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Home >> Lexus >> 2016 >> NX 200t Base, FWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> DTC C1A4A: Skid Control Buzzer Circuit [09/2017 - 05/2019] >> Description
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DTC C1A4A: Skid Control Buzzer Circuit [09/2017 - 05/2019]: Description

The driving support ECU assembly operates the pre-collision warning by sending a buzzer request signal to the skid control buzzer.

If the driving support ECU assembly detects a malfunction in the skid control buzzer circuit, it will store DTC C1A4A.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A4A Skid Control Buzzer Circuit When the engine switch is on (IG) and the pre-collision warning is operating, either of the following conditions is met:
  • A buzzer request signal is sent to the skid control buzzer but the buzzer does not sound for 1 second or more.
  • A buzzer request signal is not sent to the skid control buzzer but the buzzer sounds for 1 second or more.
  • Skid control buzzer
  • Driving support ECU assembly
  • Harness or connector