Question about 2005 Renault 18I

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Renault central locking problem: door open sensor

As you can guess from the heading i have a renault with the dash telling me the door is open and which is preventing the central locking from operating.
It's a grand scenic - 2005ish (may not be the 181 I've had to enter it as, it's a 7 seat people carrier) - and i've had the door apart and if the electrics to the affected lock are disconnected the others work fine.
My semi-educated guess is there is a sensor in there that has failed open-circuit and one pair of the six wires that go to it are for this sensor and that shorting them together will fool the controller and allow the locking to work.
What I really need to know is which pair?
They are labelled A to F on the socket and there are coloured bands on three of the wires.
Any help on this will be greatly appreciated,
Many thanks, Hobbit

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  • the1hobbit Apr 07, 2009

    Cheers Terry5533, problem is that in this case there is no plunger type switch there, it's all incorperated into the lock mechanism that is mounted inside the door. Other than that an ideal solution for people with older style lock systems.

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Each Door switch works on the principle of OFF when the circuit is closed (the opposite to how a household light switch works, i.e OFF when the circuit is open). The door switch contacts become corroded with the passing of time and therefore don't make a closed circuit when the door(s) are closed consequently fooling the central locking system to believe that a door is open.

First thing to do is identify which door switch is not working or working intermittently. Open each door in turn and push the door switch in with your finger (located on the pillar of the body). If it's an intermittent fault then hold it there for 30 seconds wiggling the button switch slightly to establish a contact. If that doesn't identify the faulty switch then remove each one in turn and check with a meter for continuity - continuity will occur with the switch pushed in, if no continuity then you've found your faulty switch. You can repair these switches with a little patience, or pick-up a replacement from a scrapyard for less than a pound. Tip - before disconnecting the cable from the switch, tie a long piece of string onto the cable to prevent it from disappearing into the body of the car.

Posted on Apr 07, 2009

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I have the same problem and have only got as far as you. Do you know which of the 6 wires relate to the door sensor?! I know this is an old post but here's hoping!

Posted on Apr 29, 2016

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