https://www.obd.wiki/ 2026-04-30T13:06:28+00:00 https://www.obd.wiki/ https://www.obd.wiki/ttps://www.obd.wiki/lib/tpl/dokuwiki/images/favicon.ico text/html 2023-12-13T23:37:43+00:00 Anonymous https://www.obd.wiki/en:can CAN bus The Controller Area Network (CAN) is a standardised real-time bus for serial data transmission. It belongs to the field buses. The CAN bus was developed by Bosch for automotive applications, but it is also used in the fields of automation and manufacturing technology. For vehicle models from 2008 onwards, OBD-2 is generally used via CAN. text/html 2024-08-26T19:31:44+00:00 Anonymous https://www.obd.wiki/en:control-unit Engine control unit Engine control units for TDI engines are, for example, the Bosch MSA12, MSA15, EDC15, EDC16 or EDC17. Other well-known manufacturers of engine control units are Delphi, Magneti Marelli or Siemens VDO. Many vehicle components such as ABS/ESP, steering column, power steering, ACC, AHK or automatic climate control have their own control units using text/html 2023-05-14T20:43:24+00:00 Anonymous https://www.obd.wiki/en:delphi Delphi Delphi is a manufacturer of engine control units. The Delphi DCM 6.2 is a control module for the TDI engine used in 1.6l and 2.0l motor vehicles of the Volkswagen Group. It is responsible for managing and controlling various aspects of the engine, such as fuel injection, air regulation and other critical parameters. text/html 2025-10-20T13:54:32+00:00 Anonymous https://www.obd.wiki/en:diagnose Diagnosis is used to precisely assign findings - diagnostic signs or symptoms - to a malfunction or symptomatology: obd Tools (OBD diagnostic devices) from various manufacturers are available for diagnosis, e.g. Bosch, Gutmann, Texa, Ross-Tech, Kaufmann Automotive GmbH or CGSULIT. Diagnostics includes reading out the fault memory of the respective control units, deleting the fault memory, coding and adapting control units, measured values of the various installed sensors and values of the cont… text/html 2023-02-04T21:59:40+00:00 Anonymous https://www.obd.wiki/en:doip DoIP DoIP is defined in the standard ISO13400 standard. DoIP stands for Diagnostics over IP. DoIP enables the use of uds data services via TCP/IP or Ethernet. ISO13400 is not a diagnostic protocol, but only an extended transport protocol. Although DoIP defines the transmission of diagnostic packets, the diagnostic services contained are still defined and described by diagnostic protocols such as KWP2000 or UDS. text/html 2023-04-26T21:14:55+00:00 Anonymous https://www.obd.wiki/en:dtc DTC Example for a diagnostic trouble code (DTC). DTC P0505: Fault in the idle charge control system CONDITION FOR FAULT DETECTION - The PCM cannot control the idle speed during the self-test. Diagnostic information - The malfunction indicator light does not come on. - Therefore, no PRESET CODE is available. - Frame data is not available. - The malfunction code is not stored in the PCM memory. text/html 2023-04-26T20:54:08+00:00 Anonymous https://www.obd.wiki/en:edc Electronic Diesel Control The abbreviation EDC stands for Electronic Diesel Control and designates engine control unit families of the manufacturer Bosch. * EDC15, installed e.g. in 1.9l 2V pump-injector TDI of the VAG Group. There is also a variant for common rail injection. text/html 2023-07-08T19:46:48+00:00 Anonymous https://www.obd.wiki/en:egr EGR (exhaust gas recirculation) Exhaust gas recirculation (EGR) plays a central role in the reduction of nitrogen oxides (NOx), which are produced in diesel engines especially under partial load with high excess air. At the expense of fuel consumption and at the cost of increased soot emissions, exhaust gas recirculation replaces part of the fresh air drawn in by exhaust gases. The resulting reduced oxygen content in the cylinder charge ensures a reduction in the nitrogen oxides (NOx) produced … text/html 2024-08-26T19:32:28+00:00 Anonymous https://www.obd.wiki/en:embedded Embedded Embedded in technology refers to the use of embedded systems, which are specially developed computers to fulfil specific tasks within a larger