Question about 2000 Toyota Sienna

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The immobolizer system does not recognize the key and will not allow the car to start. We are trying a new coding key to see that will fix it. If not they want to replace the computer. How much should this cost?

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Wow wow, try with a Toyota dealer,,, good luck.

Posted on Jul 29, 2010

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Installed new keylock cylinder with two keys attached. System says car has no key coded to it. Cannot make system recognize new keys. Locksmith tried with no luck


Hold your old key together with your new key and start the car. After a few seconds turn it off, remove the old key and restart it. If it starts, the car would recognize your new key.

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Problems starting car with car key, not recognizing key. Key light blinks then when it disappears car starts on second try. door/lock button tries to start car in steering column.


The key codes work in sequence. Each time you press a button on the key, it generates a new code. The car knows what code is next, and the few that come after.
If you accidentally press the button when the key is out of range of the car, the code the key sends isn't recognized by the car as "current". The next time you press it, the car does recognize it, as it's re-synchronized.
It's possible that the battery in the key is getting weak, and that is simply time-related. Car batteries have a similar lifetime. I'm a little surprised that your alternator went out, too, but that does happen.

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Can a 02 jeep grand Cherokee work with out a sentry immobilizer system


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1 Answer

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Sounds like an incomplete configuration procedure. Did you do this yourself or did you have the dealer do it? There may be a difference between configuring the wireless fob and allowing the vehicle to learn the new transponder to overcome the immobolizer.

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MY 2003 DODGE DAKOTA SECURITY LIGH STAYS ON


Maybe this will help:
From the owners manual:

SENTRY KEY IMMOBILIZER - IF EQUIPPED
With this system, an electronically coded ignition key
sends a signal to the vehicle electronics. If the electronics
recognizes the signal, the vehicle will start and continue
to run. If the system does not recognize the signal, the
vehicle will start and run for 2 seconds, then shut off.

After six unsuccessful attempts at starting, the system
will shut down until the correct key is used.

That's exactly what happened when I cut a new key and tried to start the truck without programming the key. So it looks like your truck is not recognizing the key.
If you have another key, try that one.

Or, try and disconnect the battery for a while, that clears up a lot of electrical problems.

GL,
Td

Mar 14, 2014 | Dodge Cars & Trucks

1 Answer

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Try your spare key, or have a new key made & programmed.

Aug 29, 2012 | Cars & Trucks

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1997 bmw 318ti starts and then wont start


New ignition switch.Do you have a immobolizer? (EWS 11).The coil end of the antenna could be shorted out.Or the transponder in you key could be defective.Check to see if you have a key fault message.Hopefully its just a starter.

Mar 15, 2012 | BMW Cars & Trucks

1 Answer

Just replaced the battery with a new purchased-at-dealer Honda OEM battery. The car starts right and within 2-3 seconds it shuts off with the "key" light flashing for the theft deterrent system....


SYSTEM ARMS AFTER SWITCHING IGNITION OFF, SWITCH IGNITION ON, IMMOBOLIZER WARNING LAMP ILLUMINATES FOR A FEW SECONDS,IF IMMOBOLIZER WARNING LAMP ILLUMINATES FOR A FEW SECONDS THEN FLASHES RAPIDLY,KEY CODE NOT RECOGNIZED, REMOVE KEY AND TRY AGAIN,IF THIS PROCEDURE FAILS.THE DEALERSHIP WILL HAVE TO REPROGRAM KEYS AND THE IMMOBOLIZER.

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sound like problem is in the security anti theft system.your car keys are worn or ignition switch. the bcm and pcm dont recognize keys this will disable car from cranking.this is a dealership fix.

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1 Answer

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You have a problem with the key or the wireless control/anti theft system. Take to dealer to confirm which.

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