Power Windows Land Rover Range Rover III

GENERAL

Electric windows are installed in all four doors. The front windows are controlled by their respective door modules integrated into the window switch packs. The rear windows are controlled by the Body Control Unit (BCU). The BCU and the door modules communicate with each other on the P bus. Window operating features are market dependent and include one-shot opening and closing, convenience opening and closing, and anti-trap. Market options for window operation are set centrally in the Body Control Unit (BCU).

WINDOW SWITCHES

Individual window switches are installed in each of the three passenger doors. Window switches for all of the windows, and a child lock switch to isolate the rear windows, are installed in the driver's door. All of the window switches have two switching positions in each direction. The first switching position operates the window in the inching mode, where the window moves until the switch is released or until it reaches the fully open or closed position. The second switching position operates the window in the one-shot mode.

DOOR MODULE HARNESS CONNECTORS C2016 AND C2017 PIN DETAILS

DOOR MODULE HARNESS CONNECTORS C2057 AND C2058 PIN DETAILS

ANTI-TRAP SENSORS

An anti-trap sensor is installed along the top of each window aperture, just outside the travel path of the window glass. Each anti-trap sensor consists of a rubber covered contact strip connected to ground and to a power supply from the door (front windows) or BCU (rear windows). When the anti-trap sensor is pressed the resistance across the contact strip is reduced. If a window is being closed and the door /BCU detects a drop in resistance across the associated anti-trap sensor, it immediately (in less than 20 milliseconds) reverses the window.

WINDOW REGULATORS

Cable operated window regulators powered by an electric motor are installed in each of the doors. (Scheme 1)and (Scheme 2).

Scheme 1

Scheme 2

WINDOWS CONTROL DIAGRAM

(Scheme 3)

Scheme 3

Electric window operation using the window switches is enabled while the ignition switch is in positions I and II, and for 16 minutes after switching from position I to position 0. Window operation is immediately disabled when a front door is opened When the switches in the driver's door are used to operate the passenger windows or the child lock, the driver door module outputs a related message on the P bus. The passenger door module or the BCU respond to the message by operating the appropriate window or the child lock function. While the child lock is engaged, the BCU ignores inputs from the rear window switches, and the driver door module illuminates a LED in the child lock switch.

END OF TRAVEL SHUT OFF

End of travel shut off for the window motors is determined by monitoring the current draw of the motors. Each time it switches on a window motor, the door or BCU measures the window motor current for 22 milliseconds, in 2 milliseconds intervals. The maximum value measured within that time is stored as the switch-on current, which must be 5 A minimum. When the window motor current next exceeds the switch-on current minus 2 A, the door /BCU assumes the window has reached the end of its travel and, after 0.5 second, switches off the power supply to the window motor, even if a window switch is still being activated. Measuring the switch-on current for each switching operation automatically compensates for changes of load with varying ambient conditions etc. To protect the window motors from overheating if the end of travel shut off function fails, window motor activation in both directions is limited to 8 seconds.

ONE SHOT OPENING AND CLOSING

One shot opening and closing is activated by selecting the second switching positions on the window switch. One- shot opening and closing is enabled on all windows.

ANTI-TRAP

The anti-trap function is enabled for window closing in both the inching and one-shot modes. If an anti-trap sensor is activated while a window is closing, the window motor is reversed for 0.5 second. UK models feature a longer reversing time after a trap detection. The reversing time is proportionate to the preceding closing time and varies between 0.5 and 2.0 seconds. In an emergency, e.g. if the anti-trap sensor is faulty, the anti-trap function can be overridden by holding the window switch in the one-shot closed position.

REPETITION BLOCKING

To prevent the window motors from overheating, the door modules and the BCU record the run time for each motor they control. The run time, in seconds, is added to a counter on completion of each activation, and one second is deducted from the counter for every three seconds the window motor is inactive. If the counter exceeds 60 seconds, no new activation for the window motor is accepted until the counter is below 60 seconds again. The only exception is a reversing operation triggered by the anti-trap function, which is always accepted regardless of the counter value.

DISCONNECTING & RECONNECTING BATTERY

Before disconnecting the battery, disable the alarm system and switch off all electrical equipment. If the radio is to be serviced, ensure the security code has been deactivated. The ground lead must be disconnected first and reconnected last. Ensure battery leads are routed correctly and are not close to any potential chafing points.

SUPPLEMENTARY RESTRAINT SYSTEM PRECAUTIONS

The following precautions must be adhered to when working on the SRS system.

General Precautions

The SRS contains components which could be potentially hazardous to service personnel if not serviced and handled correctly. The following guidelines are intended to alert personnel to potential sources of danger and emphasize the importance of ensuring the integrity of SRS components fitted to the vehicle.

