If you own a Harley-Davidson motorcycle, you may have come across the error code 81311 at some point. This code is related to the rear audio control diagnostics, and it indicates that the rear PTT button is stuck. When this happens, you may experience issues with the audio system on your bike, such as the inability to adjust the volume or change tracks.
Fortunately, there are ways to diagnose and resolve this issue. One option is to try resetting the audio system by turning off the bike’s ignition and then turning it back on. If this doesn’t work, you may need to take your bike to a certified Harley-Davidson mechanic who can diagnose and fix the issue.
It’s important to address the 81311 error code as soon as possible, as it can impact your riding experience and even compromise your safety. By taking the necessary steps to diagnose and resolve this issue, you can ensure that your Harley-Davidson motorcycle is running smoothly and that you’re able to enjoy your rides to the fullest.
Understanding Harley Diagnostic Trouble Codes (DTCs)
If you own a Harley-Davidson motorcycle, you may have encountered a Diagnostic Trouble Code (DTC) at some point. DTCs are used to identify and diagnose problems in the motorcycle’s onboard diagnostic system. Understanding these codes can help you troubleshoot issues and avoid expensive repairs. In this section, we’ll cover the basics of DTCs and some common Harley DTCs.
DTC Basics
DTCs are alphanumeric codes that indicate a specific problem with the motorcycle. The codes are stored in the motorcycle’s onboard computer and can be accessed using a diagnostic tool or by following a specific procedure. Each code consists of a letter and four numbers. The letter indicates the system in which the problem occurred, while the numbers provide additional information about the issue.
Common Harley DTCs
Here are some of the most common DTCs that you may encounter on your Harley-Davidson motorcycle:
- B1103: Front Turn Signal Short to Ground
- B1153: Sidecar BAS Low Voltage
- B1200: Fuel Sender Open/Low
- B1300: Turn Signal Rear Open/Low
- B1301: Turn Signal Rear Short to Battery
- B1302: Turn Signal Rear Short to Ground
- B1303: Turn Signal Front Open/Low
- B1304: Turn Signal Front Short to Battery
- B1305: Turn Signal Front Short to Ground
- B1306: Bank Angle Sensor Low
- B1309: Battery Voltage High
- B1310: Battery Voltage Low
- B1312: Ignition Switch Open/Low
- B1313: Starter Relay Open/Low
- B1314: Brake Switch Open/Low
- P0031: HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
- P0032: HO2S Heater Control Circuit High (Bank 1 Sensor 1)
- P0051: HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
- P0052: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
- P0107: MAP Sensor Low
- P0108: MAP Sensor High
- P0112: IAT Sensor Low
- P0113: IAT Sensor High
- P0117: ET Sensor Low
- P0118: ET Sensor High
- P0120: TPS1 Range Error
- P0122: TPS1 Low
- P0123: TPS2 High
- P0131: Front Oxygen Sensor Low
- P0132: Front Oxygen Sensor High
- P0134: Front Oxygen Sensor Inactive
- P0151: Rear Oxygen Sensor Low
- P0152: Rear Oxygen Sensor High
- P0154: Rear Oxygen Sensor Inactive
- P0220: TPS2 Range Error
- P0222: TPS2 Low
- P0223: TPS2 High
- P0261: Front Injector Open/Low
- P0262: Front Injector High
- P0264: Rear Injector Open/Low
- P0265: Rear Injector High
- P0371: CKP Sensor A/B Correlation
- P0374: CKP Sensor Synch Error
- P0444: Purge Solenoid Open/Low
- P0445: Purge Solenoid High
- P0502: VSS Low
- P0503: VSS High
- P0505: TAC System Error
- P0562: Battery Voltage Low
- P0572: Brake Switch Low
- P0577: Cruise Control Input High
- P0603: ECM EEPROM Memory Error
These codes are just a few examples of the many DTCs that can occur on a Harley-Davidson motorcycle. If you encounter a DTC on your motorcycle, it’s important to diagnose and fix the problem as soon as possible to avoid further damage. You can consult your owner’s manual or a qualified technician for help with troubleshooting and repairs.
