Power Windows - Service Information Jeep Grand Cherokee WK2

DESCRIPTION

The power window system allows each of the door windows to be raised and lowered electrically by actuating a switch on the trim panel of each respective door. A master switch on the driver side front door trim panel allows the driver to raise or lower each of the passenger door windows and to lock out the individual switches on the passenger doors from operation. The power window system receives battery feed through a circuit breaker, only when the ignition switch is in the On position.

The power window system includes the power window switches on each door trim panel, the circuit breaker, and the power window motors inside each door. The power switches are all similar in design and function with exception of the drivers side power switch module however, they are all serviced in the same manner. The power motors are similar as well and can be serviced separately from the window regulators.

POWER WINDOW SWITCH

The power windows are controlled by a window/lock switch on the trim panel of each front door. Switches in the driver door window/lock switch allows the driver to control the passenger windows.

The power window switch for the driver side front door window has a second detent position beyond the normal Down position that provides an automatic one-touch window down feature. This feature is controlled by the window/lock switch.

The power window switches control the battery and ground feeds to the power window motors. All of the passenger door power window switches receive their battery and ground feeds through the circuitry of the window/lock switch. When the power window lockout switch is in the Lock position, the battery feed for the individual passenger door power window switches is interrupted.

POWER WINDOW MOTOR

A permanent magnet reversible motor moves the window regulator through an integral gearbox mechanism. A positive and negative battery connection to the two motor terminals will cause the motor to rotate in one direction. Reversing the current through these same two connections will cause the motor to rotate in the opposite direction.

In addition, each power window motor is equipped with an integral self-resetting circuit breaker to protect the motor from overloads. The power window motor and gearbox assembly cannot be adjusted or repaired. If damaged or ineffective, the entire unit must be replaced.

EXPRESS DOWN WINDOW FEATURE

This feature allows you to remotely lower both front door windows at the same time. To use this feature, press and release the UNLOCK button on the RKE transmitter and then immediately press and hold the UNLOCK button until the windows lower to the desired level or until they lower completely.

DIAGNOSIS AND TESTING - POWER WINDOWS

For complete circuit diagrams, refer to the appropriate wiring information.

ALL WINDOWS INOPERATIVE

1. Check the circuit breaker. If OK, refer to 2 . If not OK, replace the inoperative circuit breaker.
2. Disconnect and isolate the battery negative cable. Remove the window/lock switch from the driver side front door trim panel. Unplug the wire harness connector.
3. Check for continuity between the ground circuit cavity of the door module wire harness connector and a good ground. If OK, refer to 4 . If not OK, repair the circuit to ground as required.
4. Connect the battery negative cable. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run) circuit cavity of the window/lock switch wire harness connector. If OK. Refer to «SWITCH, LOCK , DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/door-locks-anti-theft-systems/#power-locks-service-information) . If not OK, repair the circuit as required.

ONE WINDOW INOPERATIVE

The window glass must be free to slide up and down for the power window motor to function properly. If the glass is not free to move up and down, the motor will overload and trip the integral circuit breaker. To determine if the glass is free, disconnect the regulator from the glass. Then slide the window up and down by hand.

There is an alternate method to check if the glass is free. Position the glass between the up and down stops. Then, shake the glass in the door. Check that the glass can be moved slightly from side to side, front to rear, and up and down. Then check that the glass is not bound tight in the tracks. If the glass is free, proceed with the diagnosis that follows. If the glass is not free, determine the cause of the condition.

If the only inoperative window is in the driver or passenger side front door and the preceding checks have not identified a problem. Refer to MOTOR, WINDOW REGULATOR , DIAGNOSIS AND TESTING . If the problem being diagnosed involves only the Auto-down feature for the driver side front door window, but all of the power windows are operational, replace the driver's side window/lock switch. For diagnosis of the window/lock switch. Refer to SWITCH, LOCK , DIAGNOSIS AND TESTING . For a rear power window problem proceed with the following

1. Disconnect and isolate the battery negative cable. Unplug the wire harness connector from the power window switch unit on the door with the inoperative power window. Check for continuity between the ground circuit cavity of the power window switch wire harness connector and a good ground. There should be continuity. If OK, refer to 2 . If not OK, repair the open circuit to the power window and door lock master switch as required.
2. Connect the battery negative cable. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run) circuit cavity in the body half of the power window switch unit wire harness connector. If OK, refer to 3 . If not OK, repair the open circuit to the power window and door lock master switch as required.
3. Test the power window switch continuity. Refer to «SWITCH, POWER WINDOW , DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/windows/#power-windows-service-information) . If OK, refer to 4 . If not OK, replace the power window switch.
4. Check the continuity in each circuit between the inoperative power window switch wire harness connector cavities and the corresponding power window motor wire harness connector cavities. If OK. Refer to «MOTOR, WINDOW REGULATOR , DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/windows/#power-windows-service-information) . If not OK, repair the open circuit(s) as required.

