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Home >> Lexus >> 2019 >> GS 350 Base, RWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> DTC C1A4A: Skid Control Buzzer Circuit [09/2014 - 10/2015] >> Description
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DTC C1A4A: Skid Control Buzzer Circuit [09/2014 - 10/2015]: Description

Based on pre-collision control, the driving support ECU informs to the driver to be careful. The driving support ECU performs this by sending a sounding signal to the skid control ECU to sound the skid control buzzer.

When the brake actuator assembly (skid control ECU) detects a malfunction in the skid control buzzer circuit, a malfunction signal is sent to the driving support ECU, and a DTC is output. Although the brake actuator assembly (skid control ECU) sends a malfunction signal to the driving support ECU, the ABS does not output a relevant malfunction detection DTC.

DTC Code DTC Detection Condition Trouble Area
C1A4A While the engine switch is on (IG), a skid control buzzer circuit malfunction signal is received from the brake actuator assembly (skid control ECU) for 3 seconds or more.
  • Skid control buzzer
  • Skid control buzzer circuit
  • Brake actuator assembly (skid control ECU)
  • Driving support ECU