SIDs (Serivce Identifiers)

💡

Serivce Identifiers : 차량의 UDS (Unified Diagnostic Services, ISO 14229) 프로토콜에서 사용되는 주요 명령어들로, 특정 진단 서비스를 호출하는 데 사용됩니다. 각 SID는 특정 진단 기능을 수행하기 위한 요청을 나타내며, ECU(Electronic Control Unit)가 이 요청을 수신하고 해당 서비스에 대해 적절한 응답을 반환합니다.

• 차량의 ECU와 진단 도구 간의 통신에서 사용되는 특정 명령 또는 서비스를 식별하는 고유한 코드
• 각 SID는 ECU가 수행해야 할 진단 작업을 정의
• UDS 프로토콜에서 SIDs는 특정 기능을 요청하거나 실행하기 위해 사용

UDS SID (request)	UDS SID (response)	Service	Details	Sub function types	Sub function
0x10	0x50	Diagnostic Session Control	Control which UDS services are available	Diagnostic session type	0x01 - 0x04
0x11	0x51	ECU Reset	Reset the ECU (“hard reset”, “key off”, “soft reset”)	Reset type	0x01 - 0x05
0x27	0x67	Security Access	Enable use of security-critical services via authentication	Security access type	0x01 - 0x10
0x28	0x68	Communication Control	Turn sending/receiving of messages on/off in the ECU	Control type	0x00 - 0x03
0x29	0x69	Authentication	Enable more advanced authentication vs. 0x27 (PKI based exchange)	N/A	<
0x3E	0x7E	Tester Present	Send a “heartbeat” periodically to remain in the current session	“Zero Sub function”	0x00
0x83	0xC3	Access Timing Parameters	View/modify timing parameters used in client/server communication	Timing parameter access type	0x01 - 0x02
0x84	0xC4	Secured Data Transmission	Send encrypted data via ISO 15764 (Extended Data Link Security)	N/A	<
0x85	0xC5	Control DTC Settings	Enable/disable detection of errors (e.g. used during diagnostics)	DTC setting type	0x01 - 0x02
0x86	0xC6	Response On Event	Request that an ECU processes a service request if an event happens	Event type	0x00 - 0x02
0x87	0xC7	Link Control	Set the baud rate for diagnostic access	Link control type	0x01 - 0x05
0x22	0x62	Read Data By Identifier	Read data from targeted ECU - e.g. VIN, sensor data values etc.	N/A	<
0x23	0x63	Read Memory By Address	Read data from physical memory (e.g. to understand software behavior)	N/A	<
0x24	0x64	Read Scaling Data By Identifier	Read information about how to scale data identifiers	N/A	<
0x2A	0x6A	Read Data By Identifier Periodic	Request ECU to broadcast sensor data at slow/medium/fast/stop rate	N/A	<
0x2C	0x6C	Dynamically Define Data Identifier	Define data parameter for use in 0x22 or 0x2A dynamically	Definition type	0x01 - 0x03
0x2E	0x6E	Write Data By Identifier	Program specific variables determined by data parameters	N/A	<
0x3D	0x7D	Write Memory By Address	Write information to the ECU’s memory	N/A	<
0x14	0x54	Clear Diagnostic Information	Delete stored DTCs	N/A	<
0x19	0x59	Read DTC Information	Read stored DTCs, as well as related information	Report type	0x01 - 0x0D
0x2F	0x6F	Input Output Control By Identifier	Gain control over ECU analog/digital inputs/outputs	N/A	<
0x31	0x71	Routine Control	Initiate/stop routines (e.g. self-testing, erasing of flash memory)	Routine control type	0x01 - 0x03
0x34	0x74	Request Download	Start request to add software/data to ECU (incl. location/size)	N/A	<
0x35	0x75	Request Upload	Start request to read software/data from ECU (incl. location/size)	N/A	<
0x36	0x76	Transfer Data	Perform actual transfer of data following use of 0x74/0x75	N/A	<
0x37	0x77	Request Transfer Exit	Stop the transfer of data	N/A	<
0x38	0x78	Request File Transfer	Perform a file download/upload to/from the ECU	N/A	<
0x7F	<	Negative Response	Sent with a Negative Response Code when a request cannot be handled	N/A	<

Diagnostic Session Control (0x10)

• ECU가 진단 모드로 전환
• 차량의 정상 모드에서 테스트 모드로 전환할 때 사용

📝

0x10 - 진단 세션을 시작하여 ECU를 테스트 모드로 전환

Diagnostic session type (sub function value)	Diagnostic session	Description
0x01	Default Session	On Start of ECU, ECU runs in to default session.
0x02	Programming Session	Used to upload software.
0x03	Extended Diagnostic Session	Used to unlock additional diagnostic functions.
0x04	Safety System Diagnostic System	Used to test all safety critical diagnostic functions.

