MMCD logger cable DIAGRAM needed

[danyz250f]

I have made a post in the tuning section like a month ago and know one will help. So I try again. This is the cable I made and it did not work.

I need a diagram for this kind of db9 connector. Steve said something about from male to female the pins are labled different. This cable I made I was only able to get an ecu comm error. Rep points for the person who answers my question correctly.

http://www.dsmtuners.com/forums/showthread.php?t=236804

 

[DSMcamaro]

Congrats! I ripped my cable apart for you just to see what the inside was like. Took like a half hour to scrap off all the damn silicon...pics shortly.

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The red wire is the jumper.

 

[danyz250f]

So my logger will only say ecu comm error. Does that mean bad cable? Palm? ECU? I recently put in an eprom ecu and it worked but after a couple weeks the logger just quit working. I have a heart beat from the ecu. The car runs fine. After the motor swap now I have a check engine light. I have no idea what it is. I NEED A LOGGER. I will try my friends palm tonight. He has a 2g put I can use the palm. None of my friends have a 1g.

 

[danyz250f]

Is this pin used?

 

[DSMcamaro]

No, only pins 2, 3 and 5 are used. So your cable looks correct. Are you connecting the one wire to the upper left pin and the jumper wires to the bottom left pin and the pin 2 up from it? (to the diagnostic port)

 

[Defiant]

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

 

[danyz250f]

So why does that cable have to be so complicated? Is that the same one as the one on mmcd's site. I dont think I could follow his diagrams. I will try my friends palm and when that doesnt work I guess I will buy a working logger cable.

 

[fhudsonjr]

I have made a post in the tuning section like a month ago and know one will help. So I try again. This is the cable I made and it did not work.

I need a diagram for this kind of db9 connector. Steve said something about from male to female the pins are labled different. This cable I made I was only able to get an ecu comm error. Rep points for the person who answers my question correctly.

http://www.dsmtuners.com/forums/showthread.php?t=236804

Looking at your link that you have here, it appears you have the diode backwards. the black mark on the end of the diode needs to point away from the RS232 plug and towards the wires you connect to the car's plug.

Also the wire that goes to pin 5 doesn't look like it is soldered very well to the end of the resistor.

Your pictures are a bit blurry.

Is the second set of pictures a different plug and wires? They look different. It is hard to tell if you have the doide pointing in the correct direction.

The wire from pin2 of the RS232 plug goes to pin1 of the car plug. Pin5 of the RS232 goes to pin 10 and 12 of the car plug.

Let me know if this helps. Good luck.

Fred

 

[fhudsonjr]

I forgot to add that I put one together and used some parts from Radio Shack.

You can buy a small printed cicuit board and small plastic box that the board will fit in.

It takes a little bit of work modifying the box a bit so the wires can fit into the box,but it is so much neater and you don't have to worry about all that "stuff" at the RS232 plug shorting out.

Fred

 

[danyz250f]

thanks for your help I will try this and let you know.

 

[danyz250f]

No worky. I swapped the wires and swapped the way the diode was pointing. With the clearish end of the diode pointing tward the logger and either way the wires were hooked up on the plug the most I would get was ecu comm error. This worked with the setup like in the pics but with the wires switched on the plug ( black wires jumping, or the red wire jumping) Wierd I know. With the wires switched on the plug both ways I would get ecu comm error.

 

[DSMcamaro]

Maybe you should try a different cable or try your cable on a different car.

 

[danyz250f]

I have tried it in my GF's car and it did the same thing. The ebay cable I had before had a smaller size wise resistor. It worked for quite a while. Then out of the blue it stopped and that is why I tried making my own. I would try a new cable but I dont have one. Is there any settings on the palm that need to be set. Like the hotsync or the version of palm os. If so what version of palm Os is needed.

If I get a ecu comm error does that mean the cable is built right?

 

[speedy_talon28]

here is the diagram

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(click to enlarge)

 

[danyz250f]

So I cant get my logger to work so I use a volt meter and check codes. It does one short sweep and two long sweeps. This means code 12 right? MAF. I have a gm maf will it always throw that code or what. My check engine light used to be on but it is not any more fore some reason. I swaped the motor and does the ecu need to ajust to everything or what. Why would it throw a code 12?

 

[steve]

Nope the long codes are the tens and the short ones the units. So that would be a 21 ECT error.

Don't overlook this thread. http://www.dsmtuners.com/forums/showthread.php?t=203316

Steve

 

[danyz250f]

STEVE!


Ok in that thread it says he had to connect the jumper gound a couple times, why is that?

Also what code was that you mentioned. How do I fix the problem.

 

[steve]

Ok in that thread it says he had to connect the jumper gound a couple times, why is that?

Don't know. I'd guess he had a bad connection considering how he was doing it.

Also what code was that you mentioned. How do I fix the problem.

Engine Coolant Temp sensor. The same one that causes no starts. Usually broken wires to the sensor in the thermostat housing. Lots of posts here on it.

Steve

 

[danyz250f]

Yes, that would explain my over heating due to a loose hose clamp. The light is off now and temp is normal. Funny it still throws the code.

 

[fhudsonjr]

Nope the long codes are the tens and the short ones the units. So that would be a 21 ECT error.

Don't overlook this thread. http://www.dsmtuners.com/forums/showthread.php?t=203316

Steve

Dan, this is the link I used to make my cable.

Thanks,Steve.

Instead of putting all that "stuff" near the RS232 plug I soldered everything onto the printed cicuit board like the guy at fascinationsoftware did only I used the diagram that Steve linked to.

Mine works fine. I would start all over with new components. When resistors go bad they burn and open. Should be able to check that w/an ohm meter.

In fact you can check your diode also w/the ohm meter. Put the meter on say 100k. Check the resistance one way with your leads and then switch them the other way.

One way you will read 0 or close to 0 and the other way you will read some resistance. If it is the same both ways the diode is bad.

Good luck.

Fred

 

[danyz250f]

Thanks fred. I have made the cable a few times and still nothing. I had the ground and power wires switched. So I swapped them and still nothing. So I will try it in the girl friends car again and see if it works. I When it is a 10k resistor it means it is a 10,000 ohm resistor right? I am kinda thinking it might be in the car itself. I can get codes via volt meter and it is throwing 21.

I also took out my abs and the abs ecu box behind the passenger door. Could this do something?

Also I put an eprom chip in and had to do some rewirig on the plugs for the studder box feature. It worked after that but I think the logger was not working currently when I took the abs out.

If I can read codes via volt meter using the single power pin and the ground pin could this mean the diagnostic pin on the car plug has the problem? How do I check that.

Thanks for the help guys.

 

[steve]

Since you can read the code that means the data line is running from pin 1 on the ECU to pin 1 on the DLC. Pin 10 on the DLC goes to pin 2 on the ECU, or it should. Grounding it should activate the datalogging mode.

Steve

 

[danyz250f]

Guess what after making friends with the multi meter I found the problem. The effin plug on the bottom of the palm. Straight in it wont work. But bend it back and what do you know it works.

Hours of my time wasted, for such a stupid fix. Well i am stoked because I dropped a new motor in and now I can tune it!!!!!!!!!!!!!!!!!!!!

Thank you everyone for your help.