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Long Term Diagnostic Sessions - Battery Charger or Power Supply?
I wish to do some diagnostics that take a long time (exhaustive scan for Mode 22 PIDS from 0000 to FFFF for each of 8 Modules for example).
My car typically only lives for 2 or so hours on battery with the ignition on.
With a 2Amp or 6Amp trickle charger connected, the car still discharges the battery in a session.
So my question is, I now have a 13.8V regulated Power Supply that can provide up to 23 Amps continuous.
Should I be able to connect this directly to the Battery Terminals while I'm doing the diagnostic session?
Or is something else required - such as connecting the negative terminal to chassis GND like you do when jump starting, or disconnecting the battery completely and just run from the power supply?
Any advice or links to resources welcome.
Lukeyson
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