sequenceDiagram
  participant PduR
  participant Dsl
  participant Dsd
  participant Dsp
  PduR ->>+ Dsl: Dcm_TpRxIndication(PduIdType,<br>Std_ReturnType)
  activate PduR
  Dsl->>+ Dsd: Data_Indication_functionality()
  Dsd->>+ Dsp: DiagnosticSessionControl service<br>interpreter()
  Dsp -->>- Dsd: DiagnosticSessionControl service<br>interpreter()
  Dsd -->>- Dsl: Data_Indication_functionality()
  Dsl -->>- PduR: Dcm_TpRxIndication()
  PduR ->>+ Dsl: Dcm_TpTxConfirmation(PduIdType,<br>Std_ReturnType)
  Dsl->>+ Dsd: Data_Confirmation_functionality()
  Dsd->>+ Dsp: DspInternal_DcmConfirmation(<br>Dcm_IdContextType, PduIdType,<br>Dcm_ConfirmationStatusType)
  Dsp -->>- Dsd: DspInternal_DcmConfirmation()
  Dsd -->>- Dsl: Data_Confirmation_functionality()
  Dsl -->>- PduR: Dcm_TpTxConfirmation()
  deactivate PduR

ECU Reset (0x11)

• ECU를 재설정
• 하드 리셋, 키 오프 또는 소프트 리셋을 포함

📝

0x11 - 하드 리셋 명령을 보내 ECU를 재부팅

Reset type (sub function value)	Reset	Description
0x01	Hard Reset	Completely reboots the ECU.
0x02	Key Off On Reset	Simulates turning the key off and on, resetting the ECU.
0x03	Soft Reset	Resets the ECU software without a full reboot.
0x04	Enable Rapid Power Shut Down	Activates rapid power shut down.
0x05	Disable Rapid Power Shut Down	Deactivates rapid power shut down.

Security Access (0x27)

• 보안이 중요한 서비스를 사용하기 위해 인증을 활성화

📝

0x27 - ECU 보안 접근을 위해 암호화된 키를 요청

Security Access type (Sub function value)	Security Access	Description
0x01 0x03 0x05 0x07 0x09 0x0B 0x0D 0x0F	Request Seed	Requests a seed for security access.
0x02 0x04 0x06 0x08 0x0A 0x0C 0x0E 0x10	Send Key	Sends a key corresponding to the requested seed.

sequenceDiagram
  participant PduR
  participant Dsl
  participant Dsd
  participant Dsp
  participant Dcm User
  
  critical Request Seed
  PduR ->>+ Dsl: Dcm_TpRxIndication(PduIdType,<br>Std_ReturnType)
  activate PduR
  Dsl->>+ Dsd: Data_Indication_functionality()
  Dsd->>+ Dsp: SecurityAccess service<br>interpreter()
  Dsp ->>+ Dcm User: GetSeed(Std_ReturnType,<br>uint8*, Dcm_OpStatusType, uint8*,<br>Dcm_NegativeResponseCodeType*)
  Dcm User -->> Dsp: GetSeed()
	deactivate Dcm User
	deactivate Dsp
	deactivate Dsd
	deactivate Dsl
	end
  critical Compare Key
  PduR ->>+ Dsl: Dcm_TpRxIndication(PduIdType,<br>Std_ReturnType)
  activate PduR
  Dsl->>+ Dsd: Data_Indication_functionality()
  Dsd->>+ Dsp: SecurityAccess service<br>interpreter()
  Dsp ->>+ Dcm User: CompareKey(Std_ReturnType,<br>uint8*, Dcm_OpStatusType)
  Dcm User -->>- Dsp: Dcm_CompareKey()
  Dsp ->>+ Dsl: Dcm_SetSecurityLevel(Dcm_SecLevelType)
	deactivate Dsl
	deactivate Dsd
  Dsl -->> Dsp : Dcm_SetSecurityLevel()
	deactivate Dsp
	deactivate Dsl
  deactivate PduR
	end

Communication Control (0x28)

• ECU의 메시지 송수신 기능을 켜거나 끔

📝

0x28 - ECU의 모든 통신을 비활성화

Control type (Sub function value)	Control	Description
0x00	Enable Rx and Tx	Enables both reception (Rx) and transmission (Tx).
0x01	Enable Rx and Disable Tx	Enables reception and disables transmission.
0x02	Disable Rx and Enable Tx	Disables reception and enables transmission.
0x03	Disable Rx and Tx	Disables both reception and transmission.