Note. All passenger door power window switches receive their battery and ground feed for operating the passenger door power window motors through the driver side power window and lock master switch and wire harness connector.

Express-Up/Express-Down Possible Concerns

Note. The battery must be fully charged or the vehicle running for proper calibration of the front door module.

Note. The following procedure must be performed anytime the power window system has been serviced in either front door or, there is a possible concern with a door module calibration.

Express-up / Express-down possible concerns.

1. Glass will not lower all the way down flush to the belt-line.
2. Glass will not raise fully; wind noise / water leak.
3. Glass will not raise automatically (Expess-up) after lifting the switch to the second detent and releasing.

To clear/denormalize the door module memory, perform the following procedure

CLEAR/DENORMALIZE

1. Check and repair any door module Diagnostic Trouble Code (DTC) (s) before proceeding.
2. Using a scan tool, under the miscellaneous functions menu select (Denormalize Window/Reset ECU), and follow the directions to clear/denormalize the door module memory.

To relearn/normalize the door module memory, perform the following procedure

RELEARN/NORMALIZE

Note. The battery must be fully charged or the vehicle running before proceeding.

1. If needed, place the vehicle battery on charge or have the engine running.
2. To relearn/normalize the door module, start by raising the door glass to the full-up position by pulling up on the window switch to its second detent and hold the switch until the door glass is fully closed. Continue to hold the window switch up for two seconds after the door glass is full closed.
3. Lower the door glass to the full-down position by pushing down (depress) the window switch to its second detent and hold the switch until the door glass is fully open. Continue to hold the window switch down for two seconds after the door glass is fully open.
4. Check the operation of the express-up and express-down features.
5. If the express up does not work, repeat the procedure starting at step #2, waiting for three seconds after the window stops.
6. Check that the door glass reverses when in the express-up mode by holding a pen in the path of the glass.
7. Recheck and repair any door module DTC's as needed

DIAGNOSIS AND TESTING - WINDOW MOTOR

For complete circuit diagrams, refer to the appropriate wiring information.

1. Disconnect and isolate the battery negative cable. Remove the trim panel from the door with the inoperative power window.
2. Unplug the power window motor wire harness connector. Apply 12 volts across the motor terminals to check its operation in one direction. Reverse the connections across the motor terminals to check the operation in the other direction. If the window is in the full up or full down position, the motor will not operate in that direction by design. If OK, repair the circuits from the power window motor to the power window switch as required. If not OK, replace the inoperative motor.
3. If the motor operates in both directions, check the operation of the window glass and lift mechanism through its complete up and down travel. There should be no binding or sticking of the window glass or lift mechanism through the entire travel range. If not OK, check the window glass, tracks, and regulator for sticking, binding, or improper adjustment.

Scheme 5

Scheme 6

1. Disconnect and isolate the negative battery cable.
2. Remove the door interior trim panel (2). Refer to «PANEL, DOOR TRIM , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
3. Disconnect the power window motor electrical connector from the motor electrical connector receptacle (3).
4. Remove the three fasteners (4) that secure the power window motor and gear assembly (2) to the carrier plate (1) and remove the motor and gear assembly.

INSTALLATION

Note. The power window motor may need to actuated momentarily to line up the gear in the drive assembly with the regulator.

1. Connect the power window motor electrical connector to the motor electrical connector receptacle (3).
2. Position the power window motor and gear assembly (2) on the carrier plate (1) aligning the drive gear with the regulator.
3. If necessary, temporarily connect the window switch assembly and battery to actuate the motor.
4. Install and tighten the three fasteners (4) that secure the power window motor and gear assembly to the carrier plate.
5. Reinstall the door interior trim panel (2). Refer to «PANEL, DOOR TRIM , INSTALLATION»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
6. Connect the negative battery cable.

Scheme 7

A front door power switch module and bezel unit is located near the forward end of the arm rest of each front door trim panel. Two different modules are used: a driver side module (1), and a passenger side module (2). Each switch button in both modules is identified with either an International Control and Display Symbol icon or text that clearly identifies the switch function, and each switch button has a Light Emitting Diode (LED) unit soldered to the switch circuit board that provides back lighting of the icon or text for night visibility.

Each switch module housing is secured within the trim panel armrest by four spring clip retainers (3), two on each side of the switch module housing. The passenger side switch module includes a small cubby bin. A connector receptacle (4) integral to the switch module housing connect the switches to the vehicle electrical system through dedicated take outs and connectors of the door wire harness.

