REAR DOOR LOCK

How are you trying to open the door , button on key fob ? With this system you can pull up on the drivers handle an it activates Antennas in the external side door handles (C30/C70 front doors, S40/V50 rear doors)

Antennas in the passenger compartment and cargo compartment

An antenna in the rear bumper

Quick lock motors in the lock units in the side doors

The remote keyless entry (RKE) receiver receives a signal from the key

The switch in the clutch pedal (manual transmissions) or a signal from the brake pedal switch via the central electronic module (CEM) (automatic transmissions)

Key-in switch.

Switch in door handle and lock button on handle .
If a door handle is pulled outward, a switch closes that wakes up the system and activates the antennas in the handles on the side where the handle has been pulled out. If a valid key is within a radius of approx. 1.5 metres from the handle, the relevant door will open and the vehicle will unlock one or several doors. Which doors are unlocked depends on the settings for the system. The vehicle can also be unlocked if the handle is affected on the tailgate.

Try this trick, push the lock button once your in the car to unlock first then lock then unlock again, your kill switch is activated as anyone could unlock the door with a key, but to be linked together via bluetooth remote is exclusive and good practice if you choose to stop a thief

Use the key fob to open the rear doors by pressing the unlock function twice. If you need reprogramming instructions, use the following:

2002 Focus

1. Turn the ignition from OFF to RUN 4 times within 6 seconds.
2. Turn the ignition OFF. The system will chime to confirm programming mode.
3. Within 20 seconds, press any button on first keyless remote. The system will chime once to confirm programming.
4. Within 20 seconds, press any button on second keyless remote. System will chime once to confirm programming.
5. Turn ignition to RUN to exit programming mode.

The problem is not the actuators, the fault lies in the central locking control unit under the dashboard, behind the glovebox, on the firewall. The CLCU is mounted with the connection terminals to the top resulting in condensation going onto the printed circuit board inside, if the damage started a while ago there is only 3 ways to go.

1. specialist firm to repair the CLCU.
2. Replace.
3. (As I did) buy a cheap remote control receiver with keyfob/s. Cut all wires off the multiplug, there are four pairs, a permanent live and permanent earth. Test each wire to earth on the van to identify the permanent earth FIRST. Then test pairs of wires across 12v/Earth noting which pairs actuate which lock.Isolate in pairs noting which wire has to be live to lock, (Reversed it will unlock) wire each pair into the relay on the remote receiver using the relay to changeover the polarity to each pair You will then be able to Lock/Unlock all the doors, throw the old CLCU away and mount the RCReceiver eslewhere to keep it dry. each door individually. I bought a 2 way RCReceiver and can lock/Unlock front doors seperate the the rear ones which is of far more use! Any decent electrician will tell you how to wire the relays. Job Done..... (100% Sure)

Troubleshooting is required to inspect few parts.It can be issue with ignition switch.Its not getting off.Or issue with sensor or wiring.Or its faulty lock itself.Click the link below and follow the troubleshooting:----Driver Door will not lock or unlock with Key or Remote? http://whatisbyme.blogspot.in/2012/05/1998-toyota-landcruiser-driver-door.html
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Driver side door will not lock or unlock with Remote? http://technoanswers.blogspot.in/2012/04/2009-toyota-tundra-driver-side-door.html
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Central locking not working ? http://schematicsdiagram.blogspot.in/2012/03/this-is-how-system-operates.html

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Remote will not unlock Rear door ?
http://schematicsdiagram.blogspot.com/2011/12/remote-will-not-unlock-rear-door-on-gmc.html

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Repairing car Door lock Actuator?
http://howtobyme.blogspot.com/2011/11/repairing-car-door-lock-actuator.html

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How to Access car door panel?
http://howtobyme.blogspot.com/2011/11/how-to-access-car-door-panel.html

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Vehicle door panel components?
http://howtobyme.blogspot.com/2011/11/vehicle-door-panel-components.html

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This will help.
Thanks.

turn key twice when opening, ie turn right. once drivers door will unlock, turn twice passengers doors will unlock, and locking is turn anti clock wise once will lock all doors, turn twice will set door dead locks.dead locks will stop openand lock internal button working and handle from opening door. the same actions can be applied to the remote one press drivers door, two press passenger doors, press and hold unlock button for 5 seconds and rear window will open.

re sync you fob. maybe a problem with door actuator also

suzuki swift central locking does not operate when using remote key fob

Its dirty, rusted or the rivets are coming loose. Open up clean and spray a little oil. If that does not help. Take a hammer and after removing the whole lock resecure the rivets with the hammer.
IT MAY ALSO BE THAT YOUR BATTERY IS NOT STRONG ENOUGH ANYMORE AND SHOULD BE CHECKED.

Happened to me after first purchasing my 850 - check the fuse for the CLS, as mine (for some reason) was too narrow, and was jostling about. Once I changed it out for a new fuse, no problems at all (I performed this fix a year ago, and no problems since).