CAN Messages and the 5EAT

west_minist · **Posted:** Sun Jan 25, 2015 2:43 pm

Hello:

Do anyone knows if the CAN messages in Subaru seen by logging are the same messages a CAN Sniffer will pick up?

dschultz · **Posted:** Sun Jan 25, 2015 5:51 pm

Yes, but those Logging messages are only present when a Logger is actively querying the ECU. Otherwise all you will see is inter-module CAN messages at specific intervals.

west_minist · **Posted:** Sun Jan 25, 2015 6:01 pm

Ok I need a sniffer. Any CAN msg release I can get the codes for?

Sasha_A80 · **Posted:** Sun Jan 25, 2015 6:47 pm

CAN sniffer gets all messages sent to high speed CAN bus by ECU, TCM, VDC\ABS regarless of diagnostic queries.
Those messages are usually sent with 20 and 100 ms periods.

You may start here
https://subdiesel.wordpress.com/ecu-ana ... -messages/

It may be sufficient for your task just to listen to those messages with applicable CAN IDs.

west_minist · **Posted:** Sun Jan 25, 2015 6:58 pm

Many thanks. Will keep all posted if I can do development

west_minist · **Posted:** Sun Jan 25, 2015 10:44 pm

Sasha,

What setup do you used for sniffing?

dschultz · **Posted:** Mon Jan 26, 2015 3:37 am

The OpenPort 2 will do it if you follow the tutorial in the SubDiesel page.
https://subdiesel.wordpress.com/2011/05 ... -tutorial/
You'll need to tweak the message filter settings to be able to listen in on all the CAN messages.

There's also a sample app in the \OpenECU\EcuFlash\samples\canlogger directory you can compile that allows you to use the Openport 2 as a sniffer.

west_minist · **Posted:** Mon Jan 26, 2015 3:56 am

Thanks mate.

Sasha_A80 · **Posted:** Mon Jan 26, 2015 1:35 pm

I do use a homebrew one as usual.
The content of CAN messages may be discoverred thru the ecu code disassembled as was done by Subaru Diesel team.

west_minist wrote:

Sasha,

What setup do you used for sniffing?

west_minist · **Posted:** Mon Jan 26, 2015 1:38 pm

I would expect that, but not a programmer. I need to control the tranny for a 10 second car. Its a build tranny. We want to use ems.

Sasha_A80 · **Posted:** Mon Jan 26, 2015 5:34 pm

If you use Denso TCM for Subaru tranny then subdiesel team findings will probably fill your needs.

west_minist · **Posted:** Mon Jan 26, 2015 5:40 pm

Well planning not too.

dschultz · **Posted:** Mon Jan 26, 2015 10:51 pm

I'm going to write a RR Logger plugin for this adapter.
http://www.fischl.de/usbtin/
primarily for AEMnet, but I'm sure it could server other purposes too.

west_minist · **Posted:** Mon Jan 26, 2015 11:06 pm

That would be great. We have the best cable n the best logging program.

It would be a while until I can access the transmission. The car is down and being built.

west_minist · **Posted:** Sat Jun 20, 2015 10:24 pm

Hello everyone. We are getting close to the car being up and I have found a lot of maps in regards to being close to the calculated engine torque.

On another note, I will be close to sampling the CAN messages to see possibilities. We really want to run ems but I am seeing some good work with the megasquirt with someone on the legacygt forum.

RomRaider

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CAN Messages and the 5EAT

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