Components
Components
The Central Locking system of the E65/E66 consists of the following components:
- Car Access System module (CAS).
- Door Modules (4).
- Power Module.
- Door lock assemblies.
- Trunk lock actuator and soft close drive assembly.
- Engine hood contact.
- Fuel tank filler door actuator.
- Central locking button (CLB).
- Passenger compartment trunk lid release button (TOEHKI).
- Trunk-lid button, inside of trunk lid (TOEHKK, only if equipped with HKL).
- Outside trunk lid release button (TOEHK).
- Hotel switch in lockable compartment of the center console (hotel).
Car Access System (CAS)
As Central Locking Master (ZV master), the CAS controls all the higher-level functions of the Central Locking system.
It centrally monitors the battery voltage of the ZV (lock actuators) assemblies.
The ZV assemblies function within a voltage range of 9 V to 16V.
Activation of the ZV assemblies is controlled as follows:
- For safety reasons, the "crash unlocking" function is activated independently of the battery voltage.
- If the CAS determines a value less than 9 V or greater than 16 V, there is no forwarding or implementation of operator prompts by the CAS.
- The motors in the doors are blanked out based on the evaluation of the local voltage at the door modules (motors for Soft Close Automatic and motors for electric opening).
Door Modules
Each door contains a door module (1) for the control of all functions contained or attached to the door. The door module is located inside of the door attached to the inner door carrier.
The door modules receive the signals for locking and un-locking requests from the CAS over the K-CAN-P.
The door modules are also responsible for interpreting the signals from the hall sensors in the door lock assemblies and providing them to the CAS.
The output for the ZV drives is controlled by internal final stages.
Power Module
Within the Central Locking system the Power Module is responsible for the output control of the trunk lock actuator, soft close motor and the fuel filler flap actuator.
The Power module is also responsible for relaying the signals:
- Status of the trunk lid open/closed
- Status of the outside trunk lid button
- Status of timed-arrest for the trunk and filler flap ZV drives
Door Lock Assemblies
The door lock and ZV drives consist of a single integrated unit. The door lock assembly contains two servo motors, the locking mechanism and hall sensors for position sensing. The hall sensors signal:
- Door contact (open or closed)
- Position of mechanical lock (locked/ unlocked)
If the vehicle is equipped with the optional soft close doors there is an additional motor for pulling the door closed as well as two more hall sensors. The hall sensors signal:
- "Standby" position
- "Locking pawl switch" position
The Drivers lock assembly contains two hall sensors for the signalling of the position of the external lock cylinder in the drivers door. The hall sensors signal:
- Unlock request
- Lock request
The rear doors are equipped with child lock out switches preventing the rear doors from being opened from the inside.
Trunk lock Actuator and Soft Close Drive Assembly
The trunk lock and trunk lock actuator are two separate components. The lock actuator is controlled by the PM and contains a micro-switch to signal the lock status of the trunk. This input is sent via the K-CAN-P to the CAS for the monitoring of the trunk (e.g. DWA, CC)
The signal is also an input to the PM to run the soft close motor and to control the trunk lights.
The soft close motor is carried over from the E38.It contains an interval micro-switch to signal the PM that the motor has completed 180° of rotation.
Engine-Hood Contact
The engine-hood contact is a simple ground (N/O) contact. This contact is closed when the hood is open and is monitored for the purposes of theft prevention and CC messages (Check Control). The status is distributed by the CAS to the vehicle electrical system.
Fuel Tank Filler Door Actuator
The assembly for unlocking and locking the fuel tank filler door is operated by the Power Module. The commands for this purpose are controlled by the ZV master (CAS). The fueltank flap is only locked with ZV central double locking (ZS).
Central Locking Button (CLB)
The Central Locking button is located in the iDrive Comfort Area as part of the IHKA control panel. However, the CLB is not processed by the IHKA, it has a direct connection to the CAS.
The button is a rocker switch that provides two separate signals; one for unlock and another for lock. The signal provided is a momentary ground.
The operation of the CLB remains the same as the previous E38:
- Central locking/unlocking of the doors (the fuel filler flap remains open).
- Removing a vehicle from double lock to central lock (emergency function)
Passenger Compartment Trunk Lid Release Button (TOEHKI).
The interior trunk release button is located in the iDrive Driving Area to the left of the steering column. It provides a momentary ground signal to the CAS when pressed.
The signal is passed on to the PM over the K-CAN-P.
The button is active from KL R when the hotel setting is off and the vehicle speed is below 2mph.
Outside Trunk-Lid Release Button (TOEHK).
The outside trunk lid release button is a direct input to the Power Module. It provides a momentary ground when pressed.
The button is active when the vehicle is unlocked and the hotel setting is off.
Hotel Switch
The Hotel switch is located inside of the lockable compartment of the center console. It is a direct input to the CAS as a ground signal when the switch is in the "lock" position.
Locking of the compartment is done using the mechanical key integrated into the Remote Control which the customers then takes with them. Only the "electronic key" is then handed over to the hotel valet.
When the setting is "locked", the interior and outside trunk release button inputs are ignored.
The CAS sends the telegram over the bus that the hotel setting is engaged. This is used,for example, by the DWA to continue to monitor the trunk and the hood even though the vehicle is unlocked.