The c0077 Harley code is a diagnostic trouble code (DTC) that indicates a low tire pressure condition on the vehicle. This code is accompanied by a solid security light (red light) that stays on after the bike has been started. The self-diagnostic system of Harley-Davidson motorcycles detects a malfunction when this code is displayed.
When a low tire pressure condition exists, the tire pressure falls below or is equal to the low pressure threshold value as specified for the vehicle. Incorrect tire pressure, tire pressure monitoring (TPM) sensor, and wireless control module (WCM) are some of the possible causes of this DTC. It is essential to check the tire pressure of both the front and rear tires, even if the TPM sensors are reading correctly.
If the c0077 Harley code is displayed, it is recommended to address the issue promptly. Riding a motorcycle with low tire pressure can lead to reduced handling, decreased fuel efficiency, and increased tire wear. Neglecting this issue can also lead to safety hazards, such as tire blowouts and loss of control while riding.
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Understanding The C0077 Harley Code
Definition and Significance
C0077 is a diagnostic trouble code (DTC) that indicates a low tire pressure condition in a Harley Davidson motorcycle. This code is significant because low tire pressure can lead to poor handling, reduced fuel economy, and increased risk of tire failure. It is important to address this issue as soon as possible to avoid potential safety hazards.
Common Causes
There are several common causes of a C0077 code in a Harley Davidson motorcycle. One of the most common causes is incorrect tire pressure. The tire pressure sensor may also be faulty, leading to an incorrect reading. Other potential causes include a damaged or punctured tire, a malfunctioning tire pressure monitoring system (TPMS), or a problem with the wiring or connectors in the system.
Symptoms and Effects
The symptoms of a C0077 code may include an illuminated ABS warning light and/or an illuminated engine light (or service engine soon warning light). The rider may also notice poor handling or reduced fuel economy. In some cases, the rider may notice a decrease in tire pressure or even a flat tire.
If left unaddressed, a C0077 code can lead to serious safety hazards, such as loss of control while riding, increased risk of tire failure, and reduced fuel economy. It is important to address this issue as soon as possible to ensure the safe operation of the motorcycle.
In summary, a C0077 code is a significant issue that indicates a low tire pressure condition in a Harley Davidson motorcycle. It is important to address this issue promptly to avoid potential safety hazards and ensure the safe operation of the motorcycle. Common causes of the code include incorrect tire pressure, faulty tire pressure sensors, and damaged or punctured tires. Symptoms may include illuminated warning lights, poor handling, and reduced fuel economy.
Diagnostic Process
Initial Steps
When a Harley-Davidson motorcycle displays the C0077 DTC, it indicates a low tire pressure condition. The first step in the diagnostic process is to check the tire pressure of both the front and rear tires. The tire pressure should be checked using a tire pressure gauge to ensure that the readings are accurate. If the tire pressure is below the recommended level, it should be inflated to the correct pressure.
Tools and Equipment
To diagnose the C0077 DTC, the technician will need a tire pressure gauge to check the tire pressure of both the front and rear tires. The technician will also need a scan tool to read and clear the DTC from the motorcycle’s computer. A wireless control module (WCM) may also be required to troubleshoot the TPM sensor.
Troubleshooting Techniques
The technician should start the troubleshooting process by checking the tire pressure of both the front and rear tires. If the tire pressure is within the recommended range, the technician should check the TPM sensor. The TPM sensor should be checked for proper installation and operation. If the TPM sensor is operating correctly, the technician should check the wiring and connectors between the TPM sensor and the WCM. If the wiring and connectors are in good condition, the technician should check the WCM for proper operation.
In conclusion, the diagnostic process for the C0077 DTC involves checking the tire pressure of both the front and rear tires, using a scan tool to read and clear the DTC, and checking the TPM sensor, wiring, and WCM for proper operation. By following these steps, the technician can quickly diagnose and repair the low tire pressure condition on the Harley-Davidson motorcycle.
Repair and Resolution
Addressing C0077 Code
When a C0077 diagnostic trouble code appears on a Harley Davidson motorcycle, it indicates that there is a low tire pressure subfault detected. This means that the tire pressure sensor may have an internal fault or the spare tire is not equipped with a tire pressure sensor and is currently on the vehicle. To address this issue, the rider should check the tire pressure of both the front and rear tires to ensure they are within the recommended range.
Resetting the Code
Once the tire pressure has been checked and corrected, the rider can attempt to reset the C0077 code. This can be done by using a scan tool to erase the DTCs. After erasing the DTCs, the rider should test drive the motorcycle at speeds greater than 24 km/h (15 mph) for 10 minutes in order to receive TPM sensor data. Finally, with the ignition on and the engine not running, the rider can use the scan tool to read the DTCs.
Preventative Measures
To prevent the C0077 code from appearing in the future, riders should regularly check the tire pressure of their Harley Davidson motorcycle. This can be done using a tire pressure gauge or by visiting a local Harley Davidson dealer. Additionally, riders should ensure that their spare tire is equipped with a tire pressure sensor to avoid any potential issues with the sensor.