It should be noted that these precautions are not restricted to operations performed when servicing the SRS system. The same care should be exercised when working on ancillary systems and components located in the vicinity of SRS components; these include but are not limited to

1. Steering system Steering wheel airbag, rotary couple
2. Front fascia Passenger front airbag
3. Interior trim Head airbag modules - front and rear
4. Seats Front seat belt pre-tensioners
5. Electrical system SRS harnesses, link leads and connectors
6. Front doors Side (thorax) air bags

Making The System Safe

Before working on or in the vicinity of SRS components, ensure the system is rendered safe by performing the following operations.

1. Remove the ignition key
2. Disconnect battery, earth lead first.
3. Wait 10 minutes for the SRS power circuit to discharge before commencing work.

The SRS uses energy reserve capacitors to keep the system active in the event of electrical supply failure under crash conditions. It is necessary to allow the capacitors sufficient time to discharge (10 minutes) in order to avoid the risk of accidental deployment.

COMPONENT LOCATIONS

(Scheme 4)

Scheme 4

Removal

1. Remove 3 screws securing trim casing to door. (Scheme 5)
2. Release access cover in trim casing and remove screw.
3. Carefully release 13 clips securing trim casing to door. (Scheme 6)
4. Ensure center trim casing clip is released. Pull trim casing horizontally from 7 clips securing the upper edge to inner glass seal, avoid damage to the locking button on final release. (Scheme 7)
5. Release door operating cable from door casing and move aside.
6. Disconnect 6 multiplugs from door harness and remove trim casing. (Scheme 8)
7. Remove 3 Torx screws securing speaker to trim casing and remove speaker. (Scheme 9)
8. Remove 13 clips from door casing. (Scheme 10)
9. Remove retaining clip from door handle reinforcement bracket.
10. Remove 2 nuts securing door handle reinforcement bracket. Remove bracket.
11. Remove 2 nuts securing door pocket finisher, carefully release finisher from 3 clips and remove finisher. (Scheme 11)
12. Remove 2 Torx screws securing inner door pocket finisher to casing. Remove finisher. (Scheme 12)
13. Depress clip and remove trim casing light assembly. (Scheme 13)
14. Carefully release window lift switch pack from door trim casing. (Scheme 14)
15. Remove access cover from door casing. (Scheme 15)

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Installation

1. Fit access cover to door casing.
2. Position switch pack to door casing, align and secure clips.
3. Fit light assembly to door casing.
4. Fit inner door pocket finisher and secure with screws.
5. Position outer door pocket finisher to clips, fit nuts and tighten to 3 Nm (2.2 lbf.ft).
6. Position door handle reinforcement bracket, fit nuts and tighten to 6 Nm (4.4 lbf.ft).
7. Fit and secure clip to reinforcement bracket.
8. Fit door casing retaining clips.
9. Fit speaker to trim casing and secure with Torx screws.
10. Connect multiplugs.
11. Connect cable to interior door release.
12. Fit front door trim casing.
13. Fit screws securing door trim casing.
14. Position and secure screw cover.

1. Remove 3 screws securing trim casing to door.
2. Release access cover in trim casing and remove screw. (Scheme 16)
3. Carefully release 11 clips securing trim casing to door.
4. Ensure center trim casing clip is released.
5. Release 6 clips securing door casing to inner glass seal horizontally, avoid damage to locking button on final release. (Scheme 17)
6. Release door operating cable from door casing and move aside.
7. Disconnect 3 multiplugs from door harness and remove trim casing. (Scheme 18)
8. Remove 3 Torx screws securing speaker to trim casing and remove speaker. (Scheme 9)
9. Remove 11 clips from trim casing.
10. Remove retaining clip from door handle reinforcement bracket. (Scheme 19)
11. Remove 2 nuts securing door handle reinforcement bracket and remove bracket.
12. Remove Torx screw securing door pocket finisher to casing. Remove finisher. (Scheme 20)
13. Depress clip and remove trim casing light assembly. (Scheme 21)
14. Carefully release window lift switch from trim casing. (Scheme 22)

Scheme 16

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Scheme 21

Scheme 22

1. Fit access cover to door casing.
2. Position switch pack to door casing, align and secure clips.
3. Fit inner door pocket finisher and secure with screw.
4. Position outer door pocket finisher to clips, fit nuts and tighten to 3 Nm (2.2 lbf.ft).
5. Position door handle reinforcement bracket, fit nuts and tighten to 6 Nm (4.4 lbf.ft).
6. Fit and secure clip to reinforcement bracket.
7. Fit door casing retaining clips.
8. Fit speaker to trim casing and secure with Torx screws.
9. Connect multiplugs.
10. Connect cable to interior door release.
11. Fit rear door trim casing.
12. Fit screws securing door trim casing.
13. Position and secure screw cover.

