I'm trying to restore/repair the central locking on a friends Felicia 1.9 diesel.

 

Fuse 16 is blue /15 amp and looks good (I have also tried 2 other 15A fuses).

I have looked at the various connectors in both footwells (behind the kick panels), they look good and are clean. There is no water present and no sign of any water damage or corrosion.

I have found the connector above the radio and it also looks good, but I have not looked at it closely as it is difficult to reach. I have also found the black box behind the speedometer and the PCB and components look healthy.

 

Currently the central locking does not work. I have tried using the key in both front doors and lifting/depressing the door lock knobs. The relay in the black box does not click.

 

Using my trusty multi-meter what can I check for?  I need to take the speedo out again as I have managed to disconnect the side-lights are on warning light 

 

Can I connect the black box pins x and y together and trigger the solenoids to do something, but which pins?

 

Thank you

I had a lazy solenoid on the passenger door and if it lagged enough to leave the door unlocked when locking the others then the next time I unlocked it the central locking didn't work (and likewise in reverse if it lagged on unlock).

If one door lock becomes out of sync with the others the whole system seems to stop and the lock/unlock only work on the door you are using at the time. To bring them back into line I used to get in the car, lock all doors on their own button and then they'd all unlock together again fine.

 

I think what I'm trying to say is it may be a fault localised to one door.

On the plug near radio there is a black and a yellow wire ones unlock ones lock just put wire one and touch a earth. Should bypass the front door micro switchs

I'm having the same problem I swapped the control unit behind the clock and still no joy what else could it be?

AndrewYoung

If you want to be successful in your diagnosis, you need to do a systematic approach, you need a schematic, and you need to understand how central locking works on Felicia.

 

Let's start with the schematic. Skoda used 4 (four) schematics for central locking (CL) depending on year of fabrication as follows:

 

94.09 - 95.03

95.04 - 97.05

97.06 - 97.12

98.01 on

 

Tell me exactly the year / month of fabrication and I will post the schematic. Having the schematic handy will make diagnosis very easy. If you are not interested in schematic and you want to jump directly to tests, you need to check 2 things: if you have ground and if you have 12V to CL control unit (CLCU)

Mine is 1997 registered in October that year

Central locking schematic (97.06 - 97.12)

 

Start by checking if you get +12V at pin 7 (red wire) of connector T10g and ground at pin 5 (brown wire) of the same connector.

Edited 17 April, 201511 yr by RicardoM

I had this with my last felicia drivers door would lock all doors but not work as cl it turned out the motor side went but switch side not to test motors use the brown and blue wires if they all work then it will probably be the switch side in them to test control relay use the yellow and black wires that follow to the account plug around radio area pm me if needed for more details...

pm me if needed for more details...

Why do you need this topic to be private? Don't you want people with similar issue learn publicly from your knowledge? Imagine what would be this forum if questions would be answered in private...

 

By the way, his problem is different from yours. He said nothing works. That is why I provided a schematic and advised to start checking the basics first: +12V and GND at control unit's connector (T10g/7 and T10g/5 respectively). The rest will follow.

Edited 18 April, 201511 yr by RicardoM

Hopefully have a play with it today and find something out o have swapped out all locks 1 by 1 and still nothing so I'm lost

Parts changing without having first the evidence of fault is not a diagnosis You need a multimeter to probe in critical points then act accordingly.