system. These systems are an integral part of the hardware and are often used in everyday devices such as household appliances, cars, medical devices, industrial machines and consumer electronics. text/html 2023-02-04T22:05:41+00:00 Anonymous https://www.obd.wiki/en:eobd EOBD European On Board Diagnostic (EOBD) is the European counterpart to obd-2 . Except for details, it is the same. text/html 2025-01-24T22:16:37+00:00 Anonymous https://www.obd.wiki/en:fault-codes Fault codes (DTC - Diagnostic Trouble Code) The fault memory is a functionality offered by most control units. If a malfunction of the control unit, connected sensors or actuators is detected or implausible data is received from other control units, this is noted in the error memory. text/html 2023-04-26T21:20:22+00:00 Anonymous https://www.obd.wiki/en:fault-log Fault Log Control units contain normally a permanent storage for diagnostic trouble codes (DTC). DTC describe faults (errors) that were diagnosed by the respective control unit. Example: Freitag,20,Januar,2023,17:35:59:29425 VCDS -- Windows-basierter VAG/VAS-Emulator läuft auf Windows 10 x64 VCDS Version: RKS 22.10.0.1 HEX-NET2 CB: 0.4623.4 Datenstand: 20221224 DS344.0 text/html 2024-02-26T17:46:12+00:00 Anonymous https://www.obd.wiki/en:j1939 J1939 The SAE J1939 protocol is used for the diagnosis of (heavy) motor vehicles and utilises the CAN bus. J1939 is used to detect faults in complex systems, to forward them to various subsystems, for calibration functions, safety functions and read/write access to certain text/html 2023-07-23T18:51:46+00:00 Anonymous https://www.obd.wiki/en:j2534 SAE J2534 J2534 is an interface standard developed by the SAE (Society of Automotive Engineers) and mandated by the US EPA (Environmental Protection Agency) for the reprogramming of vehicle ECUs. Its purpose is to create an API (Application Programming Interface) that is adopted by all vehicle manufacturers to allow independent workshops to reprogram ECUs without the need for special tools accessible only to authorised dealers. In short: text/html 2024-05-31T12:53:43+00:00 Anonymous https://www.obd.wiki/en:k-line K-Line The K-Line is a bidirectional bus according to ISO 9141 and ISO 14230-1 in the automotive sector. Data transmission via the K-Line can only be unidirectional at any one time. Only when a message is finished can it be sent in the other direction. text/html 2025-06-13T11:08:14+00:00 Anonymous https://www.obd.wiki/en:lambda Lambda (λ) Lambda (λ) represents the air-fuel ratio in combustion engines relative to the stoichiometric ideal. Calculated as \( \lambda = \frac{\text{Actual Air-Fuel Ratio}}{\text{Stoichiometric Ratio}} \), this dimensionless value is critical for engine management and emissions control. text/html 2025-06-13T15:48:36+00:00 Anonymous https://www.obd.wiki/en:measurement-values Measurement Values Example of measured values from an engine control unit, diagnostic software used: Ross-Tech VCDS®: Display and analysis of recorded measured values with Kaufmann Automotive GmbH KDataScope: text/html 2024-02-15T17:32:02+00:00 Anonymous https://www.obd.wiki/en:nmea NMEA NMEA stands for National Marine Electronics Association, a trade organization for maritime equipment. The NMEA 2000 and NMEA 0183 standards published by this organization provide a basis for the communication of various maritime equipment via CAN (NMEA 2000) or RS422/RS232 (NMEA 0183): text/html 2025-01-24T22:12:22+00:00 Anonymous https://www.obd.wiki/en:obd-2-plug OBD-2 socket (OBD-2 plug) The OBD-2 socket is also known as Diagnostic Link Connector (DLC). Pinout OBD-2 socket (seen from the front, as you see it vehicle installed): * Pin 1 - Manufacturer specific. * Pin 2 - J1850 Bus+ * Pin 3 - Manufacturer specific / Ethernet TX+ ( text/html 2023-07-23T18:25:37+00:00 Anonymous https://www.obd.wiki/en:obd-2 OBD-2 (OBD-II) Vehicle diagnostic protocol for monitoring the emission-related systems of a motor vehicle. Also called OBD-II. EOBD is the European counterpart to OBD-2 (OBD-II). Of particular importance here are exhaust gas recirculation (EGR), catalytic cleaning ( text/html 2025-01-24T22:15:13+00:00 Anonymous https://www.obd.wiki/en:obd-scanner OBD Scanner An OBD scanner (On-Board Diagnostic scanner) is an essential tool in modern vehicle diagnostics. It is used to monitor the electronic systems of a vehicle and diagnose faults. OBD stands for „On-Board Diagnostics,“ which means „vehicle internal fault diagnosis. text/html 2025-06-13T15:47:55+00:00 Anonymous https://www.obd.wiki/en:obd [ OBD symbol] On-Board-Diagnosis (OBD), is used to monitor and diagnose control units in vehicles. The functions are monitored for errors, and in the event of an error, these are stored in an fault log, measurement values and setting options are made available. This enables the workshop to read out any errors that have occurred ( text/html 2023-07-12T19:26:46+00:00 Anonymous https://www.obd.wiki/en:odb ODB ODB is often found on the Internet. Unfortunately, none of the word combinations for which this abbreviation could stand has anything to do with vehicle diagnostics or on-board diagnostics. ODB is only there for those people on the internet who misspell text/html 2023-07-23T19:18:51+00:00 Anonymous https://www.obd.wiki/en:odis ODIS ODIS stands for “Offboard Diagnostic Information System” and is an OBD diagnostic software developed by Volkswagen (VW) for vehicle diagnostics. It is an advanced diagnostic and programming tool used by VW authorised workshops and authorised service partners. text/html 2025-07-08T08:07:04+00:00 Anonymous https://www.obd.wiki/en:sfd Protection of vehicle diagnostics SFD („Schutz der Fahrzeug-Diagnose“) is an access and rights management system of the Volkswagen Group, by which certain diagnostic functions on control units are only permitted with the appropriate rights. SFD was introduced with the MQB2020 (MQBevo) platform. To gain access to modifications/coding, the control unit must be unlocked with a special SFD token, which can currently only be obtained via an official UMB account (GeKo/partner company account). text/html 2023-02-04T21:59:59+00:00 Anonymous https://www.obd.wiki/en:tcp TCP Transmission Control Protocol (TCP), is a connection-oriented network protocol with a link layer. It belongs to the transport layer of the Internet protocols. TCP enables applications to send data transparently and securely with regard to data loss. text/html 2023-04-26T21:05:35+00:00 Anonymous https://www.obd.wiki/en:tdi TDI TDI stands for Turbocharged Direct Injection and a registered trademark of Volkswagen AG for its diesel engines. That means turbocharged with direct diesel injection into the combustion chamber. Compared to prechamber or swirl chamber diesel engines they are characterised by superior efficiency and thus higher performance with lower consumption. text/html 2023-02-04T21:59:49+00:00 Anonymous https://www.obd.wiki/en:udp UDP User Datagram Protocol, or UDP for short, is a minimalist, connectionless network protocol. It belongs to the transport layer of the Internet protocols. UDP enables applications to send datagrams in IP-based computer networks. text/html 2023-02-04T22:00:10+00:00 Anonymous https://www.obd.wiki/en:uds UDS Unified Diagnostic Services (UDS) is a protocol for vehicle diagnostics. It is specified in ISO14229. Messages defined in UDS can be sent to control units, which then perform actions (e.g. firmware update) or provide data (measured values, error memory). text/html 2025-08-06T19:36:42+00:00 Anonymous https://www.obd.wiki/en:vcds VCDS Ross-Tech VCDS® (VAG-COM Diagnostic System) is the leading free OBD tool (diagnostic system) for hobby and workshop tasks on Audi, Cupra, Seat, Skoda and Volkswagen vehicles. The HEX-V2 and HEX-NET diagnostic hardware supports all model years, whether with text/html 2024-10-15T21:52:53+00:00 Anonymous https://www.obd.wiki/en:wwh-obd World Wide Harmonised On-Board Diagnostic WWH-OBD is the standard currently being developed for the worldwide harmonisation of vehicle diagnostics for monitoring the emissions of cars and trucks. It is based on obd-2 and uds . WWH-OBD stands for World Wide Harmonised On-Board-Diagnostic.