B3527

CIRCUIT DESCRIPTION
The window lockout 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 ground signal generated by the window lockout switch and assigns a digital message to it. The DDSA then sends this message over the Serial Data Class 2 line to the Left Rear Door Module (LRDM) and the Right Rear Door Module (RRDM) to prohibit window operation from the two rear door window switches.

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 rear windows will not be operational from either rear door window switch.

CONDITIONS FOR RUNNING THE DTC
With the ignition switch ON, the DDSA checks the switch inputs every 3 seconds regardless of source voltage.

CONDITIONS FOR SETTING THE DTC
If the Driver Door Switch Assembly (DDSA) determines that the window lockout switch is closed (grounded) for more than 30 continuous seconds, it sets this DTC.

ACTION TAKEN WHEN THE DTC SETS
The DDSA ignores inputs from the window lockout switch.

CONDITIONS FOR CLEARING THE DTC
The DDSA clears the current code when it no longer receives inputs from the lockout switch.

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

TEST DESCRIPTION

Steps 1-6:

The number below refers to the step number on the diagnostic table.
2. Checks the existing state of the window lockout switch by using the current state of the input parameter.