VAG TP 2.0 full list of AT commands

Question

I try to find DTCs from different ECUs in the Skoda Rapid 2009 model. I use OBDLink SX (elm 327 chip) and Putty (similar to HyperTerminal)

https://jazdw.net/tp20 This link gives a list of commands that I should request the ECU of any VAG car, because they work on the TP 2.0 protocol. But I can not answer. He always gives me NO DATA. I think that I am missing the “AT” commands, for example, a timeout or a wake-up message can be set.

>at z at z ELM327 v2.1 >at h1 at h1 OK >at l1 at l1 OK >at s1 at s1 OK >at pb c001 at pb c001 OK >at d1 at d1 OK >at sp b at sp b OK >at sh 200 at sh 200 OK >05 c0 00 10 00 03 01 1 05 c0 00 10 00 03 01 1 205 7 00 D0 00 03 68 07 01 >03 c0 00 10 00 03 01 1 03 c0 00 10 00 03 01 1 203 7 00 D0 00 03 90 07 01 >at sh 768 at sh 768 OK >at cra 300 at cra 300 OK >a0 0f 8a ff 32 ff a0 0f 8a ff 32 ff NO DATA >a0 0f 8a ff 32 ff 1 a0 0f 8a ff 32 ff 1 NO DATA 

Can someone help me list step-by-step commands to get DTCs from engine, ABS, Airbag, EPS, etc. Online resources will also be useful.

Answer 1

It looks like you did not set the correct protocol settings (sp / pb) for me. Are you sure of the parameters and / or the correct protocol? What OBD hex commands are you trying to send there?

PS it should be a comment, but due to lack of reputation (50) I can’t do one ...

UPDATE

If you get

NO DATA

ELM documentation states:

Not all requests are supported by each vehicle. You may not have the data to provide or you were never intended to respond to this PID (or SID). If you are sure that the car should answer this request, then make sure that the IC ELM timeout is not too short. Try issuing the AT ST FF command, so the chip waits a full second before stating that there is no data. Maybe your ECU only has higher priority things to look out for, and it takes more time for you.

Maybe some ECU is responding too slowly. Try the suggested command for a longer timeout and report it. Also check if the expected output for these ECUs is possible (in the end!).

Answer 2

This is a site for exchanging software packages as such, a discussion of DTC is much more on the topic at https://mechanics.stackexchange.com

However, I would recommend that you first initialize the “standard” configuration sequence (ie, ATZ, ATSP0, 0100, ATDPN . Only after that it is recommended to use advanced commands.