jesusg9

Hi all,

Long time lurking this forum, fortunately without needn't help.
Now automatic transmission seems to have a weird behaviour. I would like to track it with Torque APP. For so the current gear OBD2 pid is needed, if W164 OBD2 do have it
Could be any of you be so kind to tell us which is, if there were, the current gear OBD2 pid for w164 ?

thanks in advance.

Maj. Dundee

Have no idea what you are referring to.

jesusg9

Thanks for your interest Mj. Dundee

First I have to say that I'm just a DIY'er with a very few idea of things, so I could be wrong with my request.

As far as I know, OBD2 scanners, propietary or open ones, read the car info like errors codes, temperatures, speed, rmps, sensor status, etc... sending a code, that is an unique identifier, for each parameter to the control unit of the car.
Googleing OBD2 PID one can find standards PIDs.

My belive is that Current Gear PID in M-class (w164) it's not the standard one "22199a".
If this PID exists, I could porgram it in torque app and then track the automatic transmision issues. if not, then B-plan is calculate current gear using speed and rpms, not easy.

does any guru know this pid ?, if so,,,,,,, would be so kind to share it ?

Thanks for your reading and patience.

Maj. Dundee

I have no idea.

Essell55mb

Probably way too late ! But I did come across possibly what you need ( if supported by your model car )

Is PID, Service 01, Hex A4 - Transmission actual gear.

https://en.wikipedia.org/wiki/OBD-II_PIDs

If its not in the standard PID list, this may also be of interest,

https://github.com/mkovero/7226ctrl/issues/15

lkchris

So then, PID means parameter id.

jesusg9

Thanks,
I had forgotten to thank. sorry.
Anyway Torque APP seems that can't read it.

alive19

Try this:
Header: 7E1
PID: 2130
Equation (in torque): lookup(bit(F:0)+bit(F:1)*2+bit(F:2)*3+bit(F:3)*8:b it(F:0)+bit(F:1)*2+bit(F:2)*3+bit(F:3)*8:0='N':11= 'P':13='R')

jesusg9

Thanks for your interest.
Since your post i've being concerned about couple of things.
First is to ensure that this command only reads data and do not set o write data.
The other is related with the math of the command lookup ........ bit(F:2)*3 .......... ? 3 ?, not 4 ? As in a typical binary codification.

alive19

Yeah good point. Unfortunately I transcribed the equation, rather than copied it (different devices). I'll check again, but yes it probably should be 4 rather than 3.

It is very hard to write any data with OBD2 commands. These send a request for data. You need to access the CAN bus to be able to send commands (write data).

I've been using it in torque and it works fine to give current gear.

I'm still looking for the oil temperature though.

jesusg9

Hi,
This command seems to me to work like this
lookup(Which is the source of the info for this ? Header: 7E1 PID: 2130

Thanks

alive19

Basically the Chrysler extended PIDs have transmission temp (jeep 2012 and later) that gives the transmission temp.

I just viewed the raw data from this PID and watched as I changed gear. Looked for some patterns.

The header and PID are just copied from the Chrysler PID.