Central Door Locking Description

Four methods are available for locking the doors; locking using vehicle key, remote handset locking, locking using the CDL switch on the fascia or speed related locking. The anti-theft alarm operates in conjunction with the CDL system. Refer to Anti-Theft Alarm - Description and Operation in Accessories and Optional Equipment, "Antitheft and Alarm Systems." Description and Operation

Two levels of door locking are available; Central Door Locking (CDL) and Superlocking.

CDL
CDL allows the doors to be locked from inside and outside of the vehicle. In the CDL state, the doors can be opened from inside the vehicle or unlocked using the vehicle key or the remote handset. CDL can be initiated using the vehicle key in the driver's door lock, the remote handset or the CDL switch on the fascia.

CDL looking is also used for the optional speed related locking. This feature
automatically locks all the doors when the vehicle speed exceeds 4 mph (7 km/h).

Superlocking
Superlocking only allows the doors to be locked from outside the vehicle. When superlocked, the doors cannot be opened from inside the vehicle. Superlocking can be initiated with two turns of the vehicle key in the driver's door lock or the remote handset. In the superlocked state the remote handset is used to unlock the doors. In the event of the remote handset not being available, the vehicle key can be used in the driver's door lock to enter an Emergency Key Access (EKA) code which will unlock the doors and disarm the anti-theft alarm.

An inertia switch is located in the engine compartment. In the event of a collision, the inertia switch will trip. When the inertia switch is tripped with the ignition on and the alarm disarmed, all doors will automatically unlock and locking of the doors will be prevented until the inertia switch is reset.

The locking system can be interrogated using Test Book for diagnostic information.

CDL Supply
Circuit supply
A feed from the battery positive terminal is connected by an R wire to the engine compartment fusebox where it passes to fusible link 3 and fuse 13.

The feed from fusible link 3 is connected on an NR wire to the passenger compartment fusebox where it passes through fuses 1 and 20.

From fuse 1 in the passenger compartment fusebox the feed is connected to the contacts of the four electronic CDL relays in the passenger compartment fusebox; When the relay contacts are open they are connected on a B wire from the passenger compartment fusebox to earth header C0017 LHD/C0018 RHD.

From fuse 20 in the passenger compartment fusebox the feed is connected on a P wire, via header C0289 LHD/C0294 RHD, to Body Control Unit (BCU) pin C0661-19. A second feed from fuse 20 is connected on a GU wire to the passive coil which surrounds the ignition switch.

The feed from fuse 13 is connected on a PN wire to BCU pin C0660-13 and provides a permanent battery supply to the BCU. A second feed from fuse 13 is connected on a PN wire to the passenger compartment fusebox and supplies power to the electronic CDL relays in the fusebox. A third feed from fuse 13 is connected on an NB wire to the inertia switch.