Can't connect to PCM
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I am trying to upload my new tune with Winflash and am having trouble connecting to the PCM.
I have an ALDL cable for 95 cars (which I have used before with no problems on a different laptop) and a RS-232 to USB adaptor.
I figured out which COMM port I needed to plug into and set it correctly in winflash, but when I try to read or write to the PCM it gives an error saying "Invalid response from PCM".
I tried connecting with datamaster to see if that would work, but it gives an error saying "ALDL is working correctly but unknown data was detected, you may have the wrong version". But I am using the correct DM35xEE for 94-95 LT1 F-bodys.
Anyone have any idea what the issue might be? All the pins at the OBD connector look good, my battery voltage is right at 12.2.
I have an ALDL cable for 95 cars (which I have used before with no problems on a different laptop) and a RS-232 to USB adaptor.
I figured out which COMM port I needed to plug into and set it correctly in winflash, but when I try to read or write to the PCM it gives an error saying "Invalid response from PCM".
I tried connecting with datamaster to see if that would work, but it gives an error saying "ALDL is working correctly but unknown data was detected, you may have the wrong version". But I am using the correct DM35xEE for 94-95 LT1 F-bodys.
Anyone have any idea what the issue might be? All the pins at the OBD connector look good, my battery voltage is right at 12.2.