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#1 |
![]() Drives: 2008 yaris 5door RS Join Date: Nov 2008
Location: Lunenberg County, Nova Scotia
Posts: 29
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Disable transponder?
Hello, I have a 2008 5 door RS, and the transponder / immobilizer is giving me grief. At random, it won't recognize the key, or fight with the Hyundai key on the same ring. It will turn over, start, and then die after 2 seconds. Try a different key, like the valet key, same thing. Take all other keys out of the car to eliminate interference from other chips, it will still do it until it decides to let me drive it. Turn key, fail, take key out, put it back in, fail... When I'm trying to leave for work sometimes it will take 20 - 30 attempts. It's aggravating to say the least, and I won't let my wife drive it right now, lest she get stranded at the mall.
I've searched and can't find anything on disabling or over riding the transponder. I don't need it, I live and work in the sticks, very low car theft area, and have also consulted the insurance company, and they said it didn't matter for a car of this age to turf the transponder. How do I remove / disable / bypass and still have the car play nice when the key is turned? |
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#2 |
![]() ![]() ![]() ![]() Drives: 2007 yaris 3 door Join Date: Sep 2015
Location: Denver, Colorado
Posts: 999
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you would have to change the ECU from a vehicle that is exactly the same as yours minus immoblizer.
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#3 |
![]() Drives: 2008 yaris 5door RS Join Date: Nov 2008
Location: Lunenberg County, Nova Scotia
Posts: 29
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There has to be a simpler way. How do you trick the immobilizer when you have a remote starter?
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#4 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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You use a transponder key bypass module, which either requires surrendering a key into a little box that gets hidden under the dash or programming the module by reading an existing key.
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#5 |
![]() Drives: 2008 yaris 5door RS Join Date: Nov 2008
Location: Lunenberg County, Nova Scotia
Posts: 29
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Do you think that could solve my problem, or do you think there are bigger issues in play?
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#6 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Do you have a second key, as that will tell you if the issue is the key or the transponder key amplifier?
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#7 | |
It's the illusion you see
Drives: 07 Yaris Sedan Aero Join Date: Oct 2006
Location: Brossard, QC
Posts: 3,888
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Quote:
Sent from my SM-G930W8 using Tapatalk |
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#8 |
![]() Drives: 2008 yaris 5door RS Join Date: Nov 2008
Location: Lunenberg County, Nova Scotia
Posts: 29
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#9 |
![]() Drives: 2008 yaris 5door RS Join Date: Nov 2008
Location: Lunenberg County, Nova Scotia
Posts: 29
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I have a dummy key I got cut just for the doors, and if you try to start the car with it, it will start but after a second or two it will die.
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#10 |
![]() Drives: 2008 yaris 5door RS Join Date: Nov 2008
Location: Lunenberg County, Nova Scotia
Posts: 29
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So other than find an Ecu without the transponder (doesn't exist), and maybe a bypass module would work, no ideas? I can't be the only one to experience this.
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#11 |
![]() ![]() ![]() ![]() ![]() ![]() Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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An ecu from an American yaris will work fine as they didn't have an immobilizer on them. You would have to put that ecu in and then disconnect the communication (wires) from the key transponder to the ecu and it would run fine,
Its not an issue I've ever heard of before. If the above is too much work for you then go get it diagnosed at the dealer and they should be able to let you know what is faulty and what needs replacing plus the cost The reason it isn't easy to by pass is because it is an anti theft device. If it was easy to by pass then it would defeat the purpose of it being there. Unfortunately this men's you have more of a headache to deal with now
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No one ever wants to give a Yaris the point by... ![]() Last edited by tmontague; 02-14-2017 at 08:02 PM. |
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#12 |
![]() ![]() Drives: 2015 yaris L Join Date: Jun 2016
Location: Indiana
Posts: 77
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More of a make money for dealers device than anything else.
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#13 |
![]() ![]() ![]() Drives: 07 5dr Join Date: Nov 2015
Location: YYC
Posts: 197
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In Canada the pre 2008 Yaris did not come with an immobilizer, so you could in theory swap in an 07 or 06 ecu and your key reading problems would go away. Since the 06 & 07 don't have an immobilizer than I would think there would be no need to reprogram the ecu to the car but I could be wrong here. Another possibility is that your car "forgot" the keys and they need to be reprogrammed to the car. Not sure if it's an issue with Toyota's but Honda's of that vintage it's a fairy common issue. A dealer level scan tool is needed to reprogram the keys so you need to take it to a independent shop, locksmith or the dealer. It could also be an issue with the receiver around the ignition or the wiring back to the ECU.
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