Window and Glass: Overview Ford Escape I

Principles of Operation

The power operated windows are activated by switches on each passenger door or by a multiple switch on the driver door. The driver door window control switch is a two stage switch and incorporates the one-touch up/down feature.

Voltage to the power window system is supplied through the accessory delay relay and the central junction box (CJB) fuse 25 (30A). When the delayed accessory relay is energized, voltage is supplied to all window switches. When a window switch is activated power and ground paths are supplied to the appropriate side of the door window regulator to drive it in the desired direction.

The delayed accessory relay provides power for the operation of the power windows. The delayed accessory feature is active when the ignition switch is in the RUN or the ACC position, or when the ignition switch is changed from RUN or ACC to the OFF/LOCK position and the LF and RF doors are closed.

The generic electronic module (GEM) will deactivate the delayed accessory feature when

1. The LF door is ajar and the ignition switch is in the OFF/LOCK or KEY-OUT position.
2. The RF door is ajar and the ignition switch is in the OFF/LOCK or KEY-OUT position.
3. 10 minutes have elapsed since the ignition switch was changed from ACC or RUN to the OFF/LOCK position.

The rear heated window grid is activated by the rear window defrost switch located on the instrument panel. When the rear window defrost switch is activated power is supplied to the switch on indicator and the rear defrost relay located in the battery junction box (BJB). When the rear defrost relay coil is energized, voltage from the BJB is supplied to the rear heated window grid located on the liftgate glass.

Scheme 2

1. Verify the customer concern by operating the power windows system or the rear window defroster system.
2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle: check that the program card is correctly installed. check the connections to the vehicle. check the ignition switch position.
4. If the diagnostic tool still does not communicate with the vehicle, refer to manual that came with tool.
5. Carry out the «DATA LINK DIAGNOSTICS»(ref-177213-S11953477042005052500000) test. If the diagnostic tool responds with: CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, see «MODULE COMMUNICATIONS NETWORK»(ref-177213) . NO RESP/NOT EQUIP for generic electronic module (GEM) module, see MULTIFUNCTION ELECTRONIC CONTROL MODULES . SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and can't out self-test diagnostics for the GEM.
6. If the DTCs retrieved are related to the concern, go to the «GEM Diagnostic Trouble Code (DTC) Index»(ref-177682-S30497525382005060300000) to continue diagnostics.
7. If no DTCs related to the concern are retrieved, proceed to the «Symptom Chart»(ref-177682-S28685297792005060300000) to continue diagnostics.