The front door power switch modules include the following switches

1. Power Lock Switch - A momentary switch button to control the Lock function of the power lock system.
2. Power Unlock Switch - A momentary switch button to control the Unlock function of the power lock system.
3. Power Mirror Selector Switch (Driver Side Switch Only) - Three mirror selector switch buttons choose the power mirror to be adjusted, R (right), L (left) or a power fold position (both mirrors).
4. Power Mirror Direction Control Switch (Driver Side Switch Only) - After a power mirror is selected, pressing down on one of the arrows on the momentary mirror direction switch will move the selected mirror in that direction for as long as it is held down until the limit of the mirror travel is reached.
5. Power Window Lockout Switch (Driver Side Switch Only) - A latching push-button power window lockout switch allows the vehicle operator to lock out the power window switches on each front and rear passenger door so that those windows may be operated only from the driver side front door master switches. When the lockout switch is engaged, the LED back lighting for each front and rear passenger door power window switch is extinguished.
6. Power Window Switches - A single two-way, momentary power window switch with a push-to-open and a lift-to-close tab is provide for each passenger door window while the driver side switch module contains four of these power window switches, one switch dedicated to each door window. The switch tab for the driver side front door power window has a second detent in the down direction which is used to activate the Auto-Down (also known as express down or one-touch down) feature. A second detent in the up direction on both front door power window switches activates the Express-Up feature.

The front door power switch modules cannot be adjusted or repaired. If damaged or ineffective, the entire driver side or passenger side front door switch module must be replaced as a unit.

OPERATION

The driver side front door power switch module combines a power lock switch, a power window switch for each of the four door windows including auto-down (also known as one-touch down or express down) and express up features for both front door windows, a power window lockout switch, a power mirror selector switch, and a power mirror adjustment switch in a single unit. The passenger side power door switch module combines a power lock switch and a passenger side front door power window switch with the auto-down and express up features.

The driver side front door power switch module provides resistor multiplexed outputs to the driver door module indicating the power lock switch selection, hard wired analog outputs indicating the power mirror selector switch and adjustment switch selections, and electronic message outputs over a Local Interface Network (LIN) data bus connection indicating the power window switch selections. The passenger side front door power switch module provides resistor multiplexed outputs to the passenger door module indicating both the power lock and power window switch selections.

The hard-wired circuits between the driver side front door power switch module and the driver side door module or the rear door power window switches may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic controls and communication between the switch module and the door module or in the diagnosis of the electronic controls and communication between other modules and the door module that provide some features of the power lock, power mirror or power window systems. The most reliable, efficient, and accurate means to diagnose the driver side power switch module or the electronic controls and communication related to power lock, power mirror or power window system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

The hard-wired circuits between the passenger side front door power switch module and the passenger side door module may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic controls and communication between other modules and the door module that provide some features of the power lock or power window systems. The most reliable, efficient, and accurate means to diagnose the power switch module or the electronic controls and communication related to power lock or power window system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

DIAGNOSIS AND TESTING - POWER WINDOW SWITCH

The front door power window switches are included in the window/lock switch . Refer to SWITCH, LOCK , DIAGNOSIS AND TESTING .

The Light-Emitting Diode (LED) illumination lamps for all of the power window switches receive battery current through the power window circuit breaker in the junction block. If all of the LEDs are inoperative in the power window switch and the power windows are inoperative. Refer to DIAGNOSIS AND TESTING . If the power windows operate, but any or all of the LEDs are inoperative, the power window and lock switch units with the inoperative LED(s) must be replaced. For complete circuit diagrams, refer to the appropriate wiring information.

Scheme 8

1. Disconnect and isolate the battery negative cable.
2. Using a trim stick or another suitable wide flat-bladed tool, pry the bezel of the front door switch module (1) up and away from the front door trim panel arm rest (2) far enough to disengage the four spring steel retainers of the switch from the arm rest opening.
3. Pull the switch module away from the mounting hold of the arm rest far enough to access and disconnect the door wire harness connector (3) from the switch connector receptacle.
4. Remove the switch module from the vehicle.

REAR SWITCH ASSEMBLY

Note. The passenger rear window switches for this vehicle are serviced in the same manner as the front switch module.

1. Refer to 1 .

FRONT SWITCH MODULE

1. Position the front door switch module (1) close enough to the mounting hole in the arm rest (2) of the front door trim panel to access and reconnect the front door wire harness connector (3) to the switch connector receptacle.
2. Align the switch module to the arm rest mounting hole.
3. Using hand pressure, press the switch module firmly and evenly into the mounting hole until the four spring steel retainers of the switch are fully engaged and the switch bezel is fully seated against the arm rest.
4. Connect the battery negative cable.

Note. The passenger rear window switches for this vehicle are serviced in the same manner as the front switch module.

1. Refer to 1 .

See also:
• SWITCH, LOCK , DIAGNOSIS AND TESTING
• PANEL, DOOR TRIM , REMOVAL
• DIAGNOSIS AND TESTING
• MOTOR, WINDOW REGULATOR , DIAGNOSIS AND TESTING