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Harley Code B1200: Understanding and Troubleshooting the Issue

by

Chase Manhattan

Chase Manhattan Avatar
Owner and Editor at The Wrench Network

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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!

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If you own a Harley-Davidson motorcycle, you may have encountered a fault code displayed on the instrument cluster. One of the most common codes that Harley riders face is the B1200 code. This code indicates an internal fault in the instrument module and is a serious issue that requires immediate attention.

When the B1200 code appears, it means that the instrument module has detected a fault in one of its circuits. This fault could be caused by a variety of issues, including a malfunctioning sensor or a wiring problem. If left unaddressed, this fault can cause serious problems with your motorcycle’s performance and safety. It is recommended that you take your Harley to a qualified technician as soon as possible to diagnose and repair the issue.

Fortunately, there are several ways to diagnose and fix the B1200 code. A qualified technician can use diagnostic tools to pinpoint the exact cause of the fault and make the necessary repairs. In some cases, the issue may be as simple as replacing a faulty sensor or repairing a damaged wire. Whatever the cause, it is important to address the B1200 code quickly to ensure the safety and reliability of your Harley-Davidson motorcycle.

Understanding Harley Trouble Codes

If you own a Harley-Davidson motorcycle, you might have seen the Check Engine light come on at some point. This light is an indication that there is a problem with your bike’s system, and you need to diagnose the issue to fix it. The Check Engine light is also known as the Malfunction Indicator Lamp (MIL) and is part of the onboard diagnostic system (OBD-II) that monitors your bike’s systems and reports any issues through trouble codes.

Trouble Code Fundamentals

Harley-Davidson motorcycles use Diagnostic Trouble Codes (DTCs) to identify issues with the bike’s systems. DTCs are alphanumeric codes that consist of a letter followed by four digits. The letter corresponds to the affected system, and the digits provide more specific information about the problem. For example, a code like “B1200” indicates an issue related to the instrument’s internal fault.

Common Harley Diagnostic Codes

Here are some of the most common Harley Diagnostic Codes that you might encounter:

  • B1103: Front Turn Signal Output Short to Ground
  • B1153: Sidecar BAS Low/Open
  • B1200: Instrument Internal Fault
  • B1211: Fuel Sender Open/Low
  • B2116: Left Rear Turn Signal Output Short to Ground
  • B2102: Throttle Actuator Control Motor Circuit Low
  • B2103: Throttle Actuator Control Motor Circuit High
  • B2104: Throttle Actuator Control Motor Open Circuit
  • B2112: Left Turn Output Fault
  • B2113: Right Turn Output Fault
  • B2114: Hazard Output Fault
  • B2117: Security Antenna Short to Ground

If you encounter a DTC, you can use the Harley-Davidson Fault Code Chart or the OBD-II scanner to diagnose the issue. Once you have identified the problem, you can fix it yourself or take your bike to a professional mechanic.

In conclusion, understanding Harley Diagnostic Codes is essential for any Harley-Davidson owner. By knowing what the codes mean, you can diagnose and fix issues with your bike’s systems and keep it running smoothly.

Electrical System Overview

If you’re experiencing the B1200 code on your Harley, it’s likely related to the electrical system. The electrical system on your Harley is responsible for powering everything from the ignition system to the lights and accessories. Understanding the different components of the electrical system can help you diagnose and fix any issues you may be experiencing.

Battery and Charging

The battery is the heart of the electrical system on your Harley. It’s responsible for providing power to the starter and ignition system, as well as all of the lights and accessories on the bike. If your battery is low on voltage, you may experience issues starting your bike or have problems with your lights and accessories.

The charging system on your Harley is responsible for keeping the battery charged while you ride. If your charging system isn’t working properly, your battery may not be getting the charge it needs, which can lead to issues with starting the bike or running accessories.

Ignition System

The ignition system on your Harley is responsible for starting the bike and keeping it running. If you’re experiencing issues with the ignition system, such as difficulty starting the bike or stalling, it could be related to a problem with the battery or charging system.

Body Control Module (BCM)

The Body Control Module (BCM) on your Harley is responsible for controlling many of the electrical systems on the bike, including the lights and accessories. If you’re experiencing issues with your lights or accessories, it could be related to a problem with the BCM.

Voltage Low and Voltage High

If you’re experiencing the B1200 code on your Harley, it could be related to a voltage issue. Voltage that is too low or too high can cause a variety of issues with the electrical system, including problems with starting the bike or running accessories. If you suspect a voltage issue, it’s important to have your battery and charging system checked to ensure they’re working properly.

In summary, the electrical system on your Harley is responsible for powering everything from the ignition system to the lights and accessories. Understanding the different components of the system and how they work together can help you diagnose and fix any issues you may be experiencing.

Harley Code B1200 Specifics

Harley Code B1200 is a diagnostic trouble code that indicates an issue with the motorcycle’s BCM (Body Control Module) or IM (Instrument Module). This code is usually accompanied by an indicator lamp that is always on.

