DTC U1104: SAS Can Timeout/Not Equipped: Notes
WARNING: This page is about a different car, the 2009 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
If DTC U1104 is set in the TCL/ASC-ECU, always diagnose the CAN bus lines.
CAUTION:
Whenever the ECU is replaced, ensure that the CAN bus lines are normal.