Keyless Entry: Description and Operation

Central Locking System

DESCRIPTION

Introduction
Operation of the Central Locking System (CLS) is controlled by the Central Junction Box (CJB). The CLS allows the doors, and where applicable, the fuel filler door, to be centrally locked and unlocked using the remote handset, the CLS switches, or the door lock.

The CLS has three locking states:
^ Internally locked
^ Externally locked
^ Superlocked.

Configurable CLS features include automatic speed locking, automatic relocking and Single Point Entry (SPE). All vehicles incorporate crash locking.

NOTE: The door key lock switch is always fitted in the LH front door, irrespective if the vehicle being LHD or RHD.

OPERATION

Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 11E and fusible link 17E (C0632) on an R wire. Both are located in the Battery Junction Box (BJB). Fusible link 17E (C0570) provides a constant battery feed to fuse 12P, fuse 49P, and the Central Junction Box (CJB) (C0583) on an NR wire:

Fuse 49P provides a constant battery feed to the 6 CLS relays and the lower tailgate Field Effect Transistor (FET), which are all located within the CJB. Fuse 12P provides a constant battery feed to the horn relay.

Fusible link 11E (C0570) is connected to the ignition switch (C0028) by an N wire. When the key is placed in the ignition switch, current flows across the switch (C0028) to the CJB via fuse 40P (C0582) on an LGW wire. When the ignition switch is in the 'auxiliary' position, current flows across the switch (C0028) to the CJB (C0582) on a W wire. When the ignition switch is in the 'ignition' position, current flows across the switch (C0028) to the CJB (C0582) on a Y wire. When the ignition switch is in the 'crank' position, current flows across the switch (C0028) to the CJB via fuse 60P (C0582) on a WR wire.

The CJB (C0585) is provided a ground path on a B wire.

RF Receiver
The RF receiver converts signals from the remote handset into digital messages and transmits them to the CJB. The RF receiver (C0049) is provided a constant feed from fuse 43P (C0585) on a GW wire. Fuse 43P is located in the CJB. The RF receiver transmits messages to the CJB (C0586) on a U wire.

CLS Door Motors
The CJB controls operation of the CLS motors as follows:

Drivers Door
If a lock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the lock motor (C1449) on a BR wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If a superlock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the superlock motor (C1449) on a BP wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If an unlock request is made, the CJB energises the CLS return relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to both the lock and superlock motors (C1449) on a BG wire. Current flows through the motor windings and back to the CJB on BR and BP wires respectively. A ground path for the motors is provided via the de-energised CLS relays on a B wire.

Passenger Door
If a lock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the lock motor (C1451) on a BR wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If a superlock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the superlock motor (C1451) on a BP wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If an unlock request is made, the CJB energises the CLS return relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to both the lock and superlock motors (C1451) on a BG wire. Current flows through the motor windings and back to the CJB on BR and BP wires respectively. A ground path for the motors is provided via the de-energised CLS relays on a B wire.

RH Rear Door
If a lock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the lock motor (C0442) on a BR wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If a superlock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the superlock motor (C0442) on a BP wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If an unlock request is made, the CJB energises the CLS return relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to both the lock and superlock motors (C0442) on a BG wire. Current flows through the motor windings and back to the CJB on BR and BP wires respectively. A ground path for the motors is provided via the de-energised CLS relays on a B wire.

LH Rear Door
If a lock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the lock motor (C0442) on a BR wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If a superlock request is made, the CJB energises the CLS relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to the superlock motor (C0442) on a BP wire. Current flows through the motor windings and back to the CJB (C0585) on a BG wire. A ground path for the motor is provided via the de-energised CLS return relay on a B wire.

If an unlock request is made, the CJB energises the CLS return relay by providing a ground path for the relay coil. The relay (C0585) is now able to provide a feed to both the lock and superlock motors (C0442) on a BG wire. Current flows through the motor windings and back to the CJB on BR and BP wires respectively. A ground path for the motors is provided via the de-energised CLS relays on a B wire.

CLS Tailgate Motors

Upper
The upper tailgate motor is located in the upper edge of the lower tailgate. When an open request is received, the CJB (C0586) provides a feed to the motor (C0383) on a BP wire. This feed energises an actuator, which retracts and pulls a cable to release the upper tailgate. The CJB then removes the feed to the motor and the actuator returns to its normal (extended) position. The motor is provided a ground path on a B wire.

The CJB monitors the condition of the upper tailgate via the upper tailgate ajar switch. The CJB provides a reference feed to the switch (C0616) on a BR wire. When the tailgate is opened the switch contacts close and a ground path is created on a B wire.

Lower
The lower tailgate motors are located in either end of the lower tailgate. When an open request is received, the tailgate FET (C0585) provides a feed to the LH (C2052) and RH (C0617) motors on a BP wire. This feed energises an actuator in each motor, which then extend to release the latches. The CJB then removes the feed to the motors and the actuators return to their normal (retracted) position. The motors are provided ground paths via B wires.

CLS Fuel Filler Door Motor
When a lock request is received, the CJB energises the fuel filler door lock relay by providing an earth path for the relay coil. The energised relay (C0582) provides a feed to the fuel filler door motor (C0748) on a KR wire. An earth path is provided via the de-energised un-lock relay on a KP wire. This energises an actuator which extends to lock the fuel filler door.

When an unlock request is received, the CJB energises the fuel filler door un-lock relay by providing an earth path for the relay coil. The energised relay (C0582) provides a feed to the fuel filler door motor (C0748) on a KP wire. An earth path is provided via the de-energised lock relay on a KR wire. This de-energises the actuator which retracts to release the fuel filler door.