1G Data logging

[Pat026]

Just purchased a pc data logger premade since im not great at soldering. Uhm which wires connect to where on my obd1 port?

 

[lasershark]

Are you going to be emulating the palm mmcd software? For the Palm we use pin 1, 10, and 12.
which program are you trying to use?

 

[Pat026]

Im trying to run it straight to a laptop

I dont want to use the palm i belive this logger goes straight to pc but not 100%

 

[dgdsm]

It looks to me like you might still have to get a hold of an OBDI connector and do some wire splicing by color codes. This thread should be helpful:
http://www.dsmtuners.com/threads/need-the-wiring-of-obd1-plug.348904/

I'm not sure what laptop software will read/translate these signals so you might want to check into that also.

 

[Pat026]

Thank you! Im not 100% how it works yet but i opened it up looks pretty basic theres what looks to be a chip in the center of the board just tryina figure out all of this. Very complicated

 

[lasershark]

I dont want to use the palm i believe this logger goes straight to pc but not 100%

You can emulate the palm program via a laptop and run the free mmcd software. Either way you are still going to need a program of some sort to data log. The laptop isn't going to be able to magically read and log just because you have it "plugged in".

If you don't know what program you are going to be running then look into the mmcd software which is free and then find a free palm emulator. You will be running the palm program just from your pc which will be much easier to see and read...

Do you have a link you can post from where you got this adapter unit from?

 

[Pat026]

See

Palm os 3.5 and higher right?

Sorry im really new to all this

 

[lasershark]

It's all good. To be honest I have no idea what you have but I am not an electronics or computer expert either. If you can post a link to where you bought this from it might help decipher what it is you actually have and or what you need...
I built my own logger cable for my 1g back in the day and it was very primitive looking and simple.
There might be a program you are supposed to specifically use with that contraption ...

The one for the palm is simple and looks like this http://www.dsmtuners.com/threads/how-to-set-up-mmcd-make-a-logging-cable.203316/

Again, try to find a link for us; it would help.

 

[Pat026]

I purchased off ebay im not great at soldering. I dont want to mess with the ECU. I hear there easy to burn out and i couldnt find any cheap palms so i purchased this just dont know how it works :/

Im currently piggybacking with an safc 2 just till i have the funds to use the dsmlink just trying to see where my cars at

 

[lasershark]

You might want to contact the seller and see if he can be any help. I tried to help but sorry, I am at a loss...

 

[Pat026]

http://fascinationsoftware.com/FS/html/DSM_DataCable.html

did some searching and this is where the device started.

opened it up and it has the exact same components

 

[lasershark]

So Green=1 White=10 and black=12 the red wire would be a power wire if external power is not provided.
Honestly I built my cable for like 10 bucks and bought a old school palm on ebay for 2 for $10 so I was data logging at $20.

I think that cable will work with a palm pilot using the db9 connector and the red wire to a power source would keep the palm charged up.

@steve would know more than anybody so lets see what he says.

 

[Pat026]

Ok, but heres the problem there is no white wire its yellow it looks likethe same design though. In my earlier picture you can see thes similarity. The last thing,i want is to hook the wrong wire up and mess somthing up i got the palm emulator and mmcd installed on my pc currently

Can i use a standard db9 to usb to run this off the laptop? Or is there a special cable?

 

[Pat026]

I just ordered the palm m105 comes with the hotsync cable im probably going to hook everything up saturday just trying to be clear red is power green is data black is ground whats the yellow?

 

[steve]

Without seeing the bottom side of that board I can't retrace out the schematic and can't know where the connector wires go. I can tell that's what we would call an active or powered ODB1 interface that should have +12v, Ground, Data, and Mode on the wires but I can's say which color wire is which.

If I had built it the colors would be (Best Guess):

Red - +12v
Black - Ground (ODB pin 12)
Yellow - Data (ODB pin 1)
Green - Mode (ODB pin 10)

 

[Pat026]

Ok heres all sides


How would this, Interface work?

