Saturday, August 3, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 686


Circuit/System Description



The body control module (BCM) monitors the window UP/DOWN command from the driver door switch (DDS). 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 0.5 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.

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