Citroen C4 OBD and PIDs
I have a Citroen C4 2009 and I am trying to get some OBD information (basics work on CAN 11 bits, 500 kbps, EOBD data, like speed, rpm,...), but it seems that I am missing something (sensor data and any other stuff that I might monitor/control; it only reports PIDs 1 and 0x1c as available):
1. Does anyone know where to get information on C4-specific OBD PIDs?
2. The C4 OBD connector has 4 non-standard ODB pins (1, 3, 8, 12) besides the CAN (6, 14) pins and the K (7) pin; does anyone know what are they and where to get more information on them?
3. What is the K-line for, if it has also CAN?
Thank you in advance...
The EOBD standard requires EOBD diagnostics to be on Can. The manufacturer protocol does not have to be on Can - no rules there.
Pins 3, 8 and 12 are used for other systems like airbag, abs, etc. I think pin 1 is a switched 12 volt feed.
Seems they have made the same mistake as 10 years ago. No data - although it is required by the EOBD rules.
I think there will be an update for the software - at least in Germany. You need more data to pass the AU-tests (exhaust gas test - like MOT).