2002 Sienna Keyless Entry, Power Door Locks, and Dome Lights won't work. - Toyota Nation Forum : Toyota Car and Truck Forums


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Old 07-29-2008, 09:24 AM   #1 (permalink)
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2002 Sienna Keyless Entry, Power Door Locks, and Dome Lights won't work.

All of a sudden the Keyless Entry, Power Door Locks, and Dome Lights on my 2002 Sienna won't work. I have checked EVERY fuse both under the dash and under the hood and all look good. My daytime running lights, power sliding door and power mirrors all work fine. Is there a control module or something that controls those three things that could have gone bad?

Thanks
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Old 07-30-2008, 02:04 PM   #2 (permalink)
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The same thing just happened to our 2004 Sienna.

The fuse under the hood was blown for our dome lights, so I replaced it and then I could immediately smell a hot electrical odor coming from under the dash. I pulled the fuse out and then today we noticed that the key fobs would no longer lock\unlock the doors. Plus, now the light on the dash is illuminated showing that a door is ajar.
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Old 08-05-2008, 06:02 PM   #3 (permalink)
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Quote:
Originally Posted by Sytec View Post
All of a sudden the Keyless Entry, Power Door Locks, and Dome Lights on my 2002 Sienna won't work. I have checked EVERY fuse both under the dash and under the hood and all look good. My daytime running lights, power sliding door and power mirrors all work fine. Is there a control module or something that controls those three things that could have gone bad?

Thanks
Look for a 25A fuse labeled 'door', it looks like it encompasses all the items you mentioned. These mini fuses can look deceptively good, I've been tricked quite a few times with a cursory inspection. The only way to check a fuse for sure is to test continuity with a meter.
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Old 09-27-2008, 04:39 PM   #4 (permalink)
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did you get your van fixed my has done the same thing
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Old 09-27-2008, 04:40 PM   #5 (permalink)
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I also have had the same problem with the power door locks changed the fuse as you said no luck is thier another way to check or replace fuse? thanks
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Old 09-28-2008, 12:52 PM   #6 (permalink)
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Unfortunately, no. I have just been living with it since there is nothing critical broken. I you find out anything, please let me know.

Thanks,

Pat
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Old 09-28-2008, 12:55 PM   #7 (permalink)
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Quote:
Originally Posted by Qslim View Post
Look for a 25A fuse labeled 'door', it looks like it encompasses all the items you mentioned. These mini fuses can look deceptively good, I've been tricked quite a few times with a cursory inspection. The only way to check a fuse for sure is to test continuity with a meter.
Qslim,

Thanks to your reply to my post. Sorry that it has taken me so long to do so. I am 99.99% sure that it is not the actual fuse as I have replaced it multiple times with multiple brand new fuses (all of which work in other locations).

Thanks again,

Pat
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Old 09-28-2008, 04:20 PM   #8 (permalink)
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Racingoklahoma,

No, none of these ideas fixed our van. The local Toyota dealer replaced the ECM the other day and everything works fine again. However, it did take countless hours of troubleshooting b4 Toyota figured it out. This really surprised me.
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Old 09-29-2008, 08:02 PM   #9 (permalink)
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Quote:
Originally Posted by Krichau View Post
Racingoklahoma,

No, none of these ideas fixed our van. The local Toyota dealer replaced the ECM the other day and everything works fine again. However, it did take countless hours of troubleshooting b4 Toyota figured it out. This really surprised me.
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Old 09-29-2008, 08:05 PM   #10 (permalink)
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I have pulled every fuse in the //// , replaced the door fuse with a new one with no luck. what was the cost ECU and is it behide the glove box? Thanks for all the Help.
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Old 09-29-2008, 10:34 PM   #11 (permalink)
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Quote:
Originally Posted by Sytec View Post
Qslim,

Thanks to your reply to my post. Sorry that it has taken me so long to do so. I am 99.99% sure that it is not the actual fuse as I have replaced it multiple times with multiple brand new fuses (all of which work in other locations).

Thanks again,

Pat
Well, that's a shame. Have you taken it to a dealer or another qualified tech with access to toyota's info? Electrical problems can be hard to diagnose, and even harder over the internet.
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Old 09-30-2008, 06:19 AM   #12 (permalink)
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Racingoklahoma,

I really don't know where this particular ECM is located.

I ended up with about $500 in our ECM replacement. The ECM was about $250 and the rest was labor.

Sorry that I don't have the specifics, but hopefully this helps.
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Old 10-02-2008, 07:30 PM   #13 (permalink)
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Quote:
Originally Posted by Krichau View Post
Racingoklahoma,

I really don't know where this particular ECM is located.

I ended up with about $500 in our ECM replacement. The ECM was about $250 and the rest was labor.

Sorry that I don't have the specifics, but hopefully this helps.
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Old 10-02-2008, 07:31 PM   #14 (permalink)
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Thanks again for the help. I will try and find where it is check the number there have been afew on ebay for 120.00 or so, thanks Bill
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Old 01-23-2009, 01:04 PM   #15 (permalink)
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I have finally fixed my problem thanks to information from another thread listed below:

door locks and interior lights don't work

As a review, all of a sudden the Keyless Entry, Power Door Locks, Dome Lights and all courtesy lights on my 2002 Sienna would not work. I solved the problem by replacing the COMPUTER, MULTIPLEX NETWORK BODY that it turns out controls all of these things. It is a gray 5.5"x2.5"x1.75" plastic box that is plugged into the the back (or top) of the fuse box that is located by the driver's left knee. You have to take the lower bezel of the dash off to get to it. Door threshold has also to be un-clipped, I also took the hood popping handle off, around 6-7 screws in total, it takes about 30 min to take the relay off and put it back again and close everything off.
On the box I found these following numbers imprinted on it:

COMPUTER, MULTIPLEX
NETWORK BODY
TOYOTA
89221-08010
241000-0190
Fujitsu Ten corp. of America USA

There is also a paper sticker on the back:

VRI0190C
010728A0063
ASSEMBLED IN USA

I found one used on Ebay for $75.00. The cheapest I could find a new one for was $328.00 at
http://www.toyotapart.com/product.asp?pID=136997&cID=1 .

I'm glad I got the used one because some of the information that I read suggested that a new one might have to be programmed.

Good Luck
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