[UDS unified diagnostic service] IV. typical diagnostic service (2) - data transmission function unit

Four 、 Diagnose typical services （2）— Data transmission function unit

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Diagnostic service of each functional unit ：

• Diagnosis and communication management function unit
• Data transmission function unit
• Read fault information function unit （ Storage data transmission function unit ）
• Online programming function unit （ Upload and download function unit ）
• function / Component test function unit （ Routine function unit ）
• Input / output control unit （0x2F）

This article mainly explains “ Data transmission function unit ”, For the rest, see other articles .

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“ Data transmission function unit ” Services included ：

（1）ReadDataByldentifier (0x22) service

• Data identifier DID(Data ldentifier)
  • 2 Byte parameters
• DID The format of the represented parameter is determined by Agreed by the manufacturer

Request message ：

Positive response ：