Locks: Description and Operation

Handles, Locks, Latches and Entry Systems

COMPONENT LOCATION - CENTRAL LOCKING SYSTEM (Sheet 1 of 2)









COMPONENT LOCATION - CENTRAL LOCKING SYSTEM (Sheet 2 of 2)









INTRODUCTION
The hinged panels are secured with latches and strikers. A remotely operated Central Locking System (CLS) controls the locking and unlocking of the door latches.
Two levels of CLS are available; remote central locking and an optional passive entry system.

CENTRAL LOCKING SYSTEM (CLS)
A Radio Frequency (RF) Smart Key, without an integrated key, is a standard fitment allowing the vehicle to be locked and unlocked by pressing the appropriate handset buttons. The Smart Key is available in three variants depending on market requirements. These can be identified by a suffix change to the base part number as follows:
- AA = 315 MHz
- BA = 433 MHz
- CA = 315 MHz Low power.
A new Passive Entry and Passive Start system is introduced. This system allows the driver to unlock and start the vehicle without using a vehicle key in a door lock or ignition switch. The passive entry system is an optional fitment. The passive start system is a standard fitment on all vehicles and allows the driver to start the vehicle without the use of a vehicle key. The system is combined with the passive anti-theft immobilization system. For additional information, refer to Anti-Theft - Passive
Emergency access to the vehicle is provided by a concealed key barrel located in the LH door handle only and in the liftgate. An emergency, removable key is fitted into the Smart Key. Operation of either key barrel unlocks the vehicle but does not disarm the alarm system. On European market vehicles, the emergency liftgate key barrel is concealed behind the license plate. The key barrel in the LH door is covered by a plastic cover which can be removed by inserting the blade of the emergency key into a slot in the underside of the cover.
The vehicle can be centrally locked and unlocked using the emergency key barrel. If the alarm is not armed the vehicle can be centrally unlocked. If the alarm is armed only the LH door can be opened using the emergency key and the alarm will be triggered. The vehicle cannot be double locked or the alarm system armed using the emergency key.
The vehicle can be centrally locked and unlocked from inside using the interior door handle release levers. Central locking and unlocking can also be performed using lock and unlock buttons on the Touch Screen Display (TSD).
The driver can select locking options, single point entry or drive away locking for example, from a menu available on the TSD.

Central Locking - RF Remote System
The RF CLS provides locking and unlocking of the vehicle from inside and outside of the vehicle. The system provides additional security by double locking the doors and liftgate from outside the vehicle.
The system is operated using buttons on the Smart Key. RF signals from the Smart Key are received by a RF receiver located in the overhead console, above the windshield. The RF receiver is available in two variants depending on market requirements. These can identified by a suffix change to the base part number as follows:
- AA = 315 MHz
- BA = 433 MHz.
Additional buttons on the Smart Key provide for the convenience operation of the liftgate release, headlamp delay and panic alarm functions. A global open or close feature is also available in certain markets using the lock/unlock buttons.

Passive Start
The passive start system, which is standard on all vehicles, uses the Smart Key as a driver identification and authorization device. The system is controlled by a keyless vehicle module located on the RH 'A' pillar. Three Low Frequency (LF) antennae (six if passive entry option is fitted) are positioned in specific locations in the vehicle and transmit a LF signal to the Smart Key.
On receipt of the LF signals, the Smart Key transmits a RF signal which is received by the remote receiver. Once the keyless vehicle module has approved the Smart Key, the ignition status is changed to 'accessory' by the Central Junction Box (CJB). The ignition can be switched on by pressing the 'start/stop' button, located in the center console. Starting of the vehicle is achieved by simultaneously depressing the brake pedal and pressing the 'start/stop' button. The engine can be switched off by pressing the start/stop button for a second time.

NOTE:
The Smart Key does not need to be in the vicinity of the vehicle to switch the engine off.
In the event that the passive start system is unable to authorize the Smart Key, a start control unit is located in the center armrest. The start control unit allows the Smart Key to be inserted into a slot and allows the Smart Key transponder data to be exchanged in a conventional manner. Once the transponder data is authorized, the CJB permits the ignition to be switched on.

Passive Entry
On vehicles fitted with the optional passive entry system, the vehicle can be unlocked without the use of a key or pressing buttons on the Smart Key. The Smart Key operates for the passive entry system in addition to the passive start system.
The passive entry system is controlled by the keyless vehicle module and the six LF antennae. When the Smart Key is within one meter of the vehicle it receives the LF signals from the keyless vehicle module and the LF antennae and responds with an RF transmission of its authorization code. The RF signal is received by the RF receiver and passed to the keyless vehicle module which checks and approves the code as valid. The keyless vehicle module transmits this information to the CJB. The CJB then passes an unlock request to the door modules. When a door handle is pulled or the exterior liftgate release button is pressed, the applicable door module will allow the doors or the liftgate to be unlocked and opened.
Locking of the vehicle is performed by pressing a button located on each exterior door handle with the Smart Key within a one meter range of the vehicle. When the button is pressed, the Smart Key transmits a RF signal which is verified by the keyless vehicle module and allows the doors to be locked or double locked and the alarm system to be armed.
To double lock the vehicle, the button on the exterior door handle must be pressed twice within three seconds with the Smart Key in a one meter range of the vehicle.
If a door, liftgate or hood is ajar when an attempt to lock the vehicle is made, an error tone is emitted and the ajar panel will not lock. For additional information, refer to Anti-Theft - Active

LATCHES
Two hood latches are located on the bulkhead, below the windscreen. A hood release lever is located below the instrument panel on the LH 'A' pillar and is connected with a Bowden cable to the latches. A hood ajar switch is integrated in the LH hood latch.
The door latches are located at the rear of each door and engage with a striker on the 'B' pillar. Each door latch motor assembly contains microswitches for lock and unlock and door ajar. Two motors provide for the central door locking and the double locking feature. The electrical control for the door latch components is provided by the CJB and auxiliary junction box via the driver's and passenger door modules.
The interior door handles are connected by a cable to the latch release mechanisms. The interior door handles also incorporate a locking facility to allow the doors to be locked from inside the vehicle, when the doors are closed and activate the central locking system. If a door is ajar the locking feature is inhibited.
The liftgate latch is attached to the bottom of the liftgate. The latch can be released electrically by pressing the interior release button located in the auxiliary lighting switch, the exterior release button located in the license plate finisher or the liftgate release button on the Smart Key. On North American Specification (NAS) vehicles an emergency release cable is attached to the latch. This allows the latch to be manually opened by pulling a handle located in the liftgate interior trim.
The fuel filler is electrically locked by a motor located on the fuel flap housing. The flap is locked when the vehicle is locked and alarmed and can be released by pressing the fuel flap release switch located in the auxiliary lighting switch.

CONTROL DIAGRAM - PASSIVE ENTRY SYSTEM

NOTE:
A = Hardwired









CONTROL DIAGRAM - CENTRAL LOCKING SYSTEM

NOTE:
A = Hardwired