XC90 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)

Tighten, see: See: Automatic Transmission/Transaxle/Specifications/Mechanical Specifications/Tightening Torque
Connect the connectors for the control module and the oil pump.
Top up and check the oil level in the active on demand coupling (AOC). See: See: Differential Assembly/Service and Repair/Final Drive, Replacing
Erase any diagnostic trouble codes (DTCs).