Has anyone on here use a Arudino as a USB to TTL converter to read the data stream from the pcm on a 1995 F-Body pcm? I have connected the following:
1. Reset to Gnd on an Arudino UNO to put in TTL mode
2. connected the TX and RX pins to Pin 9 (Serial Data) on the ALDL connector
3. Connnected the GND on the ARudino to Pin 5 (GND) on the ALDL connector

I have not been able to establish any connection; however, I did see the TX/RX lights on the Arudino flashing like there was some communication.

Any help would be greatly appreciated.