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

No comments:

Post a Comment