For 1990-2009 cars

### Circuit 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 appropriate driver door module (DDM), passenger front door module (PDM), left rear door module (LRDM), or right rear door module (RRDM), via the GMLAN serial data circuit. The door module, upon receiving the message, examines other relevant information available on the GMLAN serial data circuit in order to determine if conditions are correct for window operation to occur. If conditions are correct, the door module commands 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 .

### DTC Descriptors

This diagnostic procedure supports the following DTCs:

• | DTC B3375 LF Window Up Switch Circuit

• | DTC B3380 LF Window Down Switch Circuit

• | DTC B3385 RF Window Up Switch Circuit

• | DTC B3390 RF Window Down Switch Circuit

• | DTC B3395 LR Window Up Switch Circuit

• | DTC B3450 LR Window Down Switch Circuit

• | DTC B3455 RR Window Up Switch Circuit

• | DTC B3460 RR Window Down Switch Circuit

• | DTC B3485 LF Window Express Up Switch Circuit

• | DTC B3490 RF Window Express Up Switch Circuit

• | DTC B3495 LR Window Express Up Switch Circuit

• | DTC B3500 RR Window Express Up Switch Circuit

• | DTC B3505 LF Window Express Up Switch Circuit

• | DTC B3510 RF Window Express Down Switch Circuit

• | DTC B3515 LR Window Express Down Switch Circuit

• | DTC B3520 RR Window Express Down Switch Circuit

This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description .

DTC Symptom | DTC Symptom Descriptor
--- | ---
02 | Short to Ground

### Conditions for Running the DTC

• | The DDM and the DDSA must be powered.

• | DTC B1325 Battery Voltage Out of Range, must not be current.

### Conditions for Setting the DTC

The DDSA detects that one of the window switches is closed for more than 15 continuous seconds.

### Action Taken When the DTC Sets

The action taken depends on which switch contacts are closed:

• | If a DDSA WINDOW UP switch is closed for more than 15 seconds, both UP and DOWN signals from that switch will be ignored until the WINDOW UP input is no longer detected, or the ignition is cycled from OFF to RUN.

• | If a DDSA WINDOW DOWN switch is closed for more than 15 seconds, both UP and DOWN signals from that switch will be ignored until the WINDOW DOWN input is no longer detected, or the ignition is cycled from OFF to RUN.

• | If a DDSA WINDOW EXPRESS switch is closed for more than 15 seconds, express functions for that switch are disabled until the DDM no longer detects the input.

### Conditions for Clearing the DTC

• | The condition responsible for setting the DTC no longer exists.

• | You issue a scan tool CLEAR DTCs command.

• | After 40 consecutive warm-up cycles without failure, the history DTC will be cleared.

### Diagnostic Aids

Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Moveable Window Schematics and Door Control Module Schematics Connector End View Reference: Vehicle Access Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the appropriate Driver LF, RF, LR, or RR Window Switch parameter in the driver door switch assembly (DDSA) data list.

Does the scan tool display Idle?

Go to Step 3

Go to Step 4

3 |

1. Activate the appropriate window switch from the DDSA.
2. With the scan tool, observe the appropriate Driver LF, RF, LR, or RR Window Switch parameter.

Does the Window Switch parameter change state?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 4

4 | Inspect for poor connections at the DDSA harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 6 | Go to Step 5
5 | Replace the DDSA. Refer to Door Lock and Side Window Switch Replacement - Driver Side . Did you complete the replacement? | Go to Step 6 | --
6 |

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