open or shorted low, you may need to replace the brake lamp output. Similarly, if the acc output is shorted high or overloaded, you may need to replace the BCM.

It’s essential to note that diagnosing and fixing the B1347 code may require an hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. So, it’s best to consult a professional mechanic for accurate diagnosis and repair.

In conclusion, regular maintenance checks, including inspecting the battery voltage, fuses, and connections to the BCM, can help prevent the B1347 code. However, if you encounter it, inspect the driver front airbag resistance, brake lamp output, and acc output. Consult a professional mechanic for accurate diagnosis and repair.

Advanced Diagnostics

If you are experiencing Harley code B1347, it is important to utilize advanced diagnostic tools to accurately diagnose and fix the issue. This will help you avoid costly repairs and ensure that your motorcycle is running smoothly.

Utilizing Advanced Diagnostic Tools

To diagnose Harley code B1347, you will need to use advanced diagnostic tools such as a Harley-Davidson Digital Technician (HDDT) or a Harley-Davidson Smart Security System (H-DSSS). These tools will allow you to access the motorcycle’s onboard computer and retrieve advanced diagnostic trouble codes (DTCs).

Once you have retrieved the advanced DTCs, you can use the diagnostic trouble code chart to interpret the codes and diagnose the issue. This will help you determine the root cause of the problem and take the necessary steps to fix it.

Interpreting Advanced DTCs

When interpreting advanced DTCs, it is important to pay attention to the specific code and its corresponding description. For Harley code B1347, the code indicates that the driver front airbag resistance is too low. This could be caused by a number of issues, such as a faulty airbag sensor or a wiring issue.

Other advanced DTCs that may be relevant to Harley code B1347 include:

  • B1210: Front Right Turn Signal Output Short to Ground
  • B1211: Front Right Turn Signal Output Short to Battery
  • B1212: Front Left Turn Signal Output Short to Ground
  • B1213: Front Left Turn Signal Output Short to Battery
  • B1300: Ignition Switch Low/Open
  • B1301: Ignition Switch High/Shorted
  • B1302: Battery Voltage Low
  • B1303: Battery Voltage High
  • B1304: Starter Relay Low/Open
  • B1305: Starter Relay High/Shorted
  • B1306: Engine Stop Switch Low/Open
  • B1309: TSM/TSSM/HFSM Serial Data Low
  • B1310: TSM/TSSM/HFSM Serial Data High
  • B1312: Battery Voltage Low (Ignition ON)
  • B1313: Battery Voltage High (Ignition ON)
  • B1314: Battery Voltage Low (Ignition OFF)
  • B1315: Battery Voltage High (Ignition OFF)
  • B1316: Fuel Sending Unit Data Error
  • B1317: Fuel Sending Unit Data Error
  • B1318: Fuel Sending Unit Data Error

By understanding these advanced DTCs and their corresponding descriptions, you can more easily diagnose issues with your motorcycle and take the necessary steps to fix them.

In conclusion, utilizing advanced diagnostic tools and interpreting advanced DTCs is crucial for diagnosing and fixing Harley code B1347 and other related issues. By doing so, you can ensure that your motorcycle is running smoothly and avoid costly repairs in the future.

Harley-Davidson User Interface

When it comes to the user interface of your Harley-Davidson, there are a few key components that you should be familiar with. These include the Handlebar Control Module (HCM) and the radio and audio controls.

Handlebar Control Module (HCM)

The HCM is located on the left side of the handlebar and is responsible for controlling a variety of functions on your Harley-Davidson. These include the turn signals, horn, high beam, and low beam headlights, and the cruise control.

If you are experiencing issues with the HCM, such as buttons that are stuck or not working properly, it could be due to a fault code such as B1347, which indicates that the front right speaker is shorted low.

Radio and Audio Controls

The radio and audio controls are located on the faceplate of your Harley-Davidson’s radio. These controls allow you to adjust the volume, change the station, and access other audio features.

If you are experiencing issues with the radio and audio controls, it could be due to a fault code such as B1347, which indicates that the front right speaker is shorted low.

Other fault codes that may be related to the radio and audio controls include B1348, which indicates that the front right speaker is shorted high, and B1349, which indicates that the front left speaker is shorted low.

If you are experiencing any of these issues with your Harley-Davidson, it is important to have them diagnosed and repaired by a qualified technician.

In:

,