2004 VW Passat TDI Remote unlock not working

I purchased this car on Nov 1 2010. Within three weeks, the remote door unlock (from the key has stopped working). I can still remote lock it. I can unlock/lock with the key. Could you possibly give me some insight in to whats going on, or possibly let me know if I could fix it myself?

Have you tried replacing the battery?

no I haven't but I dont see why that would make a difference since it still locks the car remotely and pops the trunk.

I suggest you first get a VCDS and scan the Comfort Control Module and see if it is coded right. Then if that doesn't work, change the battery or go to the dealer.

whats a vcds? is that the vag com?

X 2

Just had the same symptoms in DEC. Changed the remote battery....

KCMike said:

Have you tried replacing the battery?

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I agree, try the $2 fix first, and 9x out of 10 that will solve the remote problems. Same thing happened with mine.

LoneLIPumpeDuse said:

Just had the same symptoms in DEC. Changed the remote battery....

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Closer to $10.00 Those little batteries are expensive

Remote not unlocking

The exact same thing happened to me. I bought a CR 2032 battery at a local electronics component outlet store for $1.50, installed it and now it works fine. The dealer wanted $13.00 for the battery.

Not really. $2 at Menards / Fleet Farm.

Go to Wally world, and they get expensive.

CR2032 I believe

LoneLIPumpeDuse said:

Closer to $10.00 Those little batteries are expensive

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+1 on changing the battery.

When my battery got low the trunk unlock stopped working but the other buttons were fine.

besides, the range improves as well.

rolotomassi44 said:

whats a vcds? is that the vag com?

Click to expand...

Samething
vag com = old name
vcds = new name
http://www.ross-tech.com/
...been worth every penny

Hi, I know this is an old thread.

I just had a Polo TDI where the lock button worked, the boot button worked, but the unlock not. Scanned the comfort module, checked and reprogrammed the keys, no luck.

Then I put a new battery in, no luck.

Then I shorted the + and - battery terminals on the pcb inside the keyfob (battery removed please!), put the old battery in, and it worked. Same for the second remote. Happy client! After he had a frustrating and potentially expensive trip to the dealers - they wanted to sell him new keys - okay, it probably would have solved the issue too...

I suspect a latched-up condition occured inside both keyfobs.

What did you use to short it out?

Whatever u use to short it make sure it is just a straight wire

Whatever u use to short it(probaly a straight copper wire) make sure it is just a straight wire, Recently made a bone head mistake resetting a mainboard with wire in a twist from positive to negative(was just trying to get the terminals onto the tiny solders reliably from a distance), freq'ed the chip out and smoked it!

Lol I know this is an old post but it helped with my 2004 Jetta TDI. Remote stopped unlocking. All other functions were fine. I shorted the + and - terminals on the pcb (circuit board) inside the keyfob with a small knife (doesn't matter as long as it is conductive) and viola! Worked like a charm. Thanks again!

johnboy00 said:

+1 on changing the battery.

When my battery got low the trunk unlock stopped working but the other buttons were fine.

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Had another low battery a few weeks ago. This time the trunk worked but I couldn't unlock the door. All is fine again.