Re: Harness for Bench Tuning
For the LS1 PCM you only need the blue plug, the pins are:
1 GND
19 IGN (+12V)
20 +12V
40 GND
57 +12V
58 VPW serial
You also need a 12V battery or a 1.5A regulated power supply.
Chris...
Re: Harness for Bench Tuning
Thanks for the reply Chris...
Looks like I have the correct connections. I did ground pins 1 and 40 on the Blue connector. It showed it in my Mitchell on Demand diagrams.
I guess that not having the VAT disabled is causing the problem. My HP Tuner suite will arrive in the next day or two and then the Fun Begins...
Thanks Again,
Dave
Re: Harness for Bench Tuning
VATS shouldn't affect it. I can connect and scan LS1, V6, 4cyl, LS2, PCMs, ECM's, TCM's on my bench fine.
Chris...
Re: Harness for Bench Tuning
How right you are........I went over my wiring several times. The DLC is mounted on a bracket so I really could not see the top pin numbers, but I continued to validate a wrong connection. Today I took it apart to add a connection to pins 8 and 12. In doing so, I found the data pin 2 was actually in pin 7. A quick fix. All is well now..I am CONNECTED !!
Regards,
Dave