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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » Preferred OBD Protocol?

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Author	Topic: Preferred OBD Protocol?

Pedro123

Member
Posts: 14

Preferred OBD Protocol?
on: March 5, 2019 (GMT)

Still trying to get more sensor readings – not many so far and trying to troubleshoot. Vote for better user manual.

In OBD2 Vehicle Editor – Preferred OBD2 Protocol, I have selected “Automatic – Through Protocol Scan” But I can also select from a number of options.

Does it matter?

2017 Hyundai Sonata. Under hood sticker says: “OBD CA II “

Capp777

Member
Posts: 2993

Re: Preferred OBD Protocol?
on: March 5, 2019 (GMT)

Your adapter will automatically search for
the protocol used by your vehicle. Once it
is known you can set the correct protocol
in the vehicle profile. (This may help prevent
unexpected results from protocols not
supported by your vehicle).

You can look under Adapter Status icon
information to see protocol in use.

Some vehicles have obd pids on multiple
ECUs so it might be useful to create a
custom pid for 0100 with headers ON
ATH1 to see if more than one module
responds.

Pedro123

Member
Posts: 14

Re: Preferred OBD Protocol?
on: March 5, 2019 (GMT)

Thanks for responding.

“Some vehicles have obd pids on multiple
ECUs so it might be useful to create a
custom pid for 0100 with headers ON
ATH1 to see if more than one module
responds.”

I no clue how to do this.

Capp777

Member
Posts: 2993

Re: Preferred OBD Protocol?
on: March 5, 2019 (GMT)

Create a custom pid using
mode/pid: 0100
header: Auto

There is a recent thread which describes
how to create custom pid…

https://torque-bhp.com/forums/?wpforumaction=viewtopic&t=11176.0

Once in the pid editor while connected
Test the raw hex response from the vehicle
to see which modules respond.

You dont need to save the custom pid after
you learn which modules are responding.

Pedro123

Member
Posts: 14

Re: Preferred OBD Protocol?
on: March 6, 2019 (GMT)

“Create a custom pid using
mode/pid: 0100
header: Auto

There is a recent thread which describes
how to create custom pid…”

I’m at the PID creation for dummies stage.

What does “header” mean? What does “mode/pid:100” mean? What is “header: auto”?

If I can’t understand the reason and meaning of each PID character then I’m just going to mess things up. As well what would be a manufacturer specific PID – can I even find out?

What I’m looking for is engine oil temp and transmission oil temp on a 2017 Sonata 2.4L. Torque did this on the earlier models, but it’s not giving it for my year.

Capp777

Member
Posts: 2993

Re: Preferred OBD Protocol?
on: March 6, 2019 (GMT)

Header: Are the bytes in the protocol message
which set priority, source and destination for
the message. “Auto” means Torque will set
based upon message/mode type.

Mode/Pid: Is command sent to vehicle to perform
an ECU programmed action. Mode 01xx returns
specific OBDII data per standard.

Notes:

The leading 0 in 0100 is required. Do not
deviate from what I typed. Sending incorrect
values could trigger unwanted actions!

Good place to help with your understanding…

ht tps://en.m.wikipedia.org/wiki/OBD-II_PIDs

For a more exhaustive understanding… you
might look into buying the governing SAE/ISO
standards for your vehicle.

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