[b3lha]

Hi Nomake,

Glad the adapter arrived safely.

It does sound like a problem with your serial adapter. I had an email recently from an impreza owner who was having the same problems with a USB-serial converter.

When you turn on the ignition you may get a single zero or garbage byte as the interface powers up, but you should not be picking up an endless stream of zeros.

I have always been able to read the TCU using the 45 command, even on cars where I couldn't read the ECU.

There is no handshaking used in this circuit. If your serial interface requires RTS/CTS handshaking then you could try fooling it by connecting the RTS pin to the CTS pin.

Can you beg, borrow or steal a computer with a standard serial port?