INSTRUCTIONS FOR PROGRAMMING KEYS INTO RE-FLASHED TOYOTA / LEXUS ECM

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Filed Under (Toyota Manuals) by admin on 23-06-2011

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After we re-flash the ECM it will be in “Automatic Registration Mode” when you install it. The ECM is
expecting that when first powered up (by turning on a key) that it will encounter 3 new keys. The first two keys
are internally (inside the ECM) designated as MASTER keys and the 3rd key inserted will be internally
designated as the VALET key. The ECM can be programmed with as few as 1 key. If less than 3 keys are
programmed into the ECM the security light may flash for some time (hours to weeks) until the ECM “learns”
that it is apparently not going to get any more keys.

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