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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 179 (Smart Key System (For Entry, HV) - Symptom Tests (3 Of 3)) >> SMART KEY SYSTEM (for Entry Function, HV Model) >> Entry Exterior Alarm and Answer-back Buzzer do not Sound [10/2023 - 11/2024] >> Description

Entry Exterior Alarm and Answer-back Buzzer do not Sound [10/2023 - 11/2024]: Description

WARNING: This page is about a different variant/trim than selected.

The smart key system (for Entry Function) uses the wireless door lock buzzer to perform various vehicle exterior warnings. When the conditions of each warning are met, the certification ECU (smart key ECU assembly) sends a buzzer activation request signal to the main body ECU (multiplex network body ECU) via CAN communication and the buzzer sounds.