With BSI

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Remove the BSI control unit (see BSI CONTROL UNIT REMOVAL/INSTALLATION ).
Remove the SH-AWD control unit (A).

Fig 1: SH-AWD Control Unit, Connectors And Mounting Bolts With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the SH-AWD control unit connectors (B).
Install the SH-AWD control unit in the reverse order of removal.
If the SH-AWD control unit was replaced, it must be initialized (see SH-AWD® CONTROL UNIT INITIALIZATION ), otherwise the SH-AWD system will not function.