CRC-1000 Dakota Digital DBW Cruise and a GMPP LT4

[stan65]

All,

I'm trying to get my cruise to work and I have a strange anomaly.

The cruise only functions when I have my HP-Tuners MPVI2 plugged in. I do not have to have the laptop USB hooked up, just the MPVI2 dongle.

It took me a bit to figure out why it worked sometimes and not others.

If I start the car without the dongle and go for a drive, the cruise will not engage. The light on the CRC-1000 goes green when powered on and turns amber for a second and back to green when I attempt to engage. (Dakota tech support says something is not allowing it to engage, and I would have to agree with them) lol.

If I start the car with the dongle and go for a drive, the cruise will not engage. and function perfectly. The light on the CRC-1000 goes green when powered on and when engaged turns amber and stays amber until I hit the brake or clutch at which time it goes back to green. If I unplug the dongle while driving, it will immediately shut the cruise off.

Any suggestions or explanations?

I tried adding a 60ohm terminating resistor across pins 6 and 14 at the ALDL with no success.

Thanks,
Stan