Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B3377: Left Front Window Up Switch Circuit LowDTC B3382: Left Front Window Down Switch Circuit Low
DTC B3387: Right Front Window Up Switch Circuit Low
DTC B3392: Right Front Window Down Switch Circuit Low
DTC B3467: Left Front Window Express Up or Down Circuit Low
DTC B3472: Right Front Window Express Up or Down Circuit Low
Circuit/System Description
The window switches are contained within the driver window switch. The driver window switch internally supplies power and ground to the contacts of each of the integral window switches. When one of the switches is operated, the switch contacts close, providing the driver window switch with a specific window switch signal. The driver window switch processes this signal, assigns a digital message to it, and sends the message to the driver door module (DDM) or passenger door module (PDM) via the serial data circuit. The door module, upon receiving the message, examines other relevant information available on the serial data line in order to determine if conditions are correct for window operation to occur. If conditions are correct, the door module applies power and ground to the associated window motor and circuits in order to move the window.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The driver window switch detects a continuous UP, DOWN, EXPRESS UP or EXPRESS DOWN command for greater than 30 seconds.
Action Taken When the DTC Sets
The DDM will ignore the affected input from the driver window switch.
Conditions for Clearing the DTC
| • | The DTC will be current for as long as the fault is present. |
| • | When the fault is no longer present, the DTC will be a history DTC. |
| • | A history DTC will clear after 50 ignition cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Power Windows Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, operate the power window within the conditions for setting the DTC, verify the DTC does not reset.
| ⇒ | If the DTC resets, replace the driver window switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