ACC Output Issues

One possible cause of Harley Code B1200 is an issue with the ACC (Accessory Control Circuit) output. This can occur when the ACC output is shorted high or low. If you are experiencing this issue, you may notice that your motorcycle’s accessories are not functioning properly or at all.

To resolve this issue, you will need to inspect your motorcycle’s wiring and connectors to ensure that they are not damaged or corroded. If you find any issues, you will need to repair or replace the affected components. You may also need to reset the BCM or IM to clear the code.

Security Antenna Concerns

Another possible cause of Harley Code B1200 is an issue with the security antenna output. This can occur when the security antenna output is open or shorted high or low. If you are experiencing this issue, you may notice that your motorcycle’s security system is not functioning properly or at all.

To resolve this issue, you will need to inspect your motorcycle’s security system and wiring to ensure that they are not damaged or corroded. If you find any issues, you will need to repair or replace the affected components. You may also need to reset the BCM or IM to clear the code.

It is important to note that Harley Code B1200 is a specific code that indicates a specific issue with your motorcycle. If you are experiencing this issue, it is recommended that you take your motorcycle to a qualified technician for diagnosis and repair. Attempting to diagnose and repair this issue on your own can be dangerous and may cause further damage to your motorcycle.

Sensor and Switch Failures

If you are experiencing Harley code B1200, it could be due to sensor or switch failures. This code indicates an instrument internal fault, which means there is a problem with the internal circuitry of the instrument cluster.

IAT and ISS Sensors

One possible cause of B1200 is a failure of the IAT (Intake Air Temperature) or ISS (Intake Air Temperature Sensor) sensors. These sensors are responsible for measuring the temperature of the air entering the engine. If they fail, the engine may not run properly and you may experience a loss of power or poor fuel economy.

Fuel Pump and Brake Lamp Issues

Another possible cause of B1200 is an issue with the fuel pump output or brake lamp output. If the fuel pump output is open, the fuel pump may not run properly, which can cause the engine to stall or run poorly. If the brake lamp output is shorted low, it can cause the brake lights to stay on all the time, which can drain the battery and potentially cause a safety hazard.

To diagnose the issue, you can use a diagnostic tool or take your bike to a Harley-Davidson dealership for a professional diagnosis. Once the problem is identified, you can work with a mechanic to repair or replace the faulty component.

Remember, regular maintenance and inspections can help prevent sensor and switch failures. Be sure to follow the manufacturer’s recommended maintenance schedule and keep an eye out for any warning signs of potential issues.

CAN Bus and Electronic Communication

CAN System Introduction

The Controller Area Network (CAN) is a communication protocol used in modern Harley-Davidson motorcycles. It is a bus system that allows electronic devices and modules to communicate with each other. The CAN system is responsible for transmitting data between the Engine Control Unit (ECU), Fuel Injection (FI) system, Left and Right Hand Control Modules (LHCM and RHCM), and the Body Control Module (BCM).

Troubleshooting CAN Communication

If you are experiencing issues with the BCM, you may encounter the B1200 IM Internal Fault code. This code indicates that there is a problem with the internal circuitry of the BCM. The BCM is responsible for controlling the lighting system and other electronic components of your motorcycle.

To troubleshoot the issue, you can use a diagnostic tool to read the BCM codes. If you find the B1200 code, you can try to reset the BCM by disconnecting the battery for at least 30 seconds. If the code persists, you may need to replace the BCM.

It is important to note that the B1200 code can also be triggered by other issues such as LHCM Internal Error or RHCM Internal Error. These codes indicate that there is a problem with the left or right hand control module. In this case, you may need to replace the affected module.

In conclusion, the CAN system is an important part of your Harley-Davidson motorcycle, allowing for efficient communication between electronic components. If you encounter issues with the BCM or other electronic modules, it is important to troubleshoot the issue using a diagnostic tool and replace any faulty components as needed.

Motorcycle Service and Maintenance

When it comes to maintaining your Harley Davidson motorcycle, there are a few things you should keep in mind to ensure it stays in good condition. In this section, we’ll go over some routine checks and service intervals you should follow to keep your bike running smoothly.

Routine Checks

Regularly checking your Harley Davidson for any potential issues can help you catch problems early on and avoid costly repairs down the road. Here are a few things you should check on a regular basis:

  • Tires: Check your tire pressure and tread depth regularly to ensure your bike is safe to ride.
  • Fluids: Check your oil, coolant, and brake fluid levels regularly to ensure they’re at the appropriate levels.
  • Lights: Check your headlight, taillight, and turn signals to ensure they’re working properly.
  • Brakes: Test your brakes regularly to ensure they’re functioning correctly.
  • Battery: Check your battery’s voltage regularly to ensure it’s holding a charge.

Service Intervals

In addition to routine checks, there are also certain service intervals you should follow to keep your Harley Davidson running smoothly. Here are a few examples:

  • Oil Changes: Harley Davidson recommends changing your oil every 5,000 miles or six months, whichever comes first.
  • Brake Fluid: Harley Davidson recommends replacing your brake fluid every two years.
  • Tires: Harley Davidson recommends replacing your tires every 10,000 miles or sooner if they’re worn down.
  • Spark Plugs: Harley Davidson recommends replacing your spark plugs every 20,000 miles.

