A non-starting Harley Davidson motorcycle can be frustrating, especially when the start button is unresponsive. This often points to an issue with the Harley Davidson Theft Deterrent System Module (TSSM) or its related components. This article will delve into troubleshooting common TSSM issues, specifically focusing on resetting the PIN, diagnosing potential problems, and exploring replacement options.
Understanding the Harley Davidson TSSM
The TSSM is a security device designed to protect your Harley from theft. It utilizes a key fob with a unique code to communicate with the motorcycle’s ECM (Engine Control Module). If the TSSM doesn’t recognize the correct code, it will prevent the engine from starting. Common symptoms of a faulty TSSM include a dead start button, a constantly illuminated security lamp, and specific diagnostic trouble codes (DTCs) relating to the TSSM.
Resetting the TSSM PIN
If you’re experiencing issues with your Harley’s security system, attempting a PIN reset is a good first step. The procedure typically involves a sequence of ignition on/off cycles combined with turn signal activations. The exact sequence can vary slightly depending on the model year, so consulting your owner’s manual is crucial. The process usually involves:
- Turning the ignition ON-OFF-ON-OFF-ON.
- Activating the left turn signal twice.
- Activating the right turn signal once.
If successful, the security lamp should indicate a PIN entry mode. If the system doesn’t respond, it could indicate a problem with the TSSM, its antenna, or the wiring. Ensure your key fob is present and has a fresh battery. Repeated failed attempts may temporarily lock the system, requiring a waiting period before trying again.
Diagnosing TSSM Problems
Diagnostic Trouble Codes (DTCs) provide valuable clues about the nature of the problem. Codes like PN-68924-07 often point directly to the TSSM. Other codes, like those related to the speedometer, might indicate a communication issue between the TSSM and other modules. If the PIN reset procedure fails and DTCs point to the TSSM, further investigation is necessary. Checking connections, relays, and the TSSM antenna for damage or corrosion is important. A multimeter can be used to test for continuity in the wiring.
TSSM Replacement and Security System Disablement
If the TSSM is determined to be faulty, replacement is usually the solution. While some older Harley models allowed for self-programming of the TSSM, newer models often require dealer intervention due to barcode scanning requirements for proper synchronization with the ECM. Disabling the security system entirely is generally not recommended as it compromises the anti-theft protection of your motorcycle. However, consulting with a qualified Harley Davidson technician can provide clarity on your specific model and options.
TSM vs. TSSM: Compatibility Considerations
Replacing a TSSM with a regular TSM (Turn Signal Module) might seem like a way to bypass the security system, but it’s not a straightforward swap. The TSM and TSSM have different functionalities and wiring. Compatibility issues can arise, potentially causing problems with other systems on the bike. This modification is generally discouraged unless performed by a skilled technician with a deep understanding of Harley Davidson electrical systems.
In conclusion, troubleshooting a Harley Davidson Tssm requires a systematic approach. Begin with a PIN reset attempt, then utilize diagnostic codes to pinpoint the problem. If the TSSM needs replacing, professional assistance is often necessary for newer models. Always consult your owner’s manual and consider seeking help from a qualified Harley Davidson technician for complex issues.