Harley’s Electrical System Overview
If you are experiencing issues with the electrical system of your Harley, it is important to have a basic understanding of how it works. The electrical system of a Harley is responsible for powering the lights, ignition, engine control unit (ECU), and other electronic components. Here is a brief overview of some of the key components of the electrical system:
Battery and Ignition
The battery is the heart of the electrical system in your Harley. It provides the power necessary to start the engine and run the electrical components. The ignition system is responsible for igniting the fuel in the engine. A faulty battery or ignition system can cause a range of issues, including difficulty starting the engine, poor performance, and stalling.
Engine Control Unit (ECU)
The ECU is the brain of the engine. It controls the fuel injection, ignition timing, and other critical functions. It receives input from various sensors throughout the engine and adjusts the fuel and air mixture accordingly. A malfunctioning ECU can cause a range of issues, including poor performance, difficulty starting the engine, and stalling.
Body Control Module (BCM)
The BCM is responsible for controlling the electronic components of the bike, such as the lights, radio, and other accessories. It receives input from various sensors and switches and sends signals to the appropriate components. A faulty BCM can cause a range of issues, including malfunctioning lights, radio, and other accessories.
It is important to ensure that all of the components of the electrical system are functioning properly. Regular maintenance and inspections can help prevent issues from arising. If you are experiencing issues with your Harley’s electrical system, it is recommended to seek the assistance of a professional technician who has experience working with Harley-Davidson motorcycles.
Overall, the electrical system of a Harley is complex but essential to the proper functioning of the bike. Understanding the basic components and how they work together can help you diagnose and prevent issues from occurring.
Engine Management and Performance
If you are experiencing issues with your Harley-Davidson’s engine management and performance, it is important to know how to diagnose and troubleshoot the problem. The following subsections will provide you with some information on the fuel injection system, throttle position sensor (TPS), and engine diagnostics.
Fuel Injection System
The fuel injection system is responsible for delivering the correct amount of fuel to the engine. If there is a problem with the fuel injection system, it can result in poor engine performance or even engine failure. One of the most common issues with the fuel injection system is a clogged fuel injector. This can be caused by a buildup of debris or dirt in the fuel system. To prevent this, it is important to regularly clean and maintain your fuel system.
Throttle Position Sensor (TPS)
The throttle position sensor (TPS) is responsible for monitoring the position of the throttle. If there is a problem with the TPS, it can cause issues with the engine’s performance. One of the most common issues with the TPS is a faulty sensor. This can cause the engine to run poorly or even stall. To prevent this, it is important to regularly check and replace your TPS.
Engine Diagnostics
If you are experiencing issues with your engine, it is important to perform engine diagnostics to determine the root cause of the problem. One of the most common tools used for engine diagnostics is a diagnostic code reader. This tool can be used to read the diagnostic trouble codes (DTCs) that are stored in the engine’s computer. These codes can help you pinpoint the problem and determine the best course of action.
In summary, the fuel injection system, throttle position sensor (TPS), and engine diagnostics are all important components of your Harley-Davidson’s engine management and performance. By understanding how these components work and how to troubleshoot issues, you can keep your engine running smoothly and prevent costly repairs.
Chassis and Safety Features
Harley-Davidson motorcycles come equipped with a range of safety features to ensure a smooth and safe ride. Among these features is the Chassis and Safety Control Module (CSCM), which monitors the motorcycle’s various systems and alerts the rider if any issues occur.
Anti-Lock Braking System (ABS)
The ABS is a crucial safety feature on Harley-Davidson motorcycles. It helps prevent the wheels from locking up during hard braking, which can cause the rider to lose control of the motorcycle. The ABS is controlled by the LHCM and RHCM, which monitor the motorcycle’s speed and wheel rotation. If the ABS detects any anomalies, it will trigger a fault code, such as code 81311.
Speedometer and Gauges
The speedometer and gauges are controlled by the Body Control Module (BCM). The BCM receives input from various sensors on the motorcycle, such as the speed sensor, and displays the information on the speedometer and gauges. If the BCM detects any issues, it will trigger a fault code, such as code 81311.
Lights and Horn Control Module (LHCM/RHCM)
The LHCM and RHCM control the motorcycle’s lighting and horn systems. They receive input from various sensors, such as the headlight switch and horn button, and activate the corresponding systems. If the LHCM or RHCM detects any issues, it will trigger a fault code, such as code 81311.
