B3820
DTC B3819, B3820, B3822, or B3823
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC B3819 00
-
Left Rear Window Up Control Circuit
DTC B3820 00
-
Left Rear Window Down Control Circuit
DTC B3822 00
-
Right Rear Window Up Control Circuit
DTC B3823 00
-
Right Rear Window Down Control Circuit
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) monitors the window UP/DOWN request from the driver door lock/window switch. 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 monitors the voltage difference between the B+ voltage and the voltage in the up and down signal circuits, if no function is being commanded, the signal voltage equal to the B+ voltage. If the UP or DOWN function is commanded, the BCM signal voltage drops approximately 0.5 volts in the appropriate signal circuit and the rear window switch will then command the window in the UP or DOWN direction.
Conditions for Running the DTC
Ignition is ON.
Conditions for Setting the DTC
B3819 00
The BCM detects a short to ground in the left rear window up signal circuit.
B3820 00
The BCM detects a short to ground in the left rear window down signal circuit.
B3822 00
The BCM detects a short to ground in the right rear window up signal circuit.
B3823 00
The BCM detects a short to ground in the right rear window down signal circuit.
Action Taken When the DTC Sets
The left or right rear power window normal operation from local rear window switch but will be inoperative from the driver door lock/window switch.
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.
Reference Information
Schematic Reference
Moveable Window Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views A/C Compressor Clutch
Description and Operation
Power Windows Description and Operation Power Windows
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command the appropriate rear door window UP and DOWN by using the window switch on the driver door lock/window switch. The rear door window should perform UP and DOWN function.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
2. Ignition ON, test for greater than 9 V between the signal circuit terminal C and ground.
• If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
3. Test for greater than 9 V between the signal circuit terminal B and ground.
• If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
4. If all circuits test normal, replace the rear window switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Rear Side Door Window Switch Replacement (Sedan and Wagon) Rear Side Door Window Switch Replacement (Sedan and Wagon)
* Control Module References Control Module References for BCM replacement, setup, and programming