Authentication (0x29)

• 더 발전된 인증 절차를 사용하여 ECU에 접근

📝

0x29 - PKI 기반 인증을 사용하여 ECU 접근을 요청

Tester Present (0x3E)

• 현재 세션을 유지하기 위해 주기적으로 “Heart Beat” 메시지를 전송

📝

0x3E - ECU가 현재 세션을 종료하지 않도록 Heart Beat를 전송

(Sub function value)	function	Description
0x00	Zero Sub-Function	Indicates the tester is present.

sequenceDiagram
  participant PduR
  participant Dsl
  participant Dsd
  participant Dsp
  
  critical Tester Present with positive response
  PduR ->>+ Dsl: Dcm_TpRxIndication(PduIdType,<br>Std_ReturnType)
  activate PduR
  Dsl->>+ Dsd: Data_Indication_functionality()
  Dsd->>+ Dsp: TesterPresent service<br>interpreter()
  Dsp -->>- Dsd: TesterPresent service<br>interpreter()
  Dsd -->>- Dsl: Data_Indication_functionality()
  Dsl -->>- PduR: Dcm_TpRxIndication()
	end
  critical Tester Present with negative response
  PduR ->>+ Dsl: Dcm_TpRxIndication(PduIdType,<br>Std_ReturnType)
  Dsl->>+ Dsd: Data_Indication_functionality()
  Dsd->>+ Dsp: TesterPresent service<br>interpreter()
  Dsp -->>- Dsd: TesterPresent service<br>interpreter()
  Dsd -->>- Dsl: Data_Indication_functionality()
  Dsl -->>- PduR: Dcm_TpRxIndication()
  deactivate PduR
	end

Access Timing Parameters (0x83)

• 클라이언트/서버 통신에 사용되는 타이밍 매개변수를 조회하거나 수정

📝

0x83 - 타이밍 매개변수를 수정하여 통신 지연 시간을 줄임

Timing parameter access Type (Sub function value)	Timing parameter access	Description
0x01	Set Timing Parameters	Sets specific timing parameters.
0x02	Get Timing Parameters	Retrieves current timing parameters.

Secured Data Transmission (0x84)

• ISO 15764를 통해 암호화된 데이터를 전송

📝

0x84 - 암호화된 진단 데이터를 ECU에 전송

Control DTC Settings (0x85)

• 오류 감지를 활성화하거나 비활성화

📝

0x85 - 특정 오류 코드 감지를 비활성화

DTC Setting type (Sub function value)	DTC Setting	Description
0x01	DTC Setting On	Activates DTC setting.
0x02	DTC Setting Off	Deactivates DTC setting.

Response On Event (0x86)

• 이벤트가 발생했을 때 ECU가 서비스 요청을 처리하도록 요청

📝

0x86 - 특정 조건이 만족되면 ECU가 응답하도록 설정

Event type (Sub function value)	Event	Description
0x00	Report Events	Sends a response when specified events occur.
0x01	Clear Event Reporting	Disables event reporting.
0x02	Report Events with Enhanced Data	Sends a response with additional data when events occur.

Link Control (0x87)

• 진단 액세스를 위한 통신 속도를 설정

📝

0x87 - ECU와의 통신 속도를 500 kbps로 설정

Link control type (Sub function value)	Link control	Description
0x01	Verify Link Control	Verifies the link status.
0x02	Transition to Communication Mode	Switches to communication mode.
0x03	Transition to Link Control Mode	Switches to link control mode.
0x04	Transition to Sleep Mode	Switches to sleep mode.
0x05	Terminate Communication	Ends the communication session.

Read Data By Identifier (0x22)

• 타겟 ECU로부터 데이터를 읽어옴

📝

0x22 - 차량의 VIN 번호를 ECU로부터 읽어옴

Read Memory By Address (0x23)

• 타켓 ECU로부터 물리적 메모리에서 데이터를 읽어옴

📝

0x23 - ECU의 특정 메모리 주소에서 데이터를 읽어옴

Read Scaling Data By Identifier (0x24)

• 데이터 식별자의 스케일링 정보를 읽어옴

📝

0x24 - 센서 데이터의 스케일링 정보를 조회

Read Data By Identifier Periodic (0x2A)

• ECU에 센서 데이터를 주기적으로 방송하도록 요청

📝

0x2A - ECU가 센서 데이터를 초당 1회 주기로 방송하도록 설정

Dynamically Define Data Identifier (0x2C)

• 0x22 또는 0x2A에서 동적으로 사용할 데이터 매개변수를 정의

📝

0x2C - 새로운 데이터 식별자를 동적으로 정의

Definition type (Sub function value)	Definition	Description
0x01	Define By Identifier	Defines a data identifier dynamically using existing identifiers.
0x02	Define By Memory Address	Defines a data identifier dynamically using memory addresses.
0x03	Clear Dynamically Defined Data Identifier	Clears previously defined data identifiers.