By following these routine checks and service intervals, you can help ensure your Harley Davidson motorcycle stays in good condition and runs smoothly for years to come. Remember to always refer to your owner’s manual for specific maintenance recommendations and consult a professional mechanic if you’re unsure about any repairs or maintenance tasks.

Advanced Diagnostic Procedures

If you are experiencing Harley code B1200, there are a few advanced diagnostic procedures you can perform to troubleshoot the issue.

Using Diagnostic Tools

One of the most effective ways to diagnose Harley code B1200 is by using diagnostic tools. You can use a digital multimeter (DMM) to test the voltage of the battery and ensure that it is at least 12.5 volts. You can also use a scan tool to retrieve the trouble codes and perform live data monitoring. The scan tool can also help you clear the codes after fixing the issue.

Interpreting Advanced Trouble Codes

Harley code B1200 is a body control module (BCM) fault. If you have a scan tool, you can retrieve advanced trouble codes to get more information about the issue. Here are some of the codes you may encounter and their meanings:

  • B1310: Accessory Line Overvoltage
  • B1312: Battery Voltage High
  • B1313: Battery Voltage Low
  • B1314: Ignition Voltage High
  • B1315: Ignition Voltage Low
  • B1316: Security Line Overvoltage
  • B1317: Security Line Undervoltage
  • B1318: TSM/TSSM Over Temperature
  • B1319: TSM/TSSM Under Temperature
  • B1320: TSM/TSSM Memory Error
  • B1321: TSM/TSSM Communication Error
  • B1322: TSM/TSSM Invalid Serial Data
  • B1323: TSM/TSSM Missing Serial Data
  • B1324: TSM/TSSM ROM Error
  • B1325: TSM/TSSM RAM Error
  • B1326: TSM/TSSM EEPROM Error
  • B1327: TSM/TSSM Flash Error
  • B1328: TSM/TSSM Configuration Error
  • B1330: HFSM Data Error
  • B1331: HFSM ROM Error
  • B1332: HFSM RAM Error
  • B1334: HFSM EEPROM Error
  • B1335: HFSM Flash Error
  • B1336: HFSM Configuration Error
  • B1337: HFSM Invalid Serial Data
  • B1338: HFSM Missing Serial Data
  • B1339: HFSM Communication Error
  • B1340: HFSM Over Temperature
  • B1341: HFSM Under Temperature
  • B1342: HFSM Security Line Overvoltage
  • B1343: HFSM Security Line Undervoltage
  • B1344: HFSM Memory Error
  • B1345: HFSM Invalid Configuration
  • B1346: HFSM Invalid Option

By interpreting these codes, you can gain a better understanding of the issue and take appropriate actions to fix it.

Remember, if you are not comfortable performing these advanced diagnostic procedures, it is always best to take your motorcycle to an authorized Harley-Davidson dealer. They have the expertise and tools necessary to diagnose and fix the issue.

Common Issues and Solutions

If you’re experiencing Harley Davidson code B1200, you’re not alone. This code indicates an issue with the security antenna output being open. However, this is not the only issue that can cause this code to appear. In this section, we’ll go over some common issues and solutions related to Harley code B1200.

Handling Electrical Overloads

One common issue that can cause code B1200 is an electrical overload. This can happen when there are too many electrical components drawing power at the same time. To address this issue, you may need to reduce the number of components drawing power or upgrade your battery to handle the load.

Addressing Output Shorts

Another common issue that can cause code B1200 is output shorts. This can happen when there is a short circuit in the wiring or a malfunctioning component. To address this issue, you may need to inspect the wiring and components for any signs of damage or wear. If you find any issues, you may need to replace the damaged parts or repair the wiring.

H2 Output Shorted High

If you’re experiencing an output shorted high, this means that the signal voltage is higher than normal. This can happen when there is a malfunctioning component or a wiring issue. To address this issue, you may need to inspect the wiring and components for any signs of damage or wear. If you find any issues, you may need to replace the damaged parts or repair the wiring.

H2 Output Shorted Low

If you’re experiencing an output shorted low, this means that the signal voltage is lower than normal. This can happen when there is a malfunctioning component or a wiring issue. To address this issue, you may need to inspect the wiring and components for any signs of damage or wear. If you find any issues, you may need to replace the damaged parts or repair the wiring.

Brake Lamp Output Overloaded

If you’re experiencing brake lamp output overloaded, this means that the brake lamp circuit is drawing too much power. This can happen when there is a malfunctioning component or a wiring issue. To address this issue, you may need to inspect the wiring and components for any signs of damage or wear. If you find any issues, you may need to replace the damaged parts or repair the wiring.

By following these tips, you can help resolve common issues related to Harley code B1200. If you’re still experiencing issues after trying these solutions, it may be time to consult with a professional mechanic or Harley Davidson dealership for further assistance.

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