Conditions for Setting the DTC
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
B1956 54, B1957 54
The BCM will automatically attempt to download the calibration program into the window motor (as will occur when the window motor has been replaced). If the first calibration program fails to load, the BCM will attempt to download the calibration program a second time. If this download fails, the BCM will set appropriate DTC.
B1956 55, B1957 55
The BCM has detected that the window motor is not configured and the DTC can set for the following reasons:
- The battery has been disconnected
- The battery has been replaced
- The door wiring harness has been disconnected
- The window motor has been disconnected.
- Excessive and repeated Up and Down window switch use