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    1. · Registered
      2012 Sedona LX
      Joined
      ·
      2 Posts
      Discussion Starter · #1 ·
      I recently bought a 2012 Sedona that came with one key fob, and that fob worked only intermittently. The battery in the fob checked out good, so it's likely a problem with the circuitry in the fob or the receiver wired in the vehicle. I also wanted a second fob and found that you can't DIY the programming like with other vehicles, so adding a fob was going to be expensive.

      So I decided to go the route of installing my own "universal" keyless entry system. I chose this one from Amazon, which came with these instructions, and I set out to wire everything up using option C, negative triggering.

      I used this wiring description to find the orange and red lock and unlock wires inside the driver's door panel. I found a green wire providing constant 12V power inside the door panel and used a bolt for ground. I was rocking and rolling.

      Got everything wired up, and it worked great ... almost. The lock button works. A double press on the unlock button unlocks all the doors except the driver's door. But a single press on the unlock button ... does nothing. :(

      So I can do everything with the fob except unlock the driver's door.

      I see in 2014 and 2015 two other people reported the same issue on this forum. I did find the pink wire referenced and tested it with a multimeter, finding a 12V going across it only when the unlock button on the driver's door is pressed. So that pink wire sure seems promising, but I tried connecting it per the negative triggering diagram and couldn't get it to do anything with the fob.

      Has anyone figured this out?

      And if not, I'm thinking my best bet is to replace the Kia actuator with a standard two-wire negative-trigger actuator like this one from Amazon. Does that seem like the right next step? Seems like it would definitely be compatible with the universal keyless entry system. But is something else going to stop working if I take out the Kia actuator?

      I'd really appreciate any help with this! Thanks in advance!
       
    2. · Registered
      2009 Kia Sedona LX 3.3L V6 AWD
      Joined
      ·
      50 Posts
      I recently bought a 2012 Sedona that came with one key fob, and that fob worked only intermittently. The battery in the fob checked out good, so it's likely a problem with the circuitry in the fob or the receiver wired in the vehicle. I also wanted a second fob and found that you can't DIY the programming like with other vehicles, so adding a fob was going to be expensive.

      So I decided to go the route of installing my own "universal" keyless entry system. I chose this one from Amazon, which came with these instructions, and I set out to wire everything up using option C, negative triggering.

      I used this wiring description to find the orange and red lock and unlock wires inside the driver's door panel. I found a green wire providing constant 12V power inside the door panel and used a bolt for ground. I was rocking and rolling.

      Got everything wired up, and it worked great ... almost. The lock button works. A double press on the unlock button unlocks all the doors except the driver's door. But a single press on the unlock button ... does nothing. :(

      So I can do everything with the fob except unlock the driver's door.

      I see in 2014 and 2015 two other people reported the same issue on this forum. I did find the pink wire referenced and tested it with a multimeter, finding a 12V going across it only when the unlock button on the driver's door is pressed. So that pink wire sure seems promising, but I tried connecting it per the negative triggering diagram and couldn't get it to do anything with the fob.

      Has anyone figured this out?

      And if not, I'm thinking my best bet is to replace the Kia actuator with a standard two-wire negative-trigger actuator like this one from Amazon. Does that seem like the right next step? Seems like it would definitely be compatible with the universal keyless entry system. But is something else going to stop working if I take out the Kia actuator?

      I'd really appreciate any help with this! Thanks in advance!
      It sure sounds like your new system is sending a double pulse as that's what is required to unlock the other doors. I know the wiring diagram I have says a double plus is required for all doors. It would be strange if a double pulse didn't also unlock the driver's door but I've seen much stranger things in my 43 years of electronics, and those Koreans, and Asian manufacturers in general, don't bother to go by anything US unless the law requires it.

      Although rereading your post you say you press unlock once and get nothing. Certainly a strange problem. Maybe the pulse is too short? Not very likely though.
       
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