Problem w/ class2 comm during BBL

[FeetDry]

More than half of the time when I try BBLing, my dash takes as long as a couple minutes to come to life. RPM & speedo work, but the gear selector remains dark (off), and many of the smaller gauges will be dead. I typically see the fuel gauge on empty. Most times I get a U1016 DTC.

Does anyone else see this? (Is this typical?)

OS=16265175 2000 Vortec 4.3L

[Blacky]

Do you mean your real in-car dashboard or the EFILive dashboard on the PC/laptop screen?
Regards
Paul

[FeetDry]

Do you mean your real in-car dashboard or the EFILive dashboard on the PC/laptop screen?
Regards
Paul


I'm speaking about the GM dashboard. (Not the EFI dashboard.)

[joecar]

U1016 is loss of comms with PCM from perspective of one of the other modules.

[Blacky]

Is it only while using FlashScan for BB logging? Or is it whenever FlashScan is plugged in to the vehicle?
Are you using a FlashScan V1 or V2?

Regards
Paul

[FeetDry]

I don't recall seeing this while running w/ the PC connected to my V2. I just tried it again (w/ PC running Scan 7.5), and I could NOT get it to do it. (Is that what you were asking?)
I then tried it w/o the PC, (BBL) and it showed up on the first try. I don't always see it, but most times I am looking at the V2. I only notice it when I'm driving. Watching the GM dash, it "blanked" out 3 times w/ in the first minute of engine start-up. "blanked" means the gear sel is black, the ECT & Fuel gauge are zero'd. The oil press, RPM, and volt gauge are still working OK. The DTC set again.

So I have to say the problem only shows when doing BBL.

[joecar]

So it only happens with V2 in BBL standalone mode (PC not connected).

Which vehcile/year/model is this happening on...?

[FeetDry]

So it only happens with V2 in BBL standalone mode (PC not connected).
yes
Sonoma, 2000 4.3L Vortec OS=16265175

[ScarabEpic22]

Post your Options.txt, sounds like a weird PID causing havoc whenever its being recorded.

[FeetDry]

Options file attatched.