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Diagnostics

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UDS meaning es un protocolo de diagnóstico estándar en la industria automotriz (ISO 14229), utilizado para que una herramienta de diagnóstico (ej. scanner o software) se comunique con las ECUs de un vehículo para leer información, borrar errores, programar, etc.
UDS Frame | PCI | SID | PARAMETROS / DATOS/subfunc |
PCI Protocol Control Information (control ISO-TP, si el mensaje es largo)
SID Service Identifier (dice QUÉ servicio UDS quieres usar)
Parámetros/Datos Datos o subfunción, depende del servicio
0x10 Diagnostic Session Control
0x10 subf 0x01: Default 0x02: Programming 0x03: Extended
Diagnostic Session Control meaning Initiate/Change diagnostic session modes
ECU Reset 0x11
ECU Reset meaning Command ECU to perform a reset
Security Access 0x27
Security Access meaning Grant secured access for programming/unlock features
Communication Control meaning Enable/Disable ECU communication
Communication Control 0x28
Tester Present meaning Keep session alive (prevents ECU timeout)
Tester Present 0x3E
Read Data By Identifier 0x22
Read Data By Identifier meaning Read values of variables or data objects
Write Data By Identifier 0x2E
Write Data By Identifier meaning Write values to variables or data objects
Read DTC Information 0x19
Read DTC Information meaning Read Diagnostic Trouble Codes
Steps for diagnostics 1. Connect a diagnostic tester to the vehicle’s OBD-II port 2. Set CAN parameters (baudrate, usually 500 kbit/s) 3. Send: “Diagnostic Session Control” 4. (Optional) Security Access
Created by: yizuztineo
 

 



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