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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1086 (Door System, Mirror System & Window System) >> Diagnostic Information and Procedures >> DTC B3272: Door Unlock Switch Circuit >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  Determines whether the DTC is current or intermittent.
  2. 3:  Determines whether the driver door lock switch lock signal circuit or a door lock switch is shorted to ground.
DTC B3272

Step Action Yes No
Schematic Reference: Door Lock/Indicator Schematics 
Connector End View Reference: Power Door Systems Connector End Views , Body Control System Connector End Views , or Electrical Center Identification Views
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. With a scan tool, observe the door unlock switch parameter in the Body Control Module data list.
Does the scan tool display Inactive?		 Go to Diagnostic Aids Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Disconnect the driver and front passenger door lock switches.
  3. Turn ON the ignition, with the engine off.
  4. With a scan tool, observe the door unlock switch parameter in the Body Control Module data list.
Does the scan tool display Inactive?		 Go to Step 4  Go to Step 5 
4
  1. Turn OFF the ignition.
  2. Connect the driver door lock switch.
  3. Turn ON the ignition, with the engine off.
  4. With a scan tool, observe the door unlock switch parameter in the Body Control Module data list.
Does the scan tool display Inactive?		 Go to Step 7  Go to Step 8 
5 Test the driver door lock switch lock 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 10  Go to Step 6 
6 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 10  Go to Step 9 
7 Replace the driver door lock switch. Refer to Power Door Lock Switch Replacement (Aztek)  or Power Door Lock Switch Replacement (Rendezvous) .
Did you complete the replacement?		 Go to Step 10  -
8 Replace the front passenger door lock switch. Refer to Power Door Lock Switch Replacement (Aztek)  or Power Door Lock Switch Replacement (Rendezvous) .
Did you complete the replacement?		 Go to Step 10  -
9
  1. Perform the set up procedure for the body control module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
  2. Replace the body control module. Refer to Body Control Module Replacement in Body Control System.
Did you complete the replacement?		 Go to Step 10  -
10
  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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