Some Toyota models have a "SET" or "TPMS RESET" button, which is located below the steering wheel or under the glovebox. When the button is pressed, the system tries to locate the sensor ID's that are already stored. The "SET button" can be used when performing a tire rotation that has different tire pressures in the front and rear, changing or adjusting the tire pressure, or changing tire size, or when tires are replaced. [Toyota reset button - Sienna] If the "SET" button is pushed after new sensor IDs are introduced and before a relearn is performed, the ECU must be unlocked in order for the relearn procedure to work correctly. Some advanced TPMS scan tools (ATEQ's VT56, VT46 brands) have the capability to unlock the ECU. If your TPMS scan tool has the "UNLOCK ECU" option, the relearn procedure can be properly performed. Again, you must use the "UNLOCK ECU" option in order to properly turn the TPMS light off. [Toyota reset button]

Sheila Stevens
Marketing Representative
ATEQ TPMS Tools
Livonia, Michigan, USA

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