If you own a Harley-Davidson motorcycle, you may have come across the code 81308 at some point. This code refers to a fault with the rear audio control diagnostics, specifically the rear volume up button being stuck. While it may seem like a minor issue, it can be frustrating if you’re trying to adjust the volume on your bike’s audio system.

Fortunately, there are ways to troubleshoot and fix this problem. One option is to try and manually release the button by gently pushing it in and out. If that doesn’t work, you may need to take your bike in for repairs or replace the faulty component. It’s important to address this issue as soon as possible, as it can impact the overall functionality of your bike’s audio system.

Overall, the code 81308 may seem like a small problem, but it’s important to address it promptly to ensure that your Harley-Davidson motorcycle is functioning properly. Whether you attempt to fix it yourself or take it to a professional, it’s worth taking the time to resolve this issue so you can enjoy your ride to the fullest.

Understanding Harley Codes

Diagnostic Trouble Code Basics

If you own a Harley-Davidson motorcycle, you might come across a diagnostic trouble code (DTC) at some point. A DTC is a code that gets stored in your bike’s computer when it detects a problem with one of its systems. These codes can be current, historic, or pending. Current codes indicate that there is a problem that needs to be addressed immediately, while historic codes indicate that there was a problem in the past that has since been resolved. Pending codes indicate that the bike has detected a problem but has not yet confirmed it.

Harley Code 81308 Specifics

Harley Code 81308 is a trouble code that relates to the throttle position sensor (TPS) and the electronic control module (ECM). The TPS is responsible for sending information to the ECM about the position of the throttle. If the TPS is not functioning properly, it can cause issues with the bike’s performance. The code 81308 indicates that there is a problem with the TPS or the wiring that connects it to the ECM.

If you are experiencing issues with your bike’s performance and suspect that the TPS is the culprit, you can check for DTCs using the diagnostic system. To do this, turn the ignition switch to the “On” position without starting the engine. Press and release the trip odometer trigger switch and wait for “diag” to appear on the odometer display. After “diag” displays, press and release the trip odometer trigger switch again to access any stored DTCs.

If you find that your bike has stored the code 81308, you may need to replace the TPS or repair any wiring issues. It’s always best to consult with a qualified Harley-Davidson technician to ensure that the problem is properly diagnosed and resolved.

Remember, DTCs are your bike’s way of communicating with you about any issues it may be experiencing. By understanding these codes and taking action when necessary, you can help keep your bike running smoothly and avoid any potential problems down the road.

Electrical Components

When it comes to Harley-Davidson motorcycles, the electrical components play a crucial role in keeping your ride running smoothly. In this section, we’ll take a closer look at the battery and ignition systems, as well as the Electronic Control Module (ECM) and Body Control Module (BCM).

Battery and Ignition Systems

The battery and ignition systems are responsible for starting your motorcycle and keeping it running. The battery provides the initial power to start the engine, while the ignition system provides the spark that ignites the fuel in the engine.

If you’re experiencing issues with your battery or ignition system, it’s important to have them checked by a professional. Faulty components can cause a range of issues, including difficulty starting your motorcycle and poor performance while riding.

Electronic Control Module (ECM)

The Electronic Control Module (ECM) is responsible for managing the engine’s performance and emissions. It receives signals from various sensors on the motorcycle and adjusts the fuel injection and ignition timing accordingly.

If you’re experiencing issues with your ECM, you may see error codes such as P0562, P0603, or P0605. These codes indicate issues with the ECM’s power supply, internal circuitry, or programming. If you see any of these codes, it’s important to have your motorcycle checked by a professional.

Body Control Module (BCM)

The Body Control Module (BCM) is responsible for managing various electrical components on the motorcycle, including the lights, horn, and turn signals. It receives signals from various switches and sensors on the motorcycle and controls the corresponding electrical components.

If you’re experiencing issues with your BCM, you may see issues with your lights, horn, or turn signals. It’s important to have your motorcycle checked by a professional if you’re experiencing any of these issues.

In summary, the electrical components on your Harley-Davidson motorcycle are crucial for keeping your ride running smoothly. If you’re experiencing any issues with your battery, ignition system, ECM, or BCM, it’s important to have them checked by a professional to ensure your safety and the longevity of your motorcycle.

Sensor Technology in Harley-Davidson

Harley-Davidson motorcycles are equipped with a variety of sensors that help monitor and control various aspects of the engine and its performance. These sensors are essential for ensuring that the engine runs smoothly and efficiently, and for detecting any issues or malfunctions that may arise.

Position and Speed Sensors

Position and speed sensors are some of the most critical sensors in a Harley-Davidson motorcycle. These sensors help determine the position and speed of various components in the engine, such as the crankshaft, camshaft, and pistons. The information provided by these sensors is used by the engine control module (ECM) to adjust the timing of the engine and ensure that it is running at optimal levels.

