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2005 Scion Tc keyless entry not working

I bought a 2005 scion tc about 3 months ago and my keyless entry worked! now the key lights up but its not locking or unlocking my car! and its not the battery. I have had 2 new batteries replaced in my keyless remote...

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  • maras_domain Dec 18, 2008

    its not an after market.... its the orignal key with the buttons built in- the guy i bought the car from says it needs be reprogrammed! but the all sites want you to pay, and i dont have money like that to pay for someone to tell me how to reprogram my car!

  • Anonymous Dec 20, 2008

    I am the original owner of a 2005 Scion tC and my car just started doing this yesterday. My original factory security system manual only has directions for passive arming on/off programming. :(

  • Guy May 11, 2010

    aftermarket or oem?


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  • 27 Answers

You can take the car to the dealer and he can reprogram the remote for you. Or you can buy the programming instructions for $9.95 from here:

You will need a working key to reprogram your remote.

Posted on Dec 19, 2008

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bad install, get a real mech (ASE) that knows how to modify cars
in this way.
id never do this, it hacks up the cars critical EFI systems.
i do know how to do it 100% perfect, but would not.!

congrats, you just broke a 100% perfect car. sorry for that....
the remote start ties into 3 critical areas ( at least)
1: starter key line.
2: the PRNL shifter wiring so you you dont run over kids,etc,
3: the EFI keyon, ECU activation wiring, (a really bad idea that)

you failed to do #3 correctly and can be real hard, if car
has any form of antithieft already installed.

how is that for a clue.? need more, ask.
the first error you did was not getting
an FSM or go to alldata dot com, and read how it works first.
then see if this hack job device has any hope at all working on this car. many dont.
on a 90s car or older this is far more easy.
this is a 2009... with antithief systems on board.

why non get in car and drive off and save all the excessive engine wear? as the op guide states.
the colder it is, and the longer the idle time , that is 90% of engine wear. my guess is you dont know that or could not care.

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I have a 2005 Honda Odyssey Touring. I bought it used last year, so I am not too familiar with the car alarm in it. The alarm was fine until my battery died a few months ago. After the car was jumped, the...

Ok, try this.
Put the key in the ignition, and turn forward
all the way just before cranking. Then within
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At this point, the only thing working would
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Just Repeat these steps to place it
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