XC90 AWD L6-2.9L Turbo VIN 91 B6294T (2004)
the control module disconnected
Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
Connect an ohmmeter between terminal #16 on the breakout box and the battery negative terminal.
To connect the breakout box, see Connecting the breakout box See: Pinout Values and Diagnostic Parameters/Connecting the Breakout Box.