Keyword Protocol 2000
Keyword Protocol 2000, abbreviated KWP2000, is a
Commonly used physical layers
One underlying physical layer used for KWP2000 is identical to
When implemented on a K-line physical layer KWP2000 requires special wakeup sequences: 5-baud wakeup and fast-initialisation. Both of these wakeup methods require timing critical manipulation of the K-line signal.
KWP2000 is also compatible on
Using KWP2000 on CAN with ISO 15765 Transport/Network layers is most common. Also using KWP2000 on CAN does not require the special wakeup functionality.
KWP2000 can be implemented on CAN using just the service layer and session layer (no header specifying length, source and target addresses is used and no checksum is used); or using all layers (header and checksum are encapsulated within a CAN frame). However using all layers is overkill, as ISO 15765 provides its own Transport/Network layers.
ISO 14230
ISO 14230 Road vehicles – Diagnostic systems – Keyword Protocol 2000 is structured as follows:
- ISO 14230-1 Physical layer
- ISO 14230-2 Data link layer
- ISO 14230-3 Application layer
- ISO 14230-4 Requirements for emission-related systems
References
- ISBN 9781593277031. Retrieved 10 May 2018.