DTC C1A4A: Skid Control Buzzer Circuit [08/2019 - 08/2021]: Description

The millimeter wave radar sensor assembly is connected to the forward recognition camera via CAN communication.

The millimeter wave radar sensor assembly operates the pre-collision alarm by sending a buzzer request signal to the pre-collision city buzzer.

If the millimeter wave radar sensor assembly detects a malfunction in the pre-collision city buzzer circuit, it stores DTC C1A4A.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A4A	Skid Control Buzzer Circuit	When the ignition switch is ON and the pre-collision alarm is operating, either of the following conditions is met: A buzzer request signal is sent to the pre-collision city buzzer but the buzzer does not sound for 1 second or more. A buzzer request signal is not sent to the pre-collision city buzzer but the buzzer sounds for 1 second or more.	Pre-collision city buzzer Forward recognition camera Millimeter wave radar sensor assembly Wire harness or connector