The file appears to be a compressed archive containing technical documentation, specifically Eady 157 , which is a widely referenced standards document regarding Enhanced E/E (Electric/Electronic) Diagnostic Test Modes for automotive systems .
: Request current powertrain diagnostic data (live data stream). eys157.part2.rar
: The required response times for an ECU to acknowledge a tester's request to ensure reliable data flow. 3. Diagnostic Test Modes The file appears to be a compressed archive