 

[steve]

I'm not sure what your asking?
The interface converts from the 1G ECU format to RS-232 for a computer to read.

There are two main questions I'm trying to answer from reverse engineering your device.

1. Which wires on the 4 pin connector are which. As I said before they are going to be +12v, Ground, Data, and Mode.
2. The same for the DB-9 connector. There are two flavors of RS-232 interfaces, DCE and DTE. They talk between the two types with a normal cable and between the same types using a cross over cable. DCE = Modem, DTE = Terminal.

Still working on the caffeine level so I can follow the rat's nest.

 

[Pat026]

I know i just dont know which wires are what. I just picked it up. Is there a way of telling?

 

[steve]

So far I'm pretty sure that the four wires are as I guessed.
Is the DB9 connector male or female? It's hard to see it's connections in the circuit.

 

[Mikey851]

Here is a pinout that says "Engine" and "Diagnosis Control" for pins 1 and 10. That sounds like data and mode to me.

http://pinoutguide.com/visual/gen/mitsubishi_old_12pin.jpg

 

[steve]

Correct, that's the Mitsubishi ODB1 connector.

The first nine pins are all flavors of data from different computers or sensors. The one I refer to in this context as Data is the diagnostic data signal from the Engine Computer. It's a 0-12v simplex serial stream at 1920 bps of a one byte command/response format.

When the "Mode" pin is high the ECU outputs a 0-12v heartbeat or set of fault codes and when the "Mode" pin is grounded the ECU is in datalogging/diagnostic mode using the request/response protocol. You send a request and the ECU returns a value.

Here's some old posts about the 1G DLC.

http://www.dsmtuners.com/threads/where-do-i-plugin-ecmlink.437986/#post-152997832

http://www.dsmtuners.com/threads/diagnosis-pin-on-ecu.259160/#post-151177542

http://www.dsmtuners.com/threads/on...ishi-ecu-using-arduino.464711/#post-153277289

http://www.dsmtuners.com/threads/palm-iiic-datalogger.239223/#post-151001994

Good reference on a passive DLC Cable and MMCD on Palm

http://www.dsmtuners.com/threads/how-to-set-up-mmcd-make-a-logging-cable.203316/

 

[Pat026]

It is female i also have a standard usb to db9 not sure if it will work though.

 

[Mikey851]

Correct, that's the Mitsubishi ODB1 connector. The first nine pins are all flavors of data from different computers or sensors. The one I refer to in this context as Data is the diagnostic data signal from the Engine Computer. It's a 0-12v simplex serial stream at 1920 bps of a one byte command/response format. When the "Mode" pin is high the ECU outputs a 0-12v heartbeat or set of fault codes and when the "Mode" pin is grounded the ECU is in datalogging/diagnostic mode using the request/response protocol. You send a request and the ECU returns a value.

Here's some old posts about the 1G DLC.

http://www.dsmtuners.com/threads/where-do-i-plugin-ecmlink.437986/#post-152997832
http://www.dsmtuners.com/threads/diagnosis-pin-on-ecu.259160/#post-151177542
http://www.dsmtuners.com/threads/on...ishi-ecu-using-arduino.464711/#post-153277289
http://www.dsmtuners.com/threads/palm-iiic-datalogger.239223/#post-151001994

good reference on a passive DLC Cable and MMCD on Palm

http://www.dsmtuners.com/threads/how-to-set-up-mmcd-make-a-logging-cable.203316/

That's exactly how I read it as well...that those are different data types and that the other pin initiates the diagnostic mode. I am pretty new here too, so just getting my head wrapped around all of this. I am on Link though, so it's different for me....still handy to understand.

 

[Pat026]

I understand the concept of how it works. I probably should've just built my own cable, but i bought this had my friend soldier on mini spade connectors. theres a data mode and power and ground i just dont want to cross the wires and mess something up.

Im going to try your way red and black are usually always power and ground just worried about the green and yellow. What happens if i mix them up?

And tmo should work with this interface right?