Question about 2002 Toyota Sienna

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Power locks and keyless entry not working

Our 2002 Toyota Sienna door locks and keyless entry stopped working along with the dome lights. We checked all fuses and they were all fine. I have been looking around trying to figure out this problem and bought a repair manual but am not having a lot of luck. Someone told me that its probably a bad relay but I dont have a clue how to find it. Can anyone help?

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  • Anonymous Jan 19, 2009

    My power locks, keyless entry, internal lights, seat belt warning, key reminder are not working. I will appreciate any help I can get. Thanks

  • richierusso Feb 28, 2009

    Our 2002 Toyota Sienna door locks and keyless entry stopped working along with the dome lights. We checked all fuses and they were all fine.

  • mikegeep Apr 16, 2009

    on my 2002 Toyota Sienna, my door power door locks stopped working along with my dome, personal, vanity, door, courtesy, luggage, ignition switch lights etc (controlled by the 10 A Dome fuse) however the clock still worked. I changed the fuse and nothing changed. I also changed the 15A fuse in the engine compartment that had the "locking with wireless remote control" in it's list. I am guessing from the answers that were recently given, to look at the relay behind the lower instrument panel. Toyota Ed's reply questions that solution. Any other solutions or things I should check before I spring for the relay?


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Thanks for the help. I repalced the 10amp fuse that controls the dome lights and the wireless lock started working ..

Posted on Apr 01, 2009

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Hey , I had the same problem with my 1999 Sienna XLE. I fixed it by replacing the Integration Relay which clips right on the back of your fuse junction Inside the car, right next to your left knee, behind a dash cover. To swap one out takes about 20 mins. You need flat, philips head screw drivers and a 10 mm socket. Dealer price for the relay was $200, but found one in a junkyard for 50. I can send you pictures and more info if you want.

Posted on Oct 27, 2008

  • dramayrat Jan 17, 2011

    hey uzamca, i have the same problem with my 2002 toyota sienna. i checked the fuses and they are all fine. do you mind sendign me a picture and more infor on what you did to fix your problem? thanks!

  • uzamca Jan 17, 2011

    Dramayrat,
    Its been awhile since I fixed it, do not have the pictures anymore. But;
    All the regular fuses check out just fine because the problem lies with the "integration" RELAY, not the small regular see thru fuses. To get to the problem relay, you have to remove the lower dash skirt/cover which your left knee bumps against when you are sitting too close to the steering wheel.
    Remove the cover
    you will see bunch of wires going into a plastic box, the box is probably 4"x6"x2" may be. Mine was black with yellow smaller box attached to it. May be three different wire harnesses and a screw had to be detached from the box to get it out.
    So once you remove the box, you can remove the smaller one (yellow in my case) and replace it, you can inspect it for burnt/broken/chipped electronics. Sometimes you can clean or bend contacts.
    I had asked the dealer to print out the part picture, so I had a slight idea of what I was looking for. Also Toyota knows that this was a flaw in bunch of different models and makes.
    Let me know if I can help any other way, hope this helps.

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The domelight does not utilize a relay.
Did you check the 10 amp DOME fuse, under the dash? This controls both the dome and the wireless door lock ECU. There is an "integration relay" that runs the door locks, but, since you said that the dome light is inoperative, that is where I would start.

Posted on Oct 27, 2008

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Replacing blown 10A dome fuse also fixed my 2000 Sienna. The fuse is located in the engine compartment next to the air filter as said in the owner's manual.

Posted on Jun 23, 2013

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I replaced the Integration Relay (twice from junkyard parts), and the problem continued. Saw this post, ran out to the car and changed the 10A Dome fuse (didn't know there were fuses for the interior out under the hood - that doesn't make sense), and the problem was immediately fixed. Thanks for the help. I was about to drop $180 on a new Integration Relay.

Posted on Jan 30, 2015

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