Description
Glass, Frames and Mechanisms
NOTE:
A = Hardwired; N = Medium speed CAN (controller area network) bus; O = LIN (local interconnect network) bus
Door Glass Opening Mechanisms
Roof Opening Panel
PRINCIPLES OF OPERATION
Door Glass Opening Mechanisms
The CJB (central junction box) provides a power supply to the driver door switch pack when the vehicle is in power mode 6 (ignition on). Switch requests made using the driver door switch pack are then delivered to the driver door module over the LIN (local interconnect network) bus.
The driver door module interprets the request made using the switch pack and responds as follows:
- If the request is for driver's side rear window operation, a request is transmitted over the LIN (local interconnect network) bus to the driver side rear door module.
- If the request is for front passenger window operation, a request is transmitted over the medium speed CAN (controller area network) bus to the passenger door module.
- If the request is for passenger side rear window operation, a request is transmitted over the medium speed CAN (controller area network) bus to the passenger door module. This request is then forwarded over the LIN (local interconnect network) bus to the passenger side rear door module.
Door Glass Opening and Closing
Each door module provides 2 signal feeds to its window lift switch. When a switch request is made, a ground path is created on one of the lines via the door module. From this the door module can determine which direction of travel has been requested.
The door modules power the door glass motors on receipt of a switch request or a request for Global Closing (see below). The door modules provide feed and return paths to their respective motor, which can switch depending on the direction of travel requested.
The door glass motor assemblies also contain a Hall effect sensor. The Hall effect sensor allows the door module to determine the position of the door glass and if a motor stall condition has taken place.
Global Closing
The CJB (central junction box) provides a constant battery feed to the 4 door modules. This feed is used to operate the 'Global Closing' feature. Global Closing allows all 4 windows to be closed using the Radio Frequency (RF) handset.
NOTE:
The roof opening panel is not part of the Global Closing feature.
The Global Closing feature is activated by pressing and holding the 'lock' button on the RF handset for 3 seconds. The request for Global Closing is provided to the CJB (central junction box) by the RF receiver. The CJB (central junction box) then transmits this request to the driver and passenger door modules over the medium speed CAN (controller area network) bus.
Initialization
When the vehicle is delivered from the factory the window lift system will operate slowly until it has been initialized. The initialization process should be carried out using the PDI (pre-delivery inspection) feature contained within the Land Rover approved diagnostic system. For more information, refer to the PDI (pre-delivery inspection) manual.
Similarly, if a door module is replaced, the new module will require initialization before handover to the customer. The initialization process for a new module is carried out using the 'New Module' feature contained within the Land Rover approved diagnostic system.
Roof Opening Panel
The roller blind will only operate when the vehicle is in power mode 6 (ignition on). Power is supplied to the roller blind control unit/motor by the BCM, which supplies both a permanent battery and ignition power supply.
Switch Inputs
The roller blind rocker switch is mounted in the roof console and is provided 2 signal feeds by the control unit. When the switch is in the rest (central) position, both connections from the control unit are open circuit. When the switch is pressed to open the roller blind, the signal feed from pin 4 of the control unit electrical connector is provided a ground path through the switch contacts. When the switch is pressed to close the roller blind, the switch grounds the signal feed from pin 8 of the control unit electrical connector.
Anti-Trap
The roller blind motor is calibrated to detect a blockage that will prevent the roller blind from closing. The force required to close the roller blind will not exceed 100 Newtons (N). If a blockage is detected, the control unit will power the motor in the opposite direction to reverse the position of the roller blind by 200 mm.
Calibration
If the battery is disconnected, or the power supply is interrupted whilst the roller blind is moving, it will need to be re-calibrated.
Once the battery is reconnected, or the power supply is restored, recalibrate the roller blind as follows:
- Switch the ignition on, start the engine and leave running during calibration process.
- Ensure the blind is in the fully closed position; press the closed switch to achieve this.
- Depress and hold the close switch again and wait for the cables to double click (it should take about 30 sec), release switch.
- Within 3 seconds, depress close switch again holding the button down.
- The blind will automatically travel to open position (approx. 300mm) and then closed position.
- Do not release the switch until the blind is in fully closed position, if the switch is released by mistake, repeat the complete procedure.
DOOR MODULES
In addition to controlling the window lift system, the front door modules also control:
- Door locking. For additional information, refer to Handles, Locks, Latches and Entry Systems Locations
- Door mirror adjustment and heating. For additional information, refer to Rear View Mirrors Locations
For additional information, refer to Control Components Control Components
- Door mirror lamps. For additional information, refer to Interior Lighting Interior Lighting
The rear door modules control window lift and door locking only.
The door modules are color coded for position on the vehicle. The driver door module and both rear door modules are black. The passenger door module is gray. The electrical wiring harness connectors are also color coded to match the door modules.
NOTE:
Both rear door modules are identical.
If a front door module develops a fault, a DTC (diagnostic trouble code) is stored in its memory. The DTC (diagnostic trouble code) can be read using the Land Rover approved diagnostic system. If either of the rear door modules develops a fault, the DTC (diagnostic trouble code) is stored in the respective front door module. For additional information, refer to Glass, Frames and Mechanisms Locations
ROLLER BLIND CONTROL UNIT/MOTOR
The combined control unit and motor assembly is mounted behind the headlining, to the front of the roller blind. The control unit uses inputs from the BCM and the roller blind switch to control operation of the motor.
The end of the motor armature is formed as a worm drive, which drives a gear attached to the end of the motor assembly. The gear engages with helixed cables in the roller blind frame to form a rack and pinion drive.
The control unit incorporates a Hall effect sensor which is used to count the revolutions made by the motor armature. By counting the revolutions the control unit can accurately determine when the roller blind has reached its fully open, or closed by comparing the armature rotation value against values stored in its memory. The values are stored in the control unit's memory when the initialization routine has been carried out.
ROLLER BLIND
