Workshop Manuals Factory service & repair Land Rover
01 Range Rover 2002MY ON Workshop Manual - System Description and Operation - LM - 6th Edition - NAS02 03 04 05 06 07 08 09 ENGINE - V810 11 12 ENGINE MANAGEMENT SYSTEM – V813 14 FUEL DELIVERY SYSTEM – V815 16 17 18 19 20 COOLING SYSTEM – V821 22 MANIFOLDS AND EXHAUST SYSTEM – V823 TRANSFER BOX24 AUTOMATIC TRANSMISSION – ZF 5HP2425 26 DRIVE AND PROPELLER SHAFTS27 28 FINAL DRIVE29 STEERING30 31 SUSPENSION32 33 34 35 BRAKES36 37 38 RESTRAINT SYSTEMS39 40 41 DOORS42 INTERIOR TRIM COMPONENTS43 44 45 SCREENS46 SEATS47 48 SUNROOF49 50 AIR CONDITIONING51 52 53 54 55 56 57 WIPERS AND WASHERS58 59 CHARGING AND STARTING60 61 62 63 64 LIGHTING65 66 BODY CONTROL UNIT67 68 COMMUNICATION DATA BUSES69 70 71 SECURITY72 WINDOWS73 74 75 ENTERTAINMENT AND INFORMATION SYSTEMS76 DRIVING AIDS77 78 INSTRUMENTS
Land Rover L322 Range Rover System Description and Operation71 · SECURITY
71 · General

Locking System

Make
Land Rover
Model
Range Rover L322 Range Rover System Description and Operation
Section
Operation › Locking System
SECURITYLocking System
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SECURITY

86-5-20 DESCRIPTION AND OPERATION

Operation

Locking System
The locking system allows the doors and fuel filler flap to be centrally locked and unlocked using the CDL switch, the 
drivers door lock and the remote handset. The system has two locking states: locked and superlocked. Locking the 
vehicle from inside using the CDL switch puts the system into the locked state. Locking the vehicle from the outside 
using the driver's door lock or the remote handset puts the vehicle into the superlocked state.

When the vehicle is locked, the BCU:

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Energises the lock actuators in the side door latches to disengage the external door handles from the latches

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Energises the fuel filler flap actuator to extend the locking pin to secure the filler flap (all except NAS)

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Ignores inputs from upper tail door external release switch.

The BCU will lock the vehicle regardless of the position of the ignition switch and whether the key is in the ignition 
switch or not. The upper tail door internal release switch remains enabled and individual side doors can be unlocked 
using the internal door handle. From the locked state, the vehicle can be centrally unlocked using the CDL switch, the 
remote handset or the driver's door lock.

When the vehicle is superlocked, the BCU:

l

Energises the lock and the superlock actuators in the side door latches to disengage both the internal and the 
external door handles from the latches

l

Energises the fuel filler flap actuator to extend the locking pin to secure the filler flap

l

Ignores inputs from both the external and the internal release switches of the upper tail door

l

Ignores inputs from the CDL switch.

The BCU will only superlock the vehicle after the ignition key has been removed from the ignition switch and the 
driver's door has opened. From the superlocked state, the vehicle can be centrally unlocked using the remote handset 
or the driver's door lock.

Tail Door Opening
When the vehicle is locked or superlocked, operating the tail door release button on the remote handset causes the 
BCU to actuate the upper tail door release actuator while leaving the remainder of the system in the locked/
superlocked condition.

Volumetric protection is disabled when the taildoor is opened.

SPE
With the vehicle superlocked and SPE enabled, when the BCU receives a request from the remote handset or the 
driver's door lock it unlocks the driver's door and changes the rest of the system from the superlocked to the locked 
state. When it receives a second unlock request, from the remote handset, the driver's door lock or the CDL switch, 
the BCU unlocks the remainder of the system.

Automatic Locking
The BCU can be configured to automatically lock the system when the vehicle exceeds a set speed. The set speed 
is selectable between 2.5 and 17.5 mph (4 and 28 km/h) in 2.5 mph (4 km/h) increments.

To guard against accidental unlocking, the BCU can also be configured to automatically lock (not superlock) the 
system if no door switch, bonnet switch or CDL switch is activated within 2 minutes of unlocking the vehicle with the 
remote handset.

Automatic Unlocking
If a crash that triggers the airbags occurs, the SRS DCU outputs a crash signal to the BCU. On receipt of the crash 
signal the BCU outputs unlock signals to all the door latch actuators and the fuel filler flap actuator, irrespective of 
their current locked state. Subsequent attempts to lock the doors are inhibited until the BCU has received an unlock 
request.

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