Overall, addressing the C0077 code on a Harley Davidson motorcycle requires checking and correcting the tire pressure, resetting the code using a scan tool, and taking preventative measures to ensure the code does not appear in the future. By following these steps, riders can ensure their motorcycle is running smoothly and safely.
Understanding Important Electrical Components
Battery and Charging System
The battery and charging system are essential electrical components in any vehicle, including Harley Davidson motorcycles. A weak or faulty battery can cause the motorcycle’s electrical system to malfunction, leading to error codes such as c0077. It is recommended to ensure that the battery is fully charged and in good condition before troubleshooting any electrical issues.
Sensors and Switches
Sensors and switches play a crucial role in the proper functioning of the motorcycle’s electrical system. The tire pressure monitoring sensor (TPMS) is responsible for monitoring the tire pressure and sending the data to the body control module (BCM). If the TPMS sensor is faulty, it can cause the c0077 error code to appear on the dashboard. Additionally, the ignition switch and other sensors can also cause electrical issues that may lead to error codes.
Wiring and Connectors
The wiring and connectors in the motorcycle’s electrical system are also important components to consider when troubleshooting error codes such as c0077. Loose or damaged wiring and connectors can cause electrical issues, leading to error codes. It is recommended to check all the wiring and connectors for any signs of damage or wear and ensure that they are properly connected.
In conclusion, troubleshooting electrical issues in a Harley Davidson motorcycle can be challenging, but by understanding the various electrical components and their functions, one can effectively diagnose and fix any issues that may arise. It is recommended to seek the assistance of a professional mechanic if the issue persists or if you are unsure about any aspect of the electrical system.
Control Modules
The C0077 Harley code is related to the tire pressure monitoring system and can be caused by various issues in different control modules. Here are some of the most relevant control modules:
Body Control Module (BCM)
The BCM is responsible for controlling various body-related functions, including the tire pressure monitoring system. If the BCM is malfunctioning, it can cause the C0077 code to appear. Some possible BCM-related issues that can cause the code include LHCM internal error, RHCM internal error, and IM internal fault.
Engine Control Module (ECM)
The ECM is responsible for controlling the engine-related functions, but it can also be involved in the tire pressure monitoring system. If the ECM is malfunctioning, it can cause the C0077 code to appear. However, this is less likely than BCM-related issues.
Other Related Modules
Other modules that can be related to the C0077 code include the Wireless Control Module (WCM) and the Vehicle Dynamics Control Module (VDCM). These modules can also cause the code to appear if they are malfunctioning.
It is important to note that the C0077 code is just a general code related to the tire pressure monitoring system. To diagnose the exact cause of the code, it is necessary to use a diagnostic tool to read the specific fault codes stored in the control modules. Once the specific fault codes are identified, it will be easier to pinpoint the exact cause of the problem.
Sensor-Specific Information To Be Aware Of
Throttle Position Sensor (TPS)
The Throttle Position Sensor (TPS) measures the position of the throttle valve to determine the amount of air entering the engine. This sensor is responsible for providing the Engine Control Module (ECM) with the necessary information to adjust the fuel injection and ignition timing. If the TPS is not functioning properly, it can cause the bike to run poorly or even stall.
Fuel Level Sender
The Fuel Level Sender is responsible for measuring the amount of fuel in the tank and sending that information to the Fuel Gauge. A shorted low or open circuit in the Fuel Level Sender can cause the gauge to read incorrectly or not at all. It is important to ensure that the Fuel Level Sender is functioning properly to avoid running out of fuel unexpectedly.
Intake Air Temperature (IAT) Sensor
The Intake Air Temperature (IAT) Sensor measures the temperature of the air entering the engine. This information is used by the ECM to adjust the fuel injection and ignition timing. A faulty IAT Sensor can cause the bike to run poorly or even stall. It is important to ensure that the IAT Sensor is functioning properly to avoid any issues with engine performance.
It is important to note that the C0077 code is related to the Tire Pressure Monitoring (TPM) Sensor and not the sensors listed above. However, it is still important to ensure that all sensors are functioning properly to avoid any issues with engine performance. If the C0077 code persists after ensuring proper tire pressure, it may be necessary to seek the assistance of a qualified technician to diagnose and repair the issue.
Motorcycle Systems
Harley-Davidson motorcycles are equipped with several systems that work together to provide a safe and efficient riding experience. Some of these systems include the Anti-Lock Braking System (ABS), Turn Signal Module (TSM), and Electronic Fuel Injection (EFI).
Anti-Lock Braking System (ABS)
The ABS system on Harley-Davidson motorcycles is designed to prevent wheel lock-up during braking, which can cause loss of control and potential accidents. The system works by monitoring wheel speed and modulating brake pressure to prevent lock-up. If there is an issue with the ABS system, the ABS warning light will illuminate on the vehicle’s instrument panel.
