Central Locking Functions
Unlocked status
The figure shows the ZV motor drive "1" and the corresponding mechanics in the turn-catch lock in unlocked status.
The connecting piece "4" can be turned from the door lock or by the locking button in conjunction with the connecting pieces "5" and "6". When the part "4" is turned it uncouples the door outer handle from the opening mechanism.
Locked status
Fig. 2: Locked status:
The figure shows the ZV motor drive and the corresponding mechanics in the turn-catch lock when locked.
The part "4" has been turned. Consequently, the slide "3" has been moved. The pin contact "7" is switched. It switches B+ to the ZV module and signals "lock".
Sequence of electric central locking:
- The electric motors "10" in the ZV motor drives "1" receive their power supply. The spindle nuts "2" in the ZV motor drives are moved by means of a spindle. They are connected to the slide blocks "3" and thus cause the connecting pieces "4" to rotate. The motors switch off as soon as the limit switches "9" are reached.
As a result, the outer door handles on all doors are uncoupled from the opening mechanics. A locked door can be unlocked by way of the inner door handle. The handle must be pulled twice for this purpose.
The vehicle can be unlocked once again by pulling up the locking button. Part "4" is turned back by means of parts "5" and "6". The slide block "3" is moved away from the pin contact "7". This signals "unlock" and initiates the power supply to the ZV motors. The part "4" is turned back to the unlock position.
The vehicle can also be unlocked by means of the door lock. In this case, the part "4" is turned from the door lock.
Arrested status
Explanation:
Arresting is only possible from the driver's door lock. In arrest mode, the locking button is mechanically uncoupled from the ZV motor drive.
When the vehicle is arrested, it can only be unlocked via the door locks of the driver's door or passengers door.
Although the locking buttons can still be pulled up in arrest mode, they do not unlock the doors.
The rear lid can be unlocked also in arrest status however, no doors are unlocked in this case.
Procedure:
A microswitch is operated by the driver's door lock when it is turned to the "arrest" position. The ZV module powers the electric motors "10" in the ZV motor drives "1". The spindle nut "2" is moved. It uncouples from the slide blocks "3" and moves the lever "8". This lever uncouples the locking button from the "unlocking mechanism" in the turn-catch lock.
Unlocking is now only possible via the door locks. They are connected to part "4". Part "4" moves back the sliding block "3" when the door lock is turned to the "unlock" position. The slide block "3" is moved away from the pin contact "7". This signals "unlock" and triggers the power supply to the ZV motors. The spindle nuts "2" in all ZV motor drives are moved back to the "unlock" position.
Arrest Vehicle
General
The "arrested" status is intended to prevent the vehicle being opened by way of impermissible manipulation.
Since it is not possible to unlock and therefore open the doors from the inside in arrested status, this function is linked to a series of conditions.
Conditions
Arresting is only possible when:
- ignition and terminal R are switched off, i.e. ignition switch in position "0"
- the driver's door was opened at least once after switching off the ignition,
- the driver's door is closed.
Arresting is only possible from the driver's door. Release/unlock is possible from the driver's and passenger's door.
Crash Sensor
A crash sensor which connects ground to the module in the case of excessive deceleration (e.g. impact or collision) is connected to the ZV module. When this signal is detected, the module activates all ZV drives and the vehicle is unlocked.
In addition, the interior lights are switched on (only with special option interior light package!) and a ground signal is sent to the crash alarm (not installed in all models). The hazard warning system is switched on by this module.
Initially, the central locking system is locked out after the crash sensor has triggered. The lockout is canceled by locking and unlocking the vehicle with the locking button or the door lock.
Special Features
Emergency Operation
If the central locking system fails due to an electrical fault, the driver's and passenger's doors can be unlocked via the door locks even when arrested.
Defect Information
If one of the following defects occurs:
- driver's or passenger's door is not locked or unlocked.
- ZV motor drive for passenger's or driver's door faulty.
- rear lid is not locked.
This is signaled to the operator by the following sequence:
- after locking, the vehicle is automatically unlocked once again. The function is carried out on the second locking attempt.
or
- after unlocking, the vehicle is automatically locked once again. The function is carried out on the second unlocking attempt.
Repeat Lockout
If the central locking system is operated more than 30 times within 2 minutes, the entire system is switched off by a repeat lockout function for approx. 2 minutes. This function prevents overloading of the ZV motor drives.