1. Remove front door glass. See «GLASS - FRONT DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows).
2. Disconnect multiplug from regulator motor.
3. Remove clip securing cable to side impact protection beam. (Scheme 23)
4. Remove Torx bolt and clamp securing regulator to side impact protection beam.
5. Remove 2 lower bolts securing regulator to door frame and discard. (Scheme 24)
6. Remove 3 Torx bolts securing regulator to door frame and withdraw regulator through access panel.

Scheme 23

Scheme 24

1. Position regulator to door and unclip motor transit package from rail.
2. Fit upper bolts and clamp, tighten to 10 Nm (7 lbf.ft).
3. Fit new lower bolts and tighten to 10 Nm (7 lbf.ft).
4. Fit cable retaining clip.
5. Connect multiplug to motor.

Removal & Installation

1. Remove rear door glass. See «GLASS - REAR DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows).
2. Disconnect multiplug from regulator motor. (Scheme 25)
3. Remove and discard regulator lower fixing bolt.
4. Remove 2 Torx bolts securing regulator to door frame and withdraw regulator through access panel.
5. Position regulator to door and unclip motor transit package from rail.
6. Fit regulator upper bolts and tighten to 10 Nm (7 lbf.ft).
7. Fit new lower bolt and tighten to 10 Nm (7 lbf.ft).
8. Fit rear door glass.

Scheme 25

1. Lower door glass.
2. Remove plastic sheet. See «PLASTIC SHEET - FRONT DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows).
3. Loosen two Torx bolts securing glass to regulator. (Scheme 26)
4. Remove glass.
5. Position glass to regulator.
6. Lightly tighten Torx bolts.
7. Raise regulator, check glass alignment, adjust as necessary.
8. Tighten Torx bolts securing front glass to 10 Nm (7 lbf.ft).
9. Fit plastic sheet.

Scheme 26

1. Lower door glass.
2. Remove plastic sheet. See «PLASTIC SHEET REAR DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows).
3. Remove 2 clips securing upper door frame finisher, disconnect anti trap multiplug and remove finisher. (Scheme 27)
4. Remove 3 Torx screws securing rear glass channel to door frame.
5. Withdraw glass channel from frame and position channel seal aside. (Scheme 28)
6. Remove Torx bolt securing glass to regulator.
7. Remove glass.

Scheme 27

Scheme 28

1. Position glass to regulator, fit bolt and tighten to 10 Nm (7 lbf.ft).
2. Fit glass channel to frame and secure with screws.
3. Fit and secure seal.
4. Connect multiplug, fit and secure upper finisher.
5. Fit plastic sheet.
6. Raise and lower glass to check operation.

1. Remove door airbag. See «AIRBAG MODULE-SIDE IMPACT-FRONT DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows) .
2. Disconnect speaker multiplug for access.
3. Remove plastic sheet.
4. Fit plastic sheet.
5. Connect multiplug to speaker.
6. Fit door airbag.

1. Remove rear door trim casing. See «TRIM CASING REAR DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows) .
2. Disconnect speaker multiplug for access.
3. Remove plastic sheet.
4. Fit plastic sheet.
5. Connect multiplug to speaker.
6. Fit rear door trim casing.

Before disconnecting the battery, ensure all text and cautions in the battery disconnection section are observed.

1. Make the SRS system safe. See «Making The System Safe»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows__making-the-system-safe) under SERVICE PRECAUTIONS in SUPPLEMENTARY RESTRAINT SYSTEM PRECAUTIONS.
2. Remove door trim casing. See «TRIM CASING - FRONT DOOR (PANEL)»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows) .
3. Disconnect multiplug from airbag module.
4. Remove and discard 3 bolts securing airbag module.

1. Remove drivers door trim casing. See «DOOR TRIM CASING - FRONT DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows).
2. Remove 4 Torx screws securing switch pack to door casing. (Scheme 29)
3. Remove switch pack assembly.
4. Fit switch pack and secure with screws.
5. Fit drivers door trim casing.

Scheme 29

Window Switch - Front Passenger

See TRIM CASING - FRONT DOOR (PANEL) for removal & installation procedure of the front passenger window switch.

1. Remove rear door trim casing. See «TRIM CASING REAR DOOR»(/land-rover/range-rover/iii-2002-2005/remont/windows/#power-windows).
2. Release 4 clips securing switch pack to rear door casing. (Scheme 30)
3. Remove switch pack assembly.
4. Fit switch pack and secure with clips.
5. Fit rear door trim casing.

Scheme 30

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

WIRING DIAGRAMS

See POWER WINDOWS in SYSTEM WIRING DIAGRAMS article for 2003 Range Rover.

See POWER WINDOWS in SYSTEM WIRING DIAGRAMS article for 2004 Range Rover.

See also:
• GLASS - FRONT DOOR
• Making The System Safe