Thursday, April 11, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 688


DTC Descriptors



DTC B3821 00



- Left Rear Window Relay Power Circuit



DTC B3824 00



- Right Rear Window Relay Power Circuit



Diagnostic Fault Information



Circuit/System Description



The body control module (BCM) monitors the window lockout command from the driver door switch (DDS). When the rear window switch



operation is authorized, the the BCM signal voltage drops approximately 5 volts to the rear window switches allowing for normal window operation



from the rear switches. If the rear window lockout function is commanded, the BCM signal voltage is at B+ voltage which disables the rear window



switches and the rear windows will only operate when the BCM receives a command from the driver master control.



Conditions for Running the DTC



* Battery voltage is between 9-16 volts.



* The ignition is ON.



Conditions for Setting the DTC



B3821 00



The BCM detects a fault in the left rear window lockout circuit.



B3824 00



The BCM detects a fault in the right rear window lockout circuit.



Action Taken When the DTC Sets



The left or right rear power window will be inoperative.



Conditions for Clearing the DTC

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