Serial connect on bench test of new Microsquirt issues

[nzmikec]

Hi all,

Im having issues connecting to a new microsquirt v3. Unit has never been fitted, I'm supplying power, ground and serial pins (TX,RX,GND) only.
I don't seem to be able to connect tunerstudio or any other serial connection.
Using the terminal in tuernerstudio I have confirmed my serial port is working as when the TX and RX pins are jumped together it acts as a loopback. When these pins are reconnected I get nothing from the MS when sending 'S' or using detect in the new project dialog.

I have followed the troubleshooting on this page without joy. http://www.useasydocs.com/details/connect.htm

Is there any way of testing if the unit has booted without connecting all inputs / outputs? if a LED is connected to the warm up led it flashes when power is applied to the MS, is this normal behaviour? I also get 5v on the Vref. Is my unit dead?

Any help would be most appreciated. Kind Regards, Mike.

[nzmikec]

Further to this, I have been able to connect to the Microsquirt using the 5v serial connections on the board as detailed on this page http://forums.turbobricks.com/showthread.php?t=323337 using a 3.3 - 5v FTDI cable. This leads me to believe that the TTL - RS232 chip on the board is faulty or damaged. Is this a common occurrence? Does anyone know which chip this is so I can test it is receiving power? Should I be contacting my vendor for a return?

Cheers,
Mike.

[Matt Cramer]

Failed RS232 chips are pretty rare on current production MicroSquirts, but not unheard of. I'd contact the vendor directly for warranty support.

[nzmikec]

Thanks Mat.

Regards, MikeC

[MiikeSnow]

What Serial to USB adapter are you using? The 10$ TRENDnet one on amazon is by far the best I have found. Have you tried the port check that is on the diy site? https://www.diyautotune.com/support/downloads/ under Other MegaSquirt Related Software? I had issues with a few different cables when connecting to my MS2 I finally ordered the TRENDnet adapter and it worked instantly. Also, Did you adjust the baud rate to 115200 on your port?