The Seasoned Wrench

,

Harley Code B1318: Troubleshooting Tips for Harley-Davidson Riders

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, you may come across the B1318 code at some point. This code is related to the passenger seatbelt circuit and can affect the safety features of your vehicle. It is important to address this issue promptly to ensure the safety of yourself and your passengers.

When the B1318 code appears on your Harley-Davidson, it indicates that there is a problem with the passenger seatbelt circuit. This can affect the airbags and seatbelt pre-tensioners, which can put occupants at risk in the event of an accident. The severity of the problem can vary, but it is important to address the issue as soon as possible to ensure the safety of your vehicle.

Fortunately, there are ways to fix the B1318 code and restore the safety features of your Harley-Davidson. By using a diagnostic tool or following the steps outlined in the search results, you can read the DTC codes and identify the source of the problem. From there, you can take the necessary steps to fix the issue and ensure the safety of your vehicle.

Understanding Harley Code B1318

If you own a Harley-Davidson motorcycle, you may have come across the B1318 code. This code indicates that the battery voltage is low and it is usually caused by a problem with the control module.

Symptoms of B1318

The symptoms of B1318 can vary depending on the severity of the problem. Some common symptoms include:

If you are experiencing any of these symptoms, it is important to have your motorcycle checked by a professional to determine the cause of the problem.

Potential Causes

There are several potential causes of the B1318 code, including:

  • A faulty battery
  • A faulty control module
  • A problem with the ignition switch
  • Loose or corroded battery cables

If you suspect that your battery is the problem, you can test it using a multimeter. If the battery is not the issue, you may need to have your control module or ignition switch checked by a professional.

In some cases, the problem may be as simple as loose or corroded battery cables. If this is the case, you can clean the cables and tighten them to see if that resolves the issue.

Overall, if you are experiencing the symptoms of the B1318 code, it is important to have your motorcycle checked by a professional to determine the cause of the problem and prevent further damage to your motorcycle.

Diagnostic Trouble Codes (DTCs) and Harley

Harley-Davidson motorcycles are equipped with an onboard diagnostic system that monitors various systems and components for malfunctions. When the system detects a problem, it generates a Diagnostic Trouble Code (DTC), which is a unique alphanumeric code that corresponds to a specific fault condition. The DTC can be read using a diagnostic tool or by following a specific procedure using the trip reset button.

Common Harley DTCs

Harley-Davidson motorcycles can generate a wide range of DTCs depending on the model and year of the bike. Some of the most common DTCs that you may encounter on your Harley include:

  • P0107: MAP sensor circuit low input
  • P0118: Engine coolant temperature sensor circuit high input
  • P0131: Front oxygen sensor circuit low input
  • P0151: Rear oxygen sensor circuit low input
  • B1318: LHCM right button stuck

Interpreting DTCs

Interpreting DTCs can be a bit tricky, as each code corresponds to a specific fault condition that may have multiple possible causes. However, by using a diagnostic tool or following the correct procedure to read the code, you can get a better idea of what may be causing the problem.

When you encounter a DTC on your Harley, the first step is to look up the code in the service manual or online to find out what it means. Once you know the meaning of the code, you can start troubleshooting the system or component that is associated with the code.

It’s also important to note that not all DTCs are created equal. Some codes may be more serious than others, and some may require immediate attention to prevent further damage or safety hazards. Therefore, it’s important to take DTCs seriously and address them promptly to ensure the safe and reliable operation of your Harley-Davidson motorcycle.

In conclusion, understanding DTCs and how to interpret them is an essential part of maintaining and troubleshooting your Harley-Davidson motorcycle. By familiarizing yourself with common DTCs and following the correct procedure to read the codes, you can quickly diagnose and fix problems before they become more serious.

Harley Electrical System Basics

If you own a Harley-Davidson motorcycle, it’s important to understand the basics of the electrical system. The electrical system is responsible for powering everything from the lights to the ignition system, so it’s crucial that it’s kept in good condition. In this section, we’ll cover the basics of the Harley electrical system, including battery maintenance and the ignition system overview.

