LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2017 >> Highlander LE Plus, AWD >> Repair and Diagnosis (Single Page) >> External Pages >> Different variant/trim >> Section 249 (Smart Key System (Entry Function) - Symptom Tests - (Hybrid)) >> SMART KEY SYSTEM (for Entry Function) >> Symptom Tests >> Entry Exterior Alarm and Answer-back Buzzer do not Sound [02/2014 - ] >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Entry Exterior Alarm and Answer-back Buzzer do not Sound [02/2014 - ]: 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.