2010 Cadillac CTS Sedan AWD V6-3.6L Page 409
DTC B1544 01
- Mirror Motors Common Circuit Short to Battery
DTC B1544 02
- Mirror Motors Common Circuit Short to Ground
DTC B1544 04
- Mirror Motors Common Circuit Open
DTC B1600 01
- Mirror Motor Vertical Circuit Short to Battery
DTC B1600 02
- Mirror Motor Vertical Circuit Short to Ground
DTC B1600 04
- Mirror Motor Vertical Circuit Open
DTC B1605 01
- Mirror Motor Horizontal Circuit Short to Battery
DTC B1605 02
- Mirror Motor Horizontal Circuit Short to Ground
DTC B1605 04
- Mirror Motor Horizontal Circuit Open
Diagnostic Fault Information
Circuit/System Description
The Driver Door Switch (DDM) or Passenger Door Switch (PDM) controls the mirror horizontal and vertical motors through the use of
bi-directional motor controls. When the mirror is commanded up and down, voltage or ground is supplied to the mirror vertical motor through the
mirror motor up/down control circuit and voltage or ground is supplied through the mirror motor common control circuit.
Horizontal controls operate in the same manner with the mirror motor left/right control circuit supplying voltage or ground and the mirror motor
common control circuit suppling voltage or ground to the mirror horizontal motor when the mirror is commanded right and left.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
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.
Action Taken When the DTC Sets
Mirror movement is suspended as long as the fault is present.
