Conditions for Setting the DTC
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
B1544
An improper voltage level is detected on the mirror motor common control circuit.
B1600
An improper voltage level is detected on the mirror motor vertical control circuit.
B1605
An improper voltage level is detected on the mirror motor horizontal control circuit.