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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1393 (Door System, Mirror System & Window System) >> Diagnostic Information and Procedures >> DTC B3821 >> Conditions for Clearing the DTC

Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault free ignition cycles.

DTC B3821

Step Action Yes No
Schematic Reference:  Power Window Schematics  
Connector End View Reference:  Power Door Systems Connector End Views   or Body Control System Connector End Views  in Body Control System
1 Did you perform the Door Systems Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Door Systems 
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Disable the window lockout function.
  4. With a scan tool, command the left rear power window UP and DOWN.
Does the left rear power window operate UP and DOWN with each command?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the left rear power window switch.
  3. Turn ON the ignition, with the engine OFF.
  4. Ensure the window lockout function is disabled.
  5. Probe the window lockout signal circuit with a test lamp connected to a good ground.
Does the test lamp illuminate?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 4 
4 Test the window lockout signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 7  Go to Step 5 
5 Inspect for poor connections at the harness connector of the Body Control Module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 7  Go to Step 6 
6
IMPORTANT: Perform the set up procedure for the Body Control Module.
Replace the Body Control Module. Refer to Body Control Module Replacement in Body Control System.Did you complete the replacement?		 Go to Step 7  -
7
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
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