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Toyota Sienna Deactivating Laser Cruise Control

8 messages,  Last post on Mar 08, 2009 at 9:49 PM

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#1 of 8 Deactivating Laser Cruise Control by ploobers Feb 25, 2009 (4:14 pm)
I'm starting a 20,000 mile road trip in my 2006 Sienna, but I have an issue with my cruise control. After an accident, it gives me an E3 error anytime that I try to activate the cruise control. Reading here and on other websites, it seems like that is telling me that the laser adjustment system needs to be replaced / recalibrated. I don't have $2000 to spend on that.   The thing is that I've lived my whole life without having a computer automatically slow down my car, and I can live without it now. Is there a way to unhook or deactivate the "smart" laser system and just have my cruise control function in "dumb" mode where it just maintains a speed?   If not, what is the best route to get an aftermarket cruise control installed? I called a lot of local repair shops and they all told me to go talk to the dealer. Replies to this message: g3guy (Feb 25, 2009 8:33 pm) hause7 (Feb 25, 2009 11:27 pm)
#2 of 8 Re: Deactivating Laser Cruise Control [ploobers] by g3guy Feb 25, 2009 (8:33 pm)
Replying to: ploobers (Feb 25, 2009 4:14 pm) The thing has to be on a fuse somewhere. Get the dealer or someone from a good auto parts store to look at your owner's manual to find it and pull it, then see what you have lost. If you're lucky, you'll only lose the laser; if not there may be some other things that are also deactivated, but you can decide if you can live without them. Good luck....
#3 of 8 Re: Deactivating Laser Cruise Control [ploobers] by hause7 Feb 25, 2009 (11:27 pm)
Replying to: ploobers (Feb 25, 2009 4:14 pm) We had an 04 Sienna with the laser cruise and if I remember correctly if you pull the stalk towards you for a few seconds(it says mode on the stalk) it alternate between normal and laser cruise. You can use either one, you don't have to use laser cruise.
#4 of 8 by ploobers Feb 26, 2009 (9:11 am)
g3guy - I found a schematic online of the electronics. Would you know which fuse I should pull, or which other features might be deactivated? http://econtent.autozone.com:24991/znetrgs/repair_guide_content/en_us/images//09- 00c152/80/19/7c/5f//large/0900c15280197c5f.gif
#5 of 8 by ploobers Feb 26, 2009 (9:12 am)
hause7 - I tried that and it doesn't seem to work. Maybe I wasn't holding it long enough, so I'll try again.
#6 of 8 by ploobers Feb 27, 2009 (12:05 am)
Nope. I tried holding it down for up to 10 seconds and it didn't make any difference.
#7 of 8 by ploobers Mar 08, 2009 (9:49 pm)
I finally figured it out. When I go to turn on the cruise control while I'm driving, it tries to communicate with the laser and throws the whole cruise control into lockdown. If I turn it on while I'm stopped, or even while I'm going really slowly, and then change it to normal mode like has been suggested, I can use it just fine. It's not a perfect solution, but not a bad one. It just means that half the time when I get on the freeway, I have to pull over and stop so that I can activate the cruise control before starting again.   Thanks for all of your help and suggestions!

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