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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 129 (Smart Key System (For Start, HV) - Symptom Tests (2 Of 2)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> Additional Key cannot be Registered [11/2023 - ] >> Description

Additional Key cannot be Registered [11/2023 - ]: Description

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If additional registration is not possible, a malfunction of the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), power switch, No. 1 indoor electrical key antenna assembly (front floor) or electrical key and tire pressure monitoring system receiver assembly is suspected.

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