Battery Maintenance

The battery is the heart of the electrical system, and it’s important to keep it in good condition. You should check the battery regularly to make sure it’s charged and free of corrosion. If you notice any signs of corrosion, you can clean it with a mixture of baking soda and water. It’s also a good idea to check the battery’s voltage regularly to make sure it’s within the recommended range.

Ignition System Overview

The ignition system is responsible for starting the engine, and it’s made up of several components, including the ignition switch, CAN, and ECU. The ignition switch is the key to starting the engine, and it sends a signal to the CAN, which then communicates with the ECU to start the engine.

It’s important to make sure the ignition system is in good condition, as any problems can prevent the engine from starting. If you notice any issues with the ignition system, it’s important to have it checked by a professional.

Overall, keeping your Harley’s electrical system in good condition is crucial for the performance and longevity of your motorcycle. By following these basic maintenance tips, you can ensure that your Harley’s electrical system is in top condition and ready to hit the road.

Harley Control Modules

Harley Davidson motorcycles are equipped with various control modules that are responsible for managing different functions of the bike. These modules use sensors and other inputs to make real-time decisions and adjust the performance of the motorcycle accordingly.

Body Control Module (BCM)

The Body Control Module (BCM) is responsible for managing various electrical systems of the motorcycle, such as lighting, horn, turn signals, and others. It uses inputs from various sensors to make decisions and adjust the performance of these systems. The BCM is also responsible for storing diagnostic trouble codes (DTCs) that can help in identifying any issues with the electrical systems.

If you encounter the Harley code B1318, it indicates that the left-hand control module (LHCM) right button is stuck. This code is stored in the BCM and can be accessed using onboard diagnostics. To fix this issue, you may need to replace the LHCM or repair the button.

Engine Control Unit (ECU)

The Engine Control Unit (ECU) is responsible for managing the performance of the motorcycle’s engine. It uses inputs from various sensors, such as the throttle position sensor and the oxygen sensor, to adjust the fuel injection and ignition timing. The ECU is also responsible for storing diagnostic trouble codes (DTCs) that can help in identifying any issues with the engine performance.

If you encounter any issues with the engine performance, such as poor acceleration or misfiring, you may need to check the DTCs stored in the ECU. These codes can help in identifying the root cause of the issue and guide you in fixing it.

In conclusion, the control modules of Harley Davidson motorcycles play a crucial role in managing the performance of various systems. By understanding how these modules work and accessing the diagnostic trouble codes stored in them, you can identify and fix any issues with your motorcycle’s performance.

Troubleshooting and Repair

If you are experiencing trouble with your Harley and have received the B1318 trouble code, it is important to troubleshoot and repair the issue as soon as possible. Below are some steps to take to troubleshoot and repair the issue.

Step-by-Step Troubleshooting

  1. Check the Battery: The first step in troubleshooting the B1318 trouble code is to check the battery. Make sure the battery is fully charged and in good condition. If the battery is not in good condition, replace it.

  2. Check the Control Module: The next step is to check the control module. Make sure the control module is functioning properly. If there are any issues with the control module, replace it.

  3. Check the Ignition Switch: The ignition switch can also cause the B1318 trouble code. Make sure the ignition switch is functioning properly. If there are any issues with the ignition switch, replace it.

Repair Solutions

Once you have identified the issue, it is time to repair it. Below are some repair solutions for the B1318 trouble code.

  1. Replace the Battery: If the battery is not in good condition, replace it. A faulty battery can cause a number of issues, including the B1318 trouble code.

  2. Replace the Control Module: If there are any issues with the control module, replace it. The control module is responsible for a number of functions, including the ignition system and the fuel system.

  3. Replace the Ignition Switch: If there are any issues with the ignition switch, replace it. The ignition switch is responsible for starting the engine and powering the electrical system.

By following these steps, you can troubleshoot and repair the B1318 trouble code on your Harley. Remember, it is important to address the issue as soon as possible to avoid further damage to your motorcycle.

Maintenance Tips for Longevity

Regular Check-Ups

Regular check-ups are essential for ensuring the longevity of your Harley motorcycle. You should take your bike to a certified mechanic at least once a year, or after every 5,000 miles, whichever comes first. During the check-up, the mechanic will inspect your bike’s battery, control module, and ignition system for any signs of wear and tear.

