GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 Seville 🢒 Body and Accessories 🢒 Doors 🢒 DTC B3527

Circuit Description

The switch that failed and generated this diagnostic trouble code (DTC) is a built in part of the driver door switch assembly (DDSA). There are no external circuits. The DDSA contains a microprocessor which takes the signal generated by this switch and assigns a digital message to it. The DDSA sends this message over the power door serial data line to the driver door module (DDM). The DDM then sends the message, via the power door serial data line, to the left rear door module (LRDM), and the right rear door module (RRDM). When the rear window lockout function is activated, the rear door modules will not allow the rear windows to be operated from the rear door window switches. The rear windows can still be operated from the rear window switches on the driver door.

Conditions for Running the DTC

The switch input is checked every 300 milliseconds regardless of source voltage.

Conditions for Setting the DTC

If the DDM receives the information that the switch has been grounded (closed) for more than 30 continuous seconds, it sets the DTC.

Action Taken When the DTC Sets

The DDM ignores inputs from the window lockout switch.

Conditions for Clearing the DTC

The DDM clears the current code when it no longer receives the message that the switch is closed.

Test Description

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

  1. Checks the existing state of the window lockout switch on the driver door switch assembly by using the current state of the input parameter.

Step

Action

Yes

No

Schematic Reference: Power Window Schematics

1

Did you perform the Door Systems Diagnostic System Check?

Go to Step  2

Go to Diagnostic System Check - Door Systems

2

  1. Install a Scan tool.
  2. Turn ON the ignition with the engine OFF.
  3. With the scan tool, observe the Window Lockout Sw. parameter in the Driver Door Module Inputs list.

Does the scan tool display Idle?

Go to Step  3

Go to Step  4

3
  1. Activate the window lockout switch.
  2. With the scan tool, observe the Window Lockout Sw. parameter.

Does the parameter change state?

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

Go to Step  4

4

Inspect for poor connections at the driver door switch assembly harness connector. 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  6

Go to Step  5

5

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

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