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Home >> Lexus >> 2019 >> GX 460 Base >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System (Diagnostic Codes & Circuit Tests) >> Pre-Collision System >> DTC C1A4A: Skid Control Buzzer Circuit [08/2015 - 08/2019] >> Description
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DTC C1A4A: Skid Control Buzzer Circuit [08/2015 - 08/2019]: Description

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

When the 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 stored. Although the skid control ECU sends a malfunction signal to the driving support ECU, the relevant ABS DTCs are not stored.

DTC Code DTC Detection Condition Trouble Area
C1A4A While the engine switch is on (IG), a skid control buzzer circuit malfunction signal is received by the skid control ECU for 1 second.
  • Skid control buzzer circuit
  • Master cylinder assembly (Skid control ECU)
  • Driving support ECU