Some of the position and speed sensors used in Harley-Davidson motorcycles include the Engine Coolant Temperature (ECT) sensor, Engine Temperature (ET) sensor, Intake Air Temperature (IAT) sensor, and the Ignition Switch Sensor (ISS). These sensors help the ECM monitor the temperature and speed of the engine, which is crucial for maintaining proper engine performance.

Temperature and Oxygen Sensors

Temperature and oxygen sensors are also important sensors in a Harley-Davidson motorcycle. These sensors help monitor the temperature and oxygen levels in the engine and exhaust system, which is essential for ensuring that the engine is running efficiently and that emissions are kept to a minimum.

Some of the temperature and oxygen sensors used in Harley-Davidson motorcycles include the Throttle Position Sensor (TPS), the Manifold Absolute Pressure (MAP) sensor, and the Heated Oxygen Sensor (HO2S). These sensors help the ECM monitor the temperature and oxygen levels in the engine and exhaust system, which is crucial for maintaining proper engine performance and reducing emissions.

In conclusion, the sensor technology used in Harley-Davidson motorcycles is essential for ensuring that the engine runs smoothly and efficiently, and for detecting any issues or malfunctions that may arise. By monitoring various aspects of the engine and its performance, these sensors help ensure that your Harley-Davidson motorcycle is running at optimal levels.

Fuel Injection and Air Control

If you are experiencing issues with your Harley-Davidson motorcycle’s fuel injection and air control systems, it may be related to code 81308. This code is related to the rear audio control diagnostics, but it can also indicate problems with the fuel injector and air control systems.

Fuel Injection System

The fuel injection system is responsible for delivering the right amount of fuel to your motorcycle’s engine. If you are experiencing issues with your fuel injection system, it may be related to codes P0261, P0262, P0264, or P0265. These codes indicate issues with the fuel injector circuit, which can lead to a lean or rich fuel mixture and cause your motorcycle to run poorly.

If you are experiencing issues with your fuel injection system, it is important to have it diagnosed and repaired by a qualified technician. They can use diagnostic tools to identify the root cause of the problem and perform the necessary repairs.

Air Control System

The air control system is responsible for regulating the amount of air that enters your motorcycle’s engine. If you are experiencing issues with your air control system, it may be related to code P0505. This code indicates issues with the idle air control valve, which can cause your motorcycle to stall or run poorly at idle.

If you are experiencing issues with your air control system, it is important to have it diagnosed and repaired by a qualified technician. They can use diagnostic tools to identify the root cause of the problem and perform the necessary repairs.

In conclusion, if you are experiencing issues with your Harley-Davidson motorcycle’s fuel injection and air control systems, it may be related to code 81308. It is important to have these systems diagnosed and repaired by a qualified technician to ensure your motorcycle is running properly and safely.

Handling Error Codes

When your Harley-Davidson motorcycle displays an error code, it can be frustrating and worrisome. However, with a little knowledge and understanding of the error codes, you can troubleshoot and resolve the issue quickly. In this section, we’ll cover some common problems that may cause error code 81308 to appear and how to reset the code.

Troubleshooting Common Problems

If you’re experiencing error code 81308, there are a few common problems that may be causing the issue. Here are some things to check:

• Check your battery: A weak or dead battery can cause error codes to appear. Make sure your battery is fully charged and in good condition.
• Check your wiring: Loose or damaged wiring can cause error codes to appear. Check all of your connections and wiring for any damage or looseness.
• Check your sensors: Faulty sensors can also cause error codes. Check your sensors and replace any that are faulty.

Resetting Error Codes

Once you’ve identified and resolved the problem causing the error code, you’ll need to reset the code. Here’s how to do it:

1. Turn off your motorcycle and remove the key from the ignition.
2. Locate the diagnostic connector under the seat. It should be a two-pin connector with a black and gray wire.
3. Connect a jumper wire between the black and gray wires.
4. Turn the ignition key to the “on” position but do not start the motorcycle.
5. After a few seconds, the check engine light will begin to flash. Count the flashes to determine the error code.
6. Once the check engine light stops flashing, turn off the ignition key and remove the jumper wire.
7. Wait a few seconds, then turn the ignition key back to the “on” position.

The error code should now be reset. If the code reappears, you may need to repeat the troubleshooting steps or seek professional assistance.

It’s important to note that error codes can vary depending on the year, make, and model of your Harley-Davidson motorcycle. Some other error codes you may encounter include P1009, P1270, P1501, P1502, P1511, P1512, and P1514. If you’re unsure of what an error code means or how to resolve it, consult your owner’s manual or seek professional assistance.

Motorcycle Control Systems

When it comes to your Harley-Davidson motorcycle, there are several control systems in place to ensure your safety and enjoyment on the road. In this section, we will discuss two of the most important control systems: Cruise Control and Throttle Management and the Anti-Lock Braking System (ABS).

