2010 Cadillac CTS Sedan AWD V6-3.6L Page 613
Circuit/System Description
The body control module (BCM) monitors the window UP/DOWN command from the driver door module (DDM). When the rear window UP or
DOWN command is received, the BCM sends a signal to the appropriate rear window switch. The rear window switches continuously monitor the
up and down signal circuits, if no function is being commanded, the signal voltage is at approximately B+ voltage. If the UP or DOWN function is
commanded, the BCM signal voltage drops approximately 5 volts and the appropriate rear window switch will then command the window in the
UP or DOWN direction.
Conditions for Running the DTC
Battery voltage is between 9-16 volts.
Conditions for Setting the DTC
B3819 00
The BCM detects a fault in the left rear window up circuit.
B3820 00
The BCM detects a fault in the left rear window down circuit.
B3822 00
The BCM detects a fault in the right rear window up circuit.
B3823 00
The BCM detects a fault in the right rear window down circuit.
Action Taken When the DTC Sets
The left or right rear power window will be inoperative from the driver master control.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.
