Clarification....Engine Running??

[DayvG]

Ignition on, engine off. Power supply connected.

That’s it

2. I’ve run into a situation where when I do “READ ECU” with engine off, I don’t get a full return of all of them in the SVT pane? What causes that?

Some ECU’s are terminal 15 ECU’s therefore if the ignition goes off then some ECU’s won’t be visible. KAFAS2 for example is a terminal 15 ECU.

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Ignition on, engine off. Power supply connected.

That’s it

1. How about if you don’t have a power supply (CTEK, etc...)?
2. I’ve run into a situation where when I do “READ ECU” with engine off, I don’t get a full return of all of them in the SVT pane? What causes that?

NEVER i repeat NEVER do anything with the ignition on! ok you can do tire pressure while driving

Do you mean engine running? Surely the ignition has to be on?