B3172

CIRCUIT DESCRIPTION
The window switch that failed and generated this Diagnostic Trouble Code (DTC) is mounted on one of the passenger doors and wired to its associated door module, (Passenger Front Door Module (PDM), Left Rear Door Module (LRDM), or Right Rear Door Module (RRDM)). When the switch is activated, the associated passenger door module examines the switch signal and determines if conditions are correct for that window function to occur. If conditions are correct, the door module then supplies power and ground to the associated window motor and circuits to operate the window. The window motors are reversible. When an Up movement is requested, the module applies battery positive voltage to the Up circuit and ground to the Down circuit. When a Down movement is requested, the module reverses the polarity, and applies battery positive voltage to the Down circuit, and ground to the Up circuit.

CONDITIONS FOR RUNNING THE DTC
The PDM, LRDM, or RRDM must be powered and can not have B1327-Battery Voltage Low or B1328-Battery Voltage High set for one of these DTCs to set.

CONDITIONS FOR SETTING THE DTC
If the PDM, LRDM, or RRDM detects that its associated window switch is closed for more than 15 continuous seconds, it sets the DTC.

ACTION TAKEN WHEN THE DTC SETS
The action taken depends on which switch contacts are closed:
^ If an up switch contact is closed for more than 15 seconds, both UP and DOWN movements are disabled until the UP switch contact is no longer closed, or, the power mode changes from OFF to RUN.
^ If a down switch contact is closed for more than 15 seconds, only the DOWN movement is disabled until the DOWN switch contact is no longer closed, or, the power mode changes from OFF to RUN. UP movement is operational regardless of the DOWN switch state.
^ If an express switch contact is closed for more than 15 seconds, the Express movement is disabled until the express switch contact is no longer closed, or, the power mode changes from OFF to RUN.

CONDITIONS FOR CLEARING THE DTC
The PDM, LRDM, or RRDM clears the current DTC when the switch message is no longer received.

DIAGNOSTIC AIDS
An intermittently sticking or binding switch may cause the DTC to set. Refer to Testing for Electrical Intermittents.

TEST DESCRIPTION

Steps 1-10:

The number(s) below refer to the step number(s) on the diagnostic table.
2. This step checks the module input state by using the normal input status.
3. This step checks to see that the input is seen by the module.
4. This step determines if the switch or the switch signal circuits between the switch and its associated module are shorted to ground.