Circuit Description
The circuit for the LH Power Window consists of the following:
| • | LH Front Power Window Switch (LFPWS) Assembly |
| • | Simple Bus Interface (SBI) |
| • | LH Front Door Module (LFDM) |
The LFPWS Assembly is different from the other power window switches in the vehicle in that it contains an internal microprocessor. This LFPWS Assembly contains a software program to sample the individual window switches and to report all switch activity in the form of SBI messages to the LFDM. The actual diagnostic software program for DTC B2200 is contained in the LFDM and this diagnostic is run no less than once every 300 milliseconds. Problems involving the LFDM or the SBI may set other DTC and will affect the operation of the power door locks and outside rearview mirrors.
Conditions for Setting the DTC
If the LFDM detects that the SBI messages from the LFPWS Assembly show that the LH front power window switch has been in the UP position for 15 continuous seconds, this DTC will be set current. This diagnostic will not run if either DTC B1982 (Battery Voltage High) or B1983 (Battery Voltage Low) are current.
Action Taken When the DTC Sets
This DTC is dynamic, and as such, is set current only while the problem is present. While this DTC is current, the LFDM will ignore the actuation of the LH power window switch.
Conditions for Clearing the DTC
| • | This DTC will set from current to history when the window UP input cycles off or the power mode changes from OFF to RUN. |
| • | The history DTC will clear after 50 ignition cycles. |
| • | The scan tool or the vehicleOn Board Diagnostic System can be used to clear the history DTC. |
Diagnostic Aids
| • | A history DTC is evidence of a intermittent problem. |
| • | If DTC B2200 is current, cycle the ignition switch from OFF to RUN. If this DTC is still current, replace the LFPWS Assembly since the power window switches are an integral part of the LFPWS Assembly and cannot be replaced. Refer to LFPWS Assembly Replacement. |
Test Description
The numbers below refer to the step numbers on the diagnostic table:
-
Perform the Power Door System Diagnostic System Check prior to continuing the diagnosis of this DTC.
-
This repair procedure requires power window switch replacement.
-
Clear all DTCs following repair procedure completion.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the Power Door System Diagnostic System Check performed? | -- | Go to Step 2 | ||
Replace the LH front power window switch. Refer to Front Door Switch Replacement . Is the repair complete? | -- | Go to Step 3 | -- | |
Are all DTCs cleared? | -- | -- |
