GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 XLR 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 DTC B3377, B3382, B3387, B3392, B3467, or B3472

Circuit Description

The window switch contacts are the window switch inputs for the driver door switch (DDS). These contacts allow the DDS to detect a window direction request. When the window switch is activated, the DDS sends a serial data message to the DDM or PDM to command the window to move in the direction selected. The DDS monitors the switch contacts to determine how long the switch has been activated. If the DDS detects that the switch contacts are activated for greater than 30 seconds, a DTC is set.

    • DTC B3377 Left Front Window Up Switch Circuit Low
    • DTC 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

Conditions for Setting the DTC
    • The DDS detects that the switch contacts are activated.
    • Condition must be present for greater than 30 seconds.

Action Taken When the DTC Sets

Stores DTC B3377, B3382, B3387, B3392, B3467 or B3472 in DDS memory.

Conditions for Clearing the DTC
    • The DDS no longer detects that the switch contacts are activated for greater than 30 seconds, and:
    • The DTC is cleared using a scan tool.

Diagnostic Aids
    • The following conditions may cause an intermittent malfunction:
       - The mirror switch was activated for longer than 30 seconds.
       - The mirror switch is shorted internally.
    • If the DTC does not reset after the code is cleared, then the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test Description

The number below refers to the step number on the diagnostic table.

  1. Tests for the normal state of the window switch using a scan tool. The scan tool will display the normal state as Idle, and Up. Down, Express Up or Express Down when the switch is activated.

Step

Action

Yes

No

Schematic Reference: Outside Rearview Mirror Schematics and Door Control Module Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Vehicle Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the appropriate window switch parameter in the DDS data list.

Does the scan tool display Idle?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Inspect for poor connections at the harness connector of the driver door switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 5

Go to Step 4

4

Replace the driver door switch. Refer to Front Door Switch Replacement .

Did you complete the replacement?

Go to Step 5

--

5
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK