: Clear/reset emission-related diagnostic information.
Paper Overview: Enhanced E/E Diagnostic Test Modes (Eady 157) 1. Scope and Objective eys157.part2.rar
The primary goal of Eady 157 is to define the communication protocols and data formats for . It ensures that vehicle manufacturers and aftermarket tool developers use a standardized language to retrieve emissions-related data, diagnostic trouble codes (DTCs), and real-time sensor information. 2. Technical Requirements : Clear/reset emission-related diagnostic information
: Request current powertrain diagnostic data (live data stream). diagnostic trouble codes (DTCs)
: Standards governing physical layers and connector pins (e.g., J1962).
Eady 157 builds upon and references several industry-critical publications, including:
The standard specifies how electronic control units (ECUs) should handle requests from external test equipment. Key technical areas include: