Circuit Description
The circuits for the LH Front Power Window Switch consist of the following:
| • | LH Front Power Window Switch |
| • | Simple Bus Interface (SBI) |
| • | Driver Door Module |
The LH front power window switch assembly is different from the other power window switches in the vehicle in that it contains an internal microprocessor. The LH front power window switch assembly reports all switch activity in the form of SBI messages to the driver door module. The actual diagnostic software program for DTC B2201 is contained in the driver door module and the diagnostic is run no less than once every 300 milliseconds. Problems involving the driver door module or the SBI may set other DTCs and affect the operation of the power door locks and the outside rear view mirrors.
Conditions for Setting the DTC
If the driver door module detects that the SBI messages from the LH front power window switch assembly show that the left front window switch has been in the DOWN 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 current only while the problem is present. While this DTC is current, the driver door module will ignore the actuation of the left front window switch.
Conditions for Clearing the DTC
| • | This DTC will set from current to history when the window DOWN input cycles off or the power mode changes from OFF to RUN. |
| • | The history DTC will clear after 50 ignition cycles. |
| • | Use the On-Board clearing DTC feature. |
| • | Use a scan tool. |
Diagnostic Aids
| • | A history DTC is evidence of a intermittent problem. |
| • | If DTC B2201 is current, cycle the ignition switch from OFF to RUN. If this DTC is still current, perform the following diagnostic. |
Test Description
The numbers below refer to the step numbers on the diagnostic table:
-
Perform the Power Door 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 |
|---|---|---|---|---|
Did you perform Diagnostic System Check - Power Door Systems ? | -- | Go to Step 2 | ||
Replace the LH front power window switch. Refer to Front Door Switch Replacement . Did you complete the repair? | -- | Go to Step 3 | -- | |
Are all DTCs cleared? | -- | -- |
