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 door switch assembly (DDSA). The DDSA 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 DDSA with a specific window switch signal. The DDSA 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 class 2 serial data circuit. The door module, upon receiving the message, examines other relevant information available on the class 2 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. For more detailed information concerning power window operation refer to Power Windows Description and Operation .
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
| • | The DDSA detects that the switch contacts are activated. |
| • | Condition must be present for greater than 30 seconds. |
Actions Taken When the DTC Sets
Stores DTC B3377, B3382, B3387, B3392, B3467 or B3472 in DDSA memory.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | You issue a scan tool CLEAR DTCs command. |
Diagnostic Aids
The following conditions may cause an intermittent malfunction:
| • | A window switch was activated for longer than 30 seconds. |
| • | The DDSA is shorted internally. |
Reference Information
Schematic Reference
Connector End View Reference
Window Systems Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
Ignition ON, install a scan tool, clear all DTCs and operate the windows within the Conditions for Running the DTC.
| ⇒ | If DTC B3377, B3382, B3387, B3392, B3467, or B3472 resets as current, replace the DDSA. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
