The window lockout switch or circuits that generate this DTC are built-in parts of the driver door switch assembly (DDSA). There are no external circuits. The DDSA internally supplies power and ground to the contacts of the window lockout switch. When the window lockout switch is operated, the switch contacts momentarily close to ground, providing the DDSA with a signal. The DDSA processes the signal, assigns a digital message to it, then sends the message to the passenger door modules via the class 2 serial data circuit. Upon receiving a class 2 message to lockout the passenger door windows, the passenger door modules will not allow their associated window to operate from the associated passenger door window switch.

If the window lockout is OFF deactivated, it will transition to ON activated when the switch button is momentarily pressed once. If the window lockout is already ON, it will transition to OFF when the switch button is momentarily pressed once. When the lockout is active, the switch button LED will be illuminated and the passenger door windows will not be operational from the passenger door window switches. However, the passenger door windows can still be operated from the appropriate power window switch built into the DDSA.

This diagnostic procedure supports the following DTC:

DTC B3527 Window Lockout Switch Circuit Low

With the ignition switch ON, the DDSA inspects the switch inputs every 3 seconds regardless of source voltage.

If the DDSA determines that the window lockout switch is closed, grounded for more than 30 continuous seconds, it sets this DTC.

The DDSA ignores inputs from the window lockout switch.

The DDSA clears the current code when it no longer receives inputs from the lockout switch.

An intermittently sticking switch can cause this DTC to set. Refer to Testing for Electrical Intermittents .

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

2. This step verifies the existing state of the window lockout switch by using the current state of the input parameter.