Anyone worked with the 16196397 yet?

[RobertISaar]

with the P66 V6 ADX loaded, correct COM port selected, there should be communications. if you had a clone chip instead of a legit FT232R(they're showing up in the strangest of places), then you would need to run an older driver package and they seem to work happily.

don't suppose you have any status lights to tell you if it is sending/receiving data?

[Xnke]

I bought directly from FTDI, it's not a clone. I have the P66 ADX loaded, the cable passes the test when not hooked up. once hooked up, it fails the test. it will not connect to the ECU, I choose connect and it will say "connecting..." but it never connects.

All the wires marked "ground" in the file you gave me above are grounded, the Battery and Ignition wires have 12.6VDC to them, and the TX and RX wires are joined together to Serial Data. The ground from the USB cable is grounded to the rest of the ECM grounds. I rolled back to the older FTDI driver as detailed elsewhere on this site. Nothing has allowed it to connect to any of the four ECM's I've got here...two 4373 and two 6397, none of them talk. I have one each 4373 and 6397 that were pulled from running vehicles that I drove before pulling the ECM, so I know they're good.

[RobertISaar]

hmm..... everything sounds correct. the cable passing when PCM unconnected and failing when PCM connected is normal.

I don't believe there is any kind of "reasonable signal" requirement just for communications, though I've never run this particular PCM without most of the sensors connected.... maybe i'll throw together a quick harness and see if I experience the same.

[Xnke]

I have the following hooked up and nothing else:

A1 Sensor Ground (Black) To Ground
A17 Sensor Ground (Black) To Ground

B14 Battery Input (Orange) To +12.6V
B15 Battery Input (Orange) To +12.6V

B16 ECM Ground (Black/White) To Ground
B32 ECM Ground (Black/White) To Ground

B19 Serial Data (Tan) To TX/RX on the USB-5V TTL serial cable

C1 System Ground (Tan/White) To Ground
C17 System Ground (Tan/White) To Ground

C3 Ignition Feed (Pink) To +12.6v

That's all the wires I have connected, nothing else. I do have the oscilloscope watching the serial data line and I can watch the same data packet being sent over and over again, with no response from the ECM.

[RobertISaar]

with just the 7 power/ground connections shown here connected to a 12.3 volt source, I'm showing a draw of 340mA. I need to find one of my bare UART-USB boards to get ALDL comms tested....

[RobertISaar]

missed the part about the scope. the data being sent is for the DIC used on 94-95 grand prixs... it's sent out either 4 or 8 times a second(can't remember, it should be in the ALDL scheduler table though), so the PCM is attempting to communicate... that should rule out hardware problems, now it comes down to the USB adapter/software.

[Xnke]

Technically I should be able to fire up a terminal emulator and listen in on that data, yes?