Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
B1544
An improper voltage level is detected on the driver/passenger mirror motor common control circuit while the mirror is being commanded.
B1600
An improper voltage level is detected on the driver/passenger mirror motor vertical control circuit while the mirror is being commanded.
B1605
An improper voltage level is detected on the driver/passenger mirror motor horizontal control circuit while the mirror is being commanded.