B2201 LF Window Switch Stuck In Down Position

Circuit Description

The simple bus interface (SBI), CKT 217 (LT BLU), provides a communications path from the LH front power window switch to the driver door module (DDM). The DDM contains the following 2 types of software:

^ Switch message decoding software
^ SBI diagnostic software

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

Conditions for Setting the DTC

DTC B2201 sets any time one of the driver door power window switches is continuously closed in either the UP or DOWN positions for a period greater than 15 seconds.

DTC B1982 (battery voltage high) and DTC 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 the switch command again changes state or the ignition cycles from OFF to RUN.

Conditions for Clearing the MIL/DTC

^ This DTC will set from current to history when the window down input cycles off or when the power mode changes from OFF to RUN.
^ The history DTC will clear after 50 ignition cycles.
^ Use a scan tool in order to clear a history DTC.

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 left front power window switch assembly. The individual power window switches are an integral part of the left front power window assembly. The individual power window switches cannot be replaced separately.

Test Description

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

1. Perform the Power Door Diagnostic System Check prior to continuing the diagnosis of this DTC.

2. This step tests for other set DTCs.

3. This step verifies the operation of all of the power windows.

5. This step tests the left front power window switch.