OBD - On Board Diagnose

User Tools

Site Tools

You are here: obd » en » can
Trace: • can
en:can

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
en:can [2023/12/13 23:33]
obd_diagnose 		en:can [2023/12/13 23:37] (current)
obd_diagnose
Line 16: Line 16:
 Example of a 500kBit/s high-speed CAN with 11-bit ID (CAN 2.0A) on an engine control unit: Example of a 500kBit/s high-speed CAN with 11-bit ID (CAN 2.0A) on an engine control unit:
  
-{{ :can-signal.jpg?nolink |}}+{{:can-signal.jpg?nolink|}}
  
 As you can see, CAN-H and CAN-L are in phase opposition. The advantage is that this eliminates common-mode interference: As you can see, CAN-H and CAN-L are in phase opposition. The advantage is that this eliminates common-mode interference:
  
-{{ :can-signal-detail.jpg?nolink |}}+{{:can-signal-detail.jpg?nolink|}}
  
 Usually there are several CAN buses in the vehicle, e.g. CAN drive, CAN comfort and CAN infotainment, each of which connects the control units of functional groups. The speeds of the CAN buses installed in the vehicle are usually not the same, the CAN gateway control unit connects the various CAN buses and, in the case of the VAG group, also provides the CAN diagnosis, which is then applied to the [[obd-2-plug]]. Usually there are several CAN buses in the vehicle, e.g. CAN drive, CAN comfort and CAN infotainment, each of which connects the control units of functional groups. The speeds of the CAN buses installed in the vehicle are usually not the same, the CAN gateway control unit connects the various CAN buses and, in the case of the VAG group, also provides the CAN diagnosis, which is then applied to the [[obd-2-plug]].
Line 28: Line 28:
 Example of recorded CAN messages (CAN bus sniffing) with Kaufmann Automotive GmbH KCANMonitor: Example of recorded CAN messages (CAN bus sniffing) with Kaufmann Automotive GmbH KCANMonitor:
  
-{{:kcanmonitor.png?nolink |}}+{{:kcanmonitor.png?nolink|}}
  
 Depending on the speed and bus load of the respective CAN bus, a very large number of messages can accumulate that have to be processed on the bus during "sniffing". To contain the flood of messages, KCANMonitor allows you to set [[can-filter]] directly in the CAN interface. Depending on the speed and bus load of the respective CAN bus, a very large number of messages can accumulate that have to be processed on the bus during "sniffing". To contain the flood of messages, KCANMonitor allows you to set [[can-filter]] directly in the CAN interface.
en/can.1702506825.txt.gz · Last modified: 2023/12/13 23:33 by obd_diagnose

Page Tools

Powered by VCDS.
Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki