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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 C1A50: Brake System [09/2014 - 10/2015] >> Description
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DTC C1A50: Brake System [09/2014 - 10/2015]: Description

During vehicle-to-vehicle distance control mode, when the actual vehicle speed exceeds the set vehicle speed, such as on a steep downhill slope, etc., the driving support ECU sends a brake control signal to the brake actuator assembly, and deceleration control is performed together with throttle valve control. When a malfunction occurs in the VSC system which is controlled by the brake actuator assembly, this DTC is stored.

DTC Code DTC Detection Condition Trouble Area
C1A50 When the radar cruise control system is operating, the input malfunction signal from the brake actuator assembly continues for 0.2 seconds or more.
  • Vehicle stability control system
  • Driving support ECU