In conclusion, the Chassis and Safety Control Module (CSCM) is a crucial component of Harley-Davidson motorcycles. It helps ensure the motorcycle’s various systems are working correctly and alerts the rider if any issues occur. The ABS, speedometer and gauges, and LHCM/RHCM are just a few of the systems monitored by the CSCM. If you encounter fault code 81311, it is essential to have your motorcycle serviced by a qualified technician to ensure your safety on the road.
Harley Security and Error Codes
Security System Components
Harley-Davidson motorcycles come equipped with a security system that helps protect the bike from theft. The security system consists of several components, including a security antenna, left-hand control module (LHCM), right-hand control module (RHCM), and a key fob. The security antenna is located in the rear fender and communicates with the LHCM and RHCM to determine if the key fob is within range and if it is authorized to start the bike.
If the security system detects an issue with any of its components, it will trigger an error code. One of the most common error codes is 81311, which indicates an LHCM or RHCM internal error. This error code can prevent the bike from starting or cause it to stall while riding.
Error Code Interpretation
When you encounter an error code on your Harley-Davidson motorcycle, it can be helpful to understand what it means. The error code 81311 indicates an LHCM or RHCM internal error. This error code can be caused by a variety of issues, including a faulty LHCM or RHCM, a damaged security antenna, or a problem with the wiring between these components.
To diagnose and fix this issue, you may need to take your bike to a Harley-Davidson dealership or a qualified mechanic. They will be able to use diagnostic tools to determine the exact cause of the error code and make any necessary repairs.
In conclusion, understanding the security system components and error codes on your Harley-Davidson motorcycle can help you diagnose and fix issues as they arise. If you encounter an error code like 81311, it is important to take your bike to a qualified mechanic to ensure that it is repaired properly.
Accessories and Customization Errors
If you’re experiencing Harley code 81311, it’s likely that there’s an issue with your accessory circuit output. This can be caused by a variety of factors, such as overloading or shorting. Fortunately, there are steps you can take to diagnose and fix the problem.
Accessory Circuit Output
The accessory circuit output is responsible for powering any additional accessories or customizations you’ve added to your Harley. If this circuit is overloaded, it can cause the system to fail and trigger an error code. To fix this issue, you’ll need to remove any unnecessary accessories and ensure that the remaining ones are not drawing too much power.
Another potential cause of this error code is a short in the accessory circuit output. This can occur if the wiring is damaged or if an accessory is installed incorrectly. To diagnose this issue, you’ll need to check the wiring and inspect all accessories for damage or improper installation.
Conclusion
In summary, Harley code 81311 is an indication that there’s an issue with your accessory circuit output. This can be caused by overloading or shorting, but can be fixed by removing unnecessary accessories and checking the wiring for damage. By following these steps, you can get your Harley back up and running smoothly.
Troubleshooting and Maintenance
If you are experiencing Harley code 81311, there are a few things you can do to troubleshoot and maintain your motorcycle. Here are some tips to help you get started.
Common Electrical Faults
One of the most common causes of Harley code 81311 is an internal fault in the motorcycle’s electrical system. To diagnose this issue, you can use a multimeter to test the voltage and resistance of various components. Check the battery, alternator, and wiring harness for any signs of damage or wear. If you find any issues, you may need to replace the damaged components.
Another common electrical issue that can cause Harley code 81311 is a fuel signal that is too high. This can be caused by a faulty fuel pump or a clogged fuel filter. To fix this issue, you may need to replace the fuel pump or clean or replace the fuel filter.
Service Reminders and Resets
To maintain your Harley and prevent issues like code 81311, it is important to follow the manufacturer’s recommended service schedule. This includes regular oil changes, tire rotations, and brake inspections.
You can also perform regular resets to keep your motorcycle running smoothly. For example, you can reset the rear volume up button if it gets stuck. To do this, simply disconnect the battery for a few minutes and then reconnect it. This should reset the button and allow it to function properly.
In conclusion, Harley code 81311 can be caused by a variety of issues, including electrical faults and fuel signal problems. By following the tips outlined above, you can troubleshoot and maintain your motorcycle to prevent this issue from occurring.