GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2001 🢒 Aurora 🢒 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) . The DDSA contains a microprocessor which takes the signal generated by the switch and assigns a digital message to the switch signal. The DDSA then sends this message over the power door serial data link to the driver door module (DDM).

Conditions for Running the DTC

The DDM must be powered and must not have DTCs B1327-Battery Low Voltage or B1328-Battery High Voltage set for this DTC to set.

Conditions for Setting the DTC

If the driver door module (DDM) receives the message that the lockout switch is closed for more than 30 continuous seconds the DDM sets this DTC.

Action Taken When the DTC Sets

When the lockout switch DTC is set, the DDSA and DDM default to the last valid switch input. If the last valid input was to enable lock out, the indicator LED will be lit and the passenger windows will not operate from the passenger window switches. If the last valid input was to disable lock out, the indicator will not be lit and the passenger window switches will operate the windows.

Conditions for Clearing the DTC

The DDM clears this current DTC when the switch signal is no longer received. The DTC is stored as a history DTC. The history DTC will clear either after 50 OFF/ON cycles of the ignition switch without a repeated failure or in response to a scan tool command.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Checks the existing state of the driver door window switch module passenger window lockout switch 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 leaving the engine OFF.
  3. Observe the Window Lockout Sw. parameter in the Driver Door Module data list using the scan tool.

Does the scan tool display Inactive?

Go to Step  3

Go to Step  4

3
  1. Activate the window lockout switch.
  2. Observe the Window Lockout Sw. parameter using the scan tool.

Does the Window Lockout Sw. parameter change state?

Go to Step  9

Go to Step  4

4
  1. Turn OFF the ignition.
  2. Disconnect the driver door switch assembly (DDSA).
  3. Turn ON the ignition leaving the engine OFF.
  4. Observe the Window Lock out Sw. parameter using the scan tool.

Does the scan tool indicate the Inactive state?

Go to Step  6

Go to Step  5

5

Inspect for poor connections at the driver door module 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  9

Go to Step  7

6

Inspect for poor connections at the driver door switch assembly (DDSA) 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  9

Go to Step  8

7

Replace the driver door module. Refer to Door Control Module Replacement .

Did you complete the replacement?

Go to Step  9

--

8

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

Did you complete the replacement?

Go to Step  9

--

9
  1. Clear the DTCs using the scan tool.
  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