GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Park Avenue 🢒 DTC 🢒 DTC B2201 LF Window Switch Stuck in Down Position

Schematic

Refer to Power Window Schematics

Front Power Window Components


Object Number: 626571 Size: FS
Power Door Systems Components
Power Windows Operation
Rear Power Window Components
Courtesy Lamp Switch, LH Door Courtesy Lamps, and IP Compartment Lamp
Auxiliary Lighting Control, RH Door Courtesy Lamps, and Rear Compartment LAmp
 .

Circuit Description

The simple bus interface provides a communications path from the LH front power window switch to the driver door module (DDM). The DDM contains the following two types of software:

    • Switch message decoding software
    • Simple bus interface diagnostic software

The software enables the DDM to monitor the state of the LH front power window switch.

Conditions for Setting the DTC

DTC B2201 sets any time the driver door power window switch is continuously closed in the DOWN position for a period greater than 15 seconds.

DTCs B1982 (Battery Voltage High) and B1983 (Battery Voltage Low) must not be current or the diagnostic will not run.

Action Taken When the DTC Sets

The switch command will be ignored until it again changes state.

Conditions for Clearing the DTC
    • This DTC will set from current to history when the window up input cycles off.
    • The history DTC will clear after 50 ignition cycles.

Diagnostic Aids
    • A history DTC is evidence of an intermittent condition.
    • If DTC B2201 is current, cycle the ignition switch from OFF to RUN. If this DTC is still current, replace the LH front power window switch assembly. The individual power window switches are an integral part of the LH front power window switch assembly. The individual power window switches cannot be replaced separately. Refer to Front Door Switch Replacement .

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. Check the module input state using the normal input status.

    2.

  2. Check to see that the input is seen by the module.

Step

Action

Yes

No

1

Did you perform A Diagnostic System Check - Door Systems?

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 Driver Window Switch parameter for the appropriate window switch in the driver door module (DDM) data list.

Does the scan tool display Idle?

Go to Step 3

Go to Step 4

3

  1. Activate the appropriate driver door window switch.
  2. With the scan tool, observe the driver door window switch parameter for the appropriate switch.

Does the door window switch parameter change state?

Go to Diagnostic Aids

Go to Step 4

4

Inspect for poor connections/terminal tension at the driver door window switch harness connector. 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 6

Go to Step 5

5

Replace the driver door window switch. Refer to Front Door Switch Replacement .

Did you complete the replacement?

Go to Step 6

--

6
  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