en:obd
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| 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. | 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 ([[fault codes]] ) from the respective error memories and to check the correct function via [[measurement values]] . | + | This enables the workshop to read out any errors that have occurred ([[fault codes]]) from the respective error memories and to check the correct function via [[measurement values]]. |
| An OBD system consists of at least one control unit that uses measured values from various sensors (e.g. oxygen sensors) to control actuators (e.g. injection nozzles) to achieve the desired behaviour. A modern vehicle can contain countless ECUs, each supporting hundreds of parameters that can be accessed via the DLC (Diagnostic Link Connector, [[obd-2-plug]] ) using an OBD diagnostic device. | An OBD system consists of at least one control unit that uses measured values from various sensors (e.g. oxygen sensors) to control actuators (e.g. injection nozzles) to achieve the desired behaviour. A modern vehicle can contain countless ECUs, each supporting hundreds of parameters that can be accessed via the DLC (Diagnostic Link Connector, [[obd-2-plug]] ) using an OBD diagnostic device. | ||
| - | Apps are available for mobile devices that display real-time data from the respective ECUs (virtual instrument panel). One example is the OBD app Drivedeck. For Microsoft Windows, for example, there is the OBD-2 software KOBD2Check and [[vcds]] for manufacturer-specific OBD on Audi, Seat, Skoda and VW. An OBD diagnostic device with its own display, which is independent of basic devices such as mobile phones, PCs or laptops, is practical for [[diagnosis]] in the workshop. | + | Apps are available for mobile devices that display real-time data from the respective ECUs (virtual instrument panel). One example is the OBD app Drivedeck. For Microsoft Windows, for example, there is the OBD-2 software KOBD2Check and [[VCDS]] for manufacturer-specific OBD on Audi, Seat, Skoda and VW. An OBD diagnostic device with its own display, which is independent of basic devices such as mobile phones, PCs or laptops, is practical for [[diagnosis]] in the workshop. |
| - | The readout of errors or measured values in the respective [[control unit]] via OBD is usually done by [[can]] bus or [[k-line]] , in older vehicles more rarely also by PWM (pulse width modulation) or VPW (variable pulse width). Next-generation vehicles use Ethernet ([[doip]] ). | + | The readout of errors or measured values in the respective [[control unit]] via OBD is usually done by [[CAN]] bus or [[K-Line]] , in older vehicles more rarely also by PWM (pulse width modulation) or VPW (variable pulse width). Next-generation vehicles use Ethernet ([[DoIP]] ). |
| - | From 2021, models from Audi, Seat, Skoda and Volkswagen will use the mechanism [[sfd]] to regulate access to control units. | + | From 2021, models from Audi, Seat, Skoda and Volkswagen will use the mechanism [[SFD]] to regulate access to control units. |
| - | [[obd-2]] stands for On Board Diagnostics of the second development stage. OBD-2 is available as [[eobd]] in the EU for the following vehicles: | + | [[OBD-2]] stands for On Board Diagnostics of the second development stage. OBD-2 is available as [[EOBD]] in the EU for the following vehicles: |
| * from 1.1.2000 for petrol cars | * from 1.1.2000 for petrol cars | ||
| * from 1.1.2003 for [[https:// | * from 1.1.2003 for [[https:// | ||
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| * from 1.1.2017 for motorbikes | * from 1.1.2017 for motorbikes | ||
| - | Corresponding vehicles have a [[obd-2-buchse]] for connecting a diagnostic system. However, the socket itself is not an indication of the OBD-2 capability of the vehicle, because it was often also used on vehicles that only support manufacturer-specific diagnostics. | + | Corresponding vehicles have a [[obd-2-plug]] for connecting a diagnostic system. However, the socket itself is not an indication of the OBD-2 capability of the vehicle, because it was often also used on vehicles that only support manufacturer-specific diagnostics. |
| - | Efforts are being made to harmonise emission-related diagnostics worldwide; the corresponding standard [[wwh-obd]] has been in development since 2014. | + | Efforts are being made to harmonise emission-related diagnostics worldwide; the corresponding standard [[WWH-OBD]] has been in development since 2014. |
| Various providers offer [[obd-help]] , which goes beyond the content of this wiki. [[https:// | Various providers offer [[obd-help]] , which goes beyond the content of this wiki. [[https:// | ||
en/obd.1682536227.txt.gz · Last modified: 2023/04/26 21:10 by obd_diagnose
