Modern vehicles are equipped with a multitude of electronic control units, each managing specific systems within the car. One such system is the Electronic Power Steering (EPS), which enhances driving comfort and safety. When issues arise within the EPS, they are often signaled by diagnostic trouble codes (DTCs). A common question among car owners and DIY mechanics is whether standard OBD2 readers can effectively scan and interpret these EPS codes.
While OBD2 (On-Board Diagnostics II) readers are excellent tools for diagnosing engine and emissions-related problems, their capabilities are somewhat limited when it comes to specialized systems like EPS. Typically, generic OBD2 scanners are designed to access powertrain-related DTCs as mandated by standardized protocols. They may not always have the ability to communicate with the EPS module to retrieve its specific fault codes.
However, there are methods to access EPS DTCs, particularly in certain vehicle models. One approach, often discussed within automotive enthusiast communities, involves using the Service Check System (SCS) method. This technique, sometimes referred to as the “jumper blinky trick,” allows users to bypass the need for a professional-grade scan tool in some cases. It involves manually grounding a specific pin in the OBD2 port, which can then trigger the vehicle’s system to display DTCs through blinking lights on the dashboard.
It’s important to note that the effectiveness and applicability of the SCS method can vary depending on the vehicle’s make, model, and year. For instance, anecdotal evidence suggests it may be applicable to Honda models up to the mid-2000s. Vehicles with more modern communication protocols, such as those implemented after the mid-2000s, particularly those using Extended CAN protocols, may not be compatible with this older SCS method for EPS code retrieval.
In conclusion, while standard OBD2 readers are invaluable for many car diagnostics, their ability to scan EPS codes is not guaranteed. Exploring alternative methods like the SCS procedure might offer a solution for some older vehicles. For comprehensive EPS diagnostics and reliable code reading, especially in newer models, consulting a professional scan tool or a qualified mechanic is generally recommended to ensure accurate assessment and repair of your vehicle’s steering system.
