The central locking pump will not operate the 1999 polo

lock with the key and the alarm shouldnt operate ,suspect a fault with the key remote but cannot say for sure

I'm not sure what country you are in but the Mk4 VW POLO (2002-2009) is shown as having remote central locking. Check with your local VAG dealer
Hope this helps

i would start by checking the switch on that door. it sounds like the switch on the lock asm. my be getting stuck.

Synchronization
When
Key buttons operated repeatedly while vehicle out of range and system becomes inoperative.
How
Polo: Press key unlock button for approximately 1 second. Golf/Bora: Press key lock or unlock button for approximately 1 second. Manually lock or unlock vehicle. System should now lock or unlock vehicle. If not, carry out programming procedure.
Programming
When
Key added or replaced. System malfunction.
How - Polo
Keys can only be programmed using diagnostic equipment.
NOTE: A maximum of 4 keys can be programmed.
How - Golf/Bora
98MY
Keys can only be programmed using diagnostic equipment.
NOTE: A maximum of 4 keys can be programmed.
How - Golf/Bora 99MY


Switch ignition ON. Insert key to be programmed into driver's door lock. Lock vehicle manually. Press lock or unlock button. Wait at least 1 second. Press lock or unlock button again. Vehicle horn sounds to indicate correct programming. Keys can also be programmed using diagnostic equipment.
NOTE: A maximum of 4 keys can be programmed.

i would check the door lock actuators and also make sure you have a good battery. have your battery tested vw have a lot of electrical issues due to battery problems.

I assume you mean that the central locking system will not lock the doors but you can do so manually.

Get inside the vehicle and close all doors.

On each rear door, lock and unlock the mechanism manually a couple of times. In other words do not use the key pad.

Then leave both rear doors in the locked position (manual locking) and operate the lock button on you key pad to operate the central locking system. Wait a few seconds then hit unlock on your key pad and a few seconds later hit lock on your key pad.

If the system fails to lock your rear doors you will need to get the vehicle to an auto electrician to check out the issue and rectify it for you. There are a number of possible causes which cannot be identified without physically checking the system. So you will need to have this rectified by a professional.

I assume you mean that the central locking system will not lock the doors but you can do so manually.

Get inside the vehicle and close all doors.

On each rear door, lock and unlock the mechanism manually a couple of times. In other words do not use the key pad.

Then leave both rear doors in the locked position (manual locking) and operate the lock button on you key pad to operate the central locking system. Wait a few seconds then hit unlock on your key pad and a few seconds later hit lock on your key pad.

If the system fails to lock your rear doors you will need to get the vehicle to an auto electrician to check out the issue and rectify it for you. There are a number of possible causes which cannot be identified without physically checking the system. So you will need to have this rectified by a professional.

the pump was probably ok you need to check the vacuum lines that go to the doors and also the ones leaving the pump you will find a leak in one them. look in the door jams inside the boot that is a common area for those to break.

it is more than likely the drivers door latch assembly

LEG CameraB (1989)
Bond 43 Opere