Write Data By Identifier (0x2E)

• 데이터 매개변수에 의해 결정된 특정 변수를 프로그래밍

📝

0x2E - ECU의 특정 설정 값을 업데이트

Write Memory By Address (0x3D)

• ECU 메모리에 정보를 작성

📝

0x3D - ECU의 특정 메모리 위치에 데이터를 작성

Clear Diagnostic Information (0x14)

• 저장된 DTC(진단 트러블 코드)를 삭제

📝

0x14 - ECU에서 모든 DTC를 삭제

Read DTC Information (0x19)

• 저장된 DTC와 관련 정보를 읽어옴

📝

0x19 - ECU에서 현재 저장된 모든 DTC를 읽어옴

Report type (sub function value)	Report	Description
0x01	Number of DTC by Status Mask	Reports the number of DTCs matching the status mask.
0x02	DTC by Status Mask	Reports the DTCs matching the status mask.
0x03	DTC Snapshot Identification	Reports the identification of DTC snapshots.
0x04	DTC Snapshot Record by DTC Number	Reports the snapshot records by DTC number.
0x05	DTC Stored Data by Record Number	Reports the stored DTC data by record number.
0x06	DTC Extended Data Record by DTC Number	Reports the extended data records by DTC number.
0x07	Number of DTC by Severity Mask Record	Reports the number of DTCs matching the severity mask.
0x08	DTC by Severity Mask Record	Reports the DTCs matching the severity mask.
0x09	Severity Information of DTC	Reports the severity information of a specific DTC.
0x0A	Supported DTC	Reports the supported DTCs.
0x0B	First Failed DTC	Reports the first failed DTC.
0x0C	First Confirmed DTC	Reports the first confirmed DTC.
0x0D	Most Recent Failed DTC	Reports the most recent failed DTC.
0x0E	Most Recent Confirmed DTC	Reports the most recent confirmed DTC.
0x0F	Mirror Memory DTC by Status Mask	Reports the mirror memory DTCs matching the status mask.
0x10	Mirror Memory DTC by DTC Number	Reports the mirror memory DTCs by DTC number.
0x11	Number of Mirror Memory DTC by Status Mask	Reports the number of mirror memory DTCs matching the status mask.
0x12	Number of Emissions OBD DTC by Status Mask	Reports the number of emissions-related OBD DTCs matching the status mask.
0x13	Emissions OBD DTC by Status Mask	Reports the emissions-related OBD DTCs matching the status mask.
0x14	DTC Fault Detection Counter	Reports the DTC fault detection counter.
0x15	DTC with Permanent Status	Reports the DTCs with permanent status.
0x16	DTC Extended Data Record by Record Number	Reports the extended data records by record number.
0x17	User Defined Memory DTC by Status Mask	Reports the user-defined memory DTCs matching the status mask.
0x18	User Defined Memory DTC Snapshot by Number	Reports the user-defined memory DTC snapshots by number.
0x19	User Defined Memory DTC Record by Number	Reports the user-defined memory DTC records by number.
0x42	WWH-OBD DTC by Status Mask Record	Reports the WWH-OBD DTCs matching the status mask.
0x55	WWH-OBD DTCs with Permanent Status	Reports the WWH-OBD DTCs with permanent status.

Input Output Control By Identifier (0x2F)

• ECU 아날로그/디지털 입력/출력을 제어

📝

0x2F - 특정 출력 핀을 활성화

Routine Control (0x31)

• 테스트 루틴을 시작하거나 중지합니다 (예: 자가 테스트, 플래시 메모리 지우기)

📝

0x31 - ECU의 자가 테스트 루틴을 시작

Routine control type (Sub function value)	Routine control	Description
0x01	Start Routine	Starts a specified routine.
0x02	Stop Routine	Stops a specified routine.
0x03	Request Routine Results	Requests the results of a specified routine.

Request Download (0x34)

• ECU에 소프트웨어/데이터 추가를 요청합니다 (위치/크기 포함)

📝

0x34 - ECU에 새로운 소프트웨어를 다운로드

Request Upload (0x35)

• ECU에서 소프트웨어/데이터를 읽어오도록 요청합니다 (위치/크기 포함)

📝

0x35 - ECU에서 데이터를 업로드

Transfer Data (0x36)

• 0x74/0x75 명령 후 실제 데이터를 전송

📝

0x36 - ECU로 데이터 전송을 수행

Request Transfer Exit (0x37)

• 데이터 전송을 중지

📝

0x37 - 현재 진행 중인 데이터 전송을 중지

Request File Transfer (0x38)

• ECU와의 파일 다운로드/업로드를 수행

📝

0x38 - ECU와 파일 업로드를 수행

Negative Response (0x7F)

• 요청이 처리될 수 없을 때 부정 응답 코드와 함께 전송

📝

0x7F - 요청된 서비스가 지원되지 않는 경우 부정 응답을 반환

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NRC (Negative Response Code)