Turn Signal Module (TSM)
The Turn Signal Module (TSM) on Harley-Davidson motorcycles controls the turn signals and four-way flashers. The TSM receives input from the handlebar controls and sends signals to the turn signal lights. If there is an issue with the TSM, the turn signals may not function properly or the turn signal indicator light may not illuminate on the instrument panel.
Electronic Fuel Injection (EFI)
Harley-Davidson motorcycles are equipped with Electronic Fuel Injection (EFI), which provides precise fuel metering and improved performance. The EFI system uses several sensors to monitor engine conditions and adjust fuel delivery accordingly. If there is an issue with the EFI system, the engine light may illuminate on the instrument panel.
When it comes to the C0077 Harley code, it is related to the Tire Pressure Monitoring System (TPMS). The TPMS system on Harley-Davidson motorcycles monitors tire pressure and alerts the rider if tire pressure is low. If there is an issue with the TPMS system, the C0077 code may be triggered, indicating low tire pressure. It is important to check tire pressure regularly and address any issues with the TPMS system promptly to ensure safe riding.
Additional Troubleshooting Information for Harley Code C0077
When it comes to troubleshooting codes, there are a few things to keep in mind. The first is that there are two types of codes: historic and current. Historic codes are those that have been stored in the system but are no longer active. Current codes are those that are currently active and are causing issues.
Historic and Current Codes
Historic codes can be helpful in diagnosing intermittent issues. For example, if a bike is experiencing intermittent low tire pressure issues, a historic code for low tire pressure could indicate that the issue is related to the tire pressure monitoring system. Current codes, on the other hand, are more helpful in diagnosing persistent issues.
Intermittent and Persistent Issues
Intermittent issues can be difficult to diagnose because they occur sporadically. However, they can often be diagnosed by looking at historic codes and performing a thorough inspection of the affected components. Persistent issues, on the other hand, are those that occur consistently and can be diagnosed by looking at current codes and performing a more detailed inspection of the affected components.
When it comes to c0077 Harley code, it is important to note that it is a current code that indicates a low tire pressure condition. This code can be caused by a number of issues, including a faulty tire pressure monitoring system, a punctured tire, or simply low tire pressure. If a bike is experiencing this code, it is important to check the tire pressure and the tire pressure monitoring system to ensure that they are functioning properly. If the issue persists, it may be necessary to perform a more detailed inspection of the affected components to determine the root cause of the issue.
Additional Considerations
When troubleshooting a Harley-Davidson motorcycle with the C0077 code, there are a few additional considerations to keep in mind.
First, it is important to note that the C0077 code indicates a low tire pressure condition. The pressure threshold value for the vehicle should be checked to ensure that it is within the recommended range. This can often be found in the vehicle’s owner’s manual or by checking the VIN number. It is important to note that incorrect tire pressure can also cause intermittent performance DTCs.
Second, it is recommended to check the tire pressure monitoring (TPM) sensor for any signs of damage or malfunction. The sensor is responsible for detecting the tire pressure and transmitting the information to the vehicle’s computer. If the sensor is damaged or not functioning correctly, it can cause the C0077 code to appear.
Third, it is important to ensure that the vehicle’s battery is fully charged during the update procedure to maintain a steady voltage. Applying the parking brake and turning off all accessories can also help to prevent any interference during the update process.
And finally,, when dealing with the C0077 code on a Harley-Davidson motorcycle, it is important to check the pressure threshold value, the TPM sensor, and ensure that the vehicle’s battery is fully charged during the update process. By following these additional considerations, it can help to ensure a successful troubleshooting process.
Frequently Asked Questions
What steps are involved in fixing the C0077 error on a Harley?
The steps involved in fixing the C0077 error on a Harley motorcycle will depend on the root cause of the issue. Some common causes of the C0077 error include low tire pressure, an incorrect tire pressure monitoring sensor, and a faulty wireless control module. To fix the issue, you may need to check your tire pressure, replace any faulty sensors, or seek professional help for more complex issues.
Is the C0077 code specific to Harley motorcycles?
The C0077 code is not specific to Harley motorcycles and can be found in other vehicles. The code is related to the tire pressure monitoring system and can be triggered by low tire pressure or other issues with the system.
What are the differences between C0077 and C0083 codes on Harley bikes?
The C0077 and C0083 codes on Harley bikes are related to the tire pressure monitoring system, but they have different meanings. The C0077 code indicates a low tire pressure condition, while the C0083 code indicates a high tire pressure condition.
Can you explain the meaning of Harley codes B2310h and B2151?
The B2310h code on a Harley motorcycle indicates an issue with the front tire pressure monitoring sensor. The B2151 code indicates an issue with the rear tire pressure monitoring sensor.
What troubleshooting methods should be followed for a C2000 or C1100h code on a Harley?
The C2000 and C1100h codes on a Harley motorcycle are related to issues with the electronic control module. To troubleshoot these codes, you may need to check the wiring connections, replace any faulty sensors, or seek professional help for more complex issues.