Cruise Control and Throttle Management

One of the most convenient features of your Harley-Davidson motorcycle is the cruise control system. This system allows you to set and maintain a specific speed while riding, giving your hand a break from holding the throttle. To activate the cruise control system, first, ensure that the run/stop switch is in the “run” position. Then, press the set button on the left handlebar to set the speed. You can adjust the speed using the twist grip sensor on the right handlebar.

It’s important to note that the cruise control system is not a substitute for paying attention to the road. Always be aware of your surroundings and ready to take control of the motorcycle if necessary.

Anti-Lock Braking System (ABS)

The Anti-Lock Braking System (ABS) is a safety feature that helps prevent your wheels from locking up during hard braking. This system is designed to help you maintain control of your motorcycle in emergency situations. If the ABS system is activated, you will feel a pulsing sensation in the brake lever or pedal.

If your ABS system is malfunctioning, you may see one of several diagnostic trouble codes (DTCs) on your motorcycle’s dashboard. Some common DTCs related to the ABS system include B1103, B1153, B1200, B2102, B2103, B2104, B2112, B2113, and B2114. If you see one of these codes, it’s important to have your motorcycle inspected by a qualified technician as soon as possible.

In conclusion, understanding the various control systems on your Harley-Davidson motorcycle is essential for safe and enjoyable riding. By familiarizing yourself with the cruise control and throttle management system and the ABS system, you can ensure that you’re prepared for any situation on the road.

Vehicle Identification and Security

If you are a Harley-Davidson owner, you are probably familiar with the importance of vehicle identification and security. Harley-Davidson motorcycles are equipped with various security systems that help protect your bike from theft. One of these security systems is the security code, which is a four-digit code that is unique to your motorcycle.

VIN and Security Systems

The Vehicle Identification Number (VIN) is a unique 17-digit code that identifies your Harley-Davidson motorcycle. It is located on the frame of your bike and is used for various purposes such as registration, insurance, and identification. The VIN also plays a crucial role in the security systems of your motorcycle.

Harley-Davidson motorcycles are equipped with various security systems such as the FOB (keyless ignition), HFSM (Hands-Free Security Module), and TSSM (Turn Signal Security Module). These security systems use the VIN to communicate with each other and ensure that your motorcycle is secure.

Speedometer and Indicator Lights

The speedometer is an essential component of your Harley-Davidson motorcycle. It displays your speed, mileage, and other important information. However, sometimes you may encounter issues with your speedometer, such as error codes P0502, P0503, P0572, or P0577.

Error codes P0502 and P0503 indicate issues with the speed sensor circuit. This can cause your speedometer to malfunction or stop working altogether. Error codes P0572 and P0577 indicate issues with the brake switch circuit. This can cause your brake lights to malfunction or stay on continuously.

If you encounter any of these issues, it is important to have your motorcycle inspected by a certified Harley-Davidson technician. They can diagnose the issue and repair it quickly and efficiently.

In conclusion, vehicle identification and security are crucial aspects of owning a Harley-Davidson motorcycle. It is important to understand the various security systems and how they work together to protect your bike. Additionally, if you encounter any issues with your speedometer or indicator lights, it is important to have them inspected and repaired by a certified Harley-Davidson technician.

Advanced Diagnostics and Updates

If you’re experiencing trouble with your Harley’s audio control system, Harley code 81308 may be the issue. However, before jumping to conclusions, it’s important to understand how the CAN bus and electronic systems work in your motorcycle.

CAN Bus and Electronic Systems

The CAN bus system is a network of electronic components that communicate with each other to ensure the proper functioning of your motorcycle. The LHCM (Left Hand Control Module) and JSS (J1850 Speedometer Sender) are two of the many components that make up this network. If any of these components fail or malfunction, it can cause issues with the audio control system and trigger code 81308.

To diagnose the issue, you can use a diagnostic tool to check for any fault codes. If code 81308 is present, it’s recommended that you check the LHCM and JSS for any faults or damage. If everything checks out, you may need to update the software in your motorcycle to ensure that all of the components are communicating properly.

Software Updates and Performance Tuning

Updating the software in your motorcycle can help to improve performance and fix any issues that you may be experiencing. However, it’s important to note that not all software updates are created equal. Some updates may be designed to address specific issues, while others may be geared towards improving overall performance.

If you’re experiencing issues with code 81308, it’s recommended that you check for any available software updates. If an update is available, it’s important to follow the instructions carefully to ensure that the update is installed properly.

Finally, if you’re looking to improve the performance of your motorcycle, you may want to consider performance tuning. This can involve making changes to the fuel injection system or other components to improve horsepower and torque. However, it’s important to note that performance tuning should only be done by a qualified professional to ensure that it’s done safely and correctly.

By understanding how the CAN bus and electronic systems work in your motorcycle, and by keeping your software up to date, you can help to ensure that your Harley is running smoothly and efficiently.