2016 Toyota Highlander smart system is adopting 8A(also called H) chip, for all key lost, we can’t manual reset smart box as we have tested to reset EEPROM chip 93C66, but it didn’t work. Maybe the key data is in CPU, not EEPROM. We also can’t program all key lost by MINI900. So we have to do below:
Step 1: replace new smart box. The smart box No. is 89990-0E0100, have to replace the new one with same No.
Step 2: replace new steering lock. This car model has no immo box, have integrated immo data to steering lock, so we have to replace a new steering lock with same No. as old one.
Step 3: add the key. After replacing new smart box and steering lock, connect universal key programmer like X300 Pro to learn the key, at last do the synchronization. Finish.
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