The battery is one of the most critical components of your Harley motorcycle. You should check the battery’s terminals and cables for any signs of corrosion or damage regularly. If you notice any corrosion, use a wire brush to clean the terminals and cables. You should also check the battery’s water levels and top it up if needed.

The control module is responsible for managing your Harley’s electrical systems. If the control module fails, your bike may not start, or it may stall while you’re riding. During the check-up, the mechanic will inspect the control module for any signs of damage or malfunction. If they find any issues, they will replace the control module with a new one.

Battery Care

Taking care of your Harley’s battery is essential for ensuring its longevity. Here are some tips to help you take care of your battery:

  • Keep the battery clean and dry. If you ride your bike in wet conditions, dry the battery with a towel after each ride.
  • Check the battery’s water levels regularly. If the water levels are low, top up the battery with distilled water.
  • Use a battery tender if you’re not going to ride your bike for an extended period. A battery tender will keep your battery charged and prevent it from discharging.

By following these maintenance tips, you can ensure that your Harley motorcycle stays in top condition for years to come.

Advanced Harley Diagnostics

Using Diagnostic Tools

When it comes to advanced Harley diagnostics, using diagnostic tools is the best way to go. These tools help you to read the Diagnostic Trouble Codes (DTCs) generated by the motorcycle’s onboard diagnostic system (OBD) and identify the malfunctioning sensors, circuits, or components. You can use tools like the Digital Technician II (DTII) or the Harley-Davidson Smart Security System (H-DSSS) to diagnose your Harley.

Understanding Advanced DTCs

The B1318 code is a specific DTC that relates to the Left Hand Control Module (LHCM) right button stuck. It typically indicates that the right button on the LHCM is stuck and needs to be addressed. The LHCM is a component of the Body Control Module (BCM) and is responsible for controlling the functions of the left-hand controls.

When you encounter the B1318 code, it is important to diagnose the issue properly to avoid further damage to your Harley. You can use diagnostic tools to read the code and identify the root cause of the problem. Once you have identified the issue, you can repair or replace the faulty component to resolve the issue.

In conclusion, using diagnostic tools is the best way to diagnose advanced DTCs like the B1318 code. These tools help you to identify the root cause of the problem and take the necessary steps to repair or replace the faulty component. With the right diagnostic tools and knowledge, you can keep your Harley running smoothly and avoid costly repairs in the future.

Harley-Davidson Model Specifics

When it comes to Harley-Davidson motorcycles, each model has a unique set of specifications and codes that identify it. In this section, we will explore the model variations and codes, as well as VIN identification.

Model Variations and Codes

Harley-Davidson motorcycles have a variety of model variations, each with its own set of codes. These codes can be used to identify the model, year, and engine type of the motorcycle. One example of a Harley-Davidson code is B1318, which is related to the Body Control Module (BCM) of the motorcycle.

The B1318 code refers to the left-hand control module’s right button being stuck. This can cause issues with the motorcycle’s electrical system, such as the turn signals or horn not working correctly. If you encounter this code, it is recommended that you take your motorcycle to a certified Harley-Davidson technician to have it inspected and repaired.

VIN Identification

The Vehicle Identification Number (VIN) of a Harley-Davidson motorcycle is a unique code that can be used to identify the model, year, and engine type of the motorcycle. The VIN is typically located on the frame of the motorcycle, near the front forks.

The VIN of a Harley-Davidson motorcycle consists of 17 characters, which are a combination of letters and numbers. The first three characters of the VIN indicate the manufacturer and country of origin. The next six characters indicate the model, engine type, and body style of the motorcycle. The ninth character is a check digit that is used to verify the validity of the VIN. The tenth character indicates the year of manufacture, while the eleventh character indicates the plant where the motorcycle was manufactured.

In conclusion, understanding the model variations and codes, as well as the VIN identification, is essential for Harley-Davidson motorcycle owners. Knowing this information can help you identify issues with your motorcycle and ensure that it is properly maintained.

In:

,