3rd Party Keyless Entry DIY (Why Not?)

[Swhitcomb]

M535. The key fob will lock and unlock the car fine for about the 1st 30 seconds. Then when the alarm arms it won't do it anymore. However, when you press unlock, it does light the door lights and the dash lights. When you unlock it manually with the key and open the door the alarm goes off until you turn the ignition on.

[Swhitcomb]

That's the long list of codes my immobilizer is throwing. Durametric won't clear them so I have no idea which ones are still an issue, and I don't have access to durametric. I had my Indy shop pull the codes the last time they worked on it.

[Craig030774]

Originally Posted by Swhitcomb

That's the long list of codes my immobilizer is throwing. Durametric won't clear them so I have no idea which ones are still an issue, and I don't have access to durametric. I had my Indy shop pull the codes the last time they worked on it.

What sticks in my mind is that we both have the exact same issue and that we have to reverse polarity on the lock / unlock. If you sit in the car with and open all the doors do they lock as soon as you start the car mine does ( not sure if it's supposed to though )

[Swhitcomb]

Do you also have an M535?

[Craig030774]

Well that's 1 issue cleared locking doors when ignition on is a dealer option

[Swhitcomb]

Yes. Tomorrow I'll shoot a video and show you what alarm is doing.

[Swhitcomb]

I can confirm it is a VW part. It has a VW of France stamp right on it. I don't think it's a MK4 part though, they wouldn't have a window drop switch.

Also, my car does not lock when the ignition is turned on, but it does lock itself while being driven.

[particlewave]

I know I'm repeating myself, but it shouldn't be any different than locking and unlocking using the key in the door. If the key didn't work in the door after 30 seconds, that would cause some serious issues.

I wish one of you guys were closer to me so I could solve this thing once and for all.

[Swhitcomb]

Originally Posted by particlewave

I know I'm repeating myself, but it shouldn't be any different than locking and unlocking using the key in the door. If the key didn't work in the door after 30 seconds, that would cause some serious issues.

I wish one of you guys were closer to me so I could solve this thing once and for all.

That makes 2 of us.

[dblhelixsf]

Originally Posted by particlewave

I know I'm repeating myself, but it shouldn't be any different than locking and unlocking using the key in the door. If the key didn't work in the door after 30 seconds, that would cause some serious issues.

I wish one of you guys were closer to me so I could solve this thing once and for all.

Yep, definitely something to do with the fact that it's an M535.

I can unlock the driver door manually with the physical key but I have to put the key in the ignition within 10 seconds or the alarm goes off.

[Swhitcomb]

Mine does exactly the same thing.

[Smallblock454]

Originally Posted by dblhelixsf

Yep, definitely something to do with the fact that it's an M535.

I can unlock the driver door manually with the physical key but I have to put the key in the ignition within 10 seconds or the alarm goes off.

That is normal if you don't / can't use the keyfob to open the doors.

You have to turn the key in the doorlock to the right for approx. 10 secs and hold it there. Than turn the key left and the central locking system will open the car. Also the alarm system is deactivated.

You can try to resync the keys to get the original keyfobs to work again.

Regards, Markus

[particlewave]

Originally Posted by Smallblock454

That is normal if you don't / can't use the keyfob to open the doors.

You have to turn the key in the doorlock to the right for approx. 10 secs and hold it there. Than turn the key left and the central locking system will open the car. Also the alarm system is deactivated.

You can try to resync the keys to get the original keyfobs to work again.

Regards, Markus

Or you could just unlock normally and insert the key within 10 seconds...seems like this would be the easiest route in most cases.

[Smallblock454]

Originally Posted by particlewave

Or you could just unlock normally and insert the key within 10 seconds...seems like this would be the easiest route in most cases.

Difference is, that the alarm system is still activated, which leads to a lot of DTCs.

[dblhelixsf]

Originally Posted by particlewave

Or you could just unlock normally and insert the key within 10 seconds...seems like this would be the easiest route in most cases.

Thanks exactly what I have to do - unlocking with a physical key and inserting the key into the ignition within 10 seconds. Unfortunately, the remote doesn't unlock once the alarm arms. Only the interior lights light up.

None of the key resyncing procedures I've tried have worked...and I've tried all of them.

[particlewave]

Sean - do you still have that list of trouble codes?

[Swhitcomb]

I can pull them when I get home from work.

[particlewave]

I can see it now. The picture wasn't showing up last night.

I was going through the 2000 or so pages of the workshop manuals and thought I'd do some more checking. I doubt any light will be shed, though...and it looks like you have already looked in them.

[particlewave]

Blue/green/red (blue wire, green stripe, red bands) for lock and blue/yellow/red for unlock (the same wires lock/unlock the front and rear trunk levers on models with release levers vs buttons).

[Swhitcomb]

I ran into some money. I’m going to start trying to replace and diagnose this issue. I found a PDF of the original diagnosis chart. Complete with values and what to test. Car gets a new top on Thursday and when it comes back I’ll dig in. I suspect one or both of the lock mechanisms has failed. The diagnostic chart thankfully tells you how to tell. They’re 350-400 bucks.