Built a datalogger cable, doesn't work. Why???

[5150DSM]

Just like the title says. I built a datalogger cable and it doesn't work. I've reviewed everything I can find on this site, Talk and Google, etc... I built it according to spec, checked all my connections and so on. Here's some pics, did I build it wrong?

 

[MY1GDSM]

What all other parts are you using? What programs? for some reason if IIRC the picture in most the write ups actually is for a PC cable. might be wrong there though as I don't know what you used to fallow to build it.

IMHO I wouldn't use any serial logging cable or palm... . they're getting so dated and are just more hasal then it's worth. syncing then converting files to CVS ect. Nevermind if you don't have a SD in the palm and lose everything.

Have you seen this? http://www.dsmtuners.com/forums/articles-electrical-wiring/424006-easy-way-make-1g-usb-datalogging-cable.html As he said you can use it with a number of programs.

I actually did a quick right up on how to log with TunerPro RT See Here --> http://www.dsmtuners.com/forums/articles-tuning-ecu/429444-how-log-your-1g-tuner-pro-rt.html I used a V3 Ecmlink cable but you can use the cable above or what your building as well with a
USB to serial adapetr that has a FTDI chip set and you download the proper drivers.

But,
A USB to RS232 Serial Converter with a FTDI chip like in the link above mine set is cheaper to build then a decent Usb to serial converter like a the keyspan one you needed with V2.5 Dsmlink.

Saves a lot of time to jsut log with a cheap small PC. No worries about losing your logs syncing things and it WAY easier to share logs with other programs then say MMCD on a plam you can use a Palm Emulator as well so you can still use MMCD with out the hassle and still easily share logs still if wanted.

 

[5150DSM]

This is for a Palm. Palm V to be exact, using MMCD. I agree with everything you said about Palm based datalogging; however, I just dropped $3500.00 into my motor, trans, etc... So, I'm tapped out at the moment. I planned on doing Link in a few months but I need to dial in the car in the mean-time. Thanks a lot for the links, maybe I can pull something together with the USB cable and my old laptop.

Back to my original question... Do you or anyone else see anything wrong with how I built the cable for the serial connection?

 

[bryanwheat]

I will take the cover off of mine and look. It looks about right though.

 

[rts91tsi]

It looks like you have the diode connected to pin 1, when it should be connected to pin 2.

The ground also appears to be connected to the wrong pin, number 4 from your pic, and it should be tied to pin 5.

http://www.dsmtuners.com/forums/articles-tuning-ecu/203316-how-set-up-mmcd-make-logging-cable.html

Although it is kinda hard to say exactly how the ground and diode are pinned to the db9 connector from the angle of your picture. Here is a db9 pin number reference if you need it to troubleshoot your cable connections.

 

[5150DSM]

It looks like you have the diode connected to pin 1, when it should be connected to pin 2.

The ground also appears to be connected to the wrong pin, number 4 from your pic, and it should be tied to pin 5.

http://www.dsmtuners.com/forums/articles-tuning-ecu/203316-how-set-up-mmcd-make-logging-cable.html

Although it is kinda hard to say exactly how the ground and diode are pinned to the db9 connector from the angle of your picture. Here is a db9 pin number reference if you need it to troubleshoot your cable connections.

You were absolutely correct. Switched the pins and everything worked perfect. I feel like a complete dumbass. Thank you very much for looking closely and spotting my fu(k-up. Rep points for you sir.

I'll mark this as resolved and hopefully will save some other people from the headaches.