Toyota Yaris: Pre-collision System / Stop Light Relay Actuator Stuck (C142571)

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Pre-collision / Pre-collision System / Stop Light Relay Actuator Stuck (C142571)

DESCRIPTION

The stop light switch and skid control ECU (brake actuator assembly) output stop light signals. If the skid control ECU (brake actuator assembly) detects a malfunction in circuits related to the stop light, it informs the millimeter wave radar sensor assembly via CAN communication, and DTC C142571 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C142571	Stop Light Relay Actuator Stuck	When the ignition switch is ON for 3 seconds or more, a stop light circuit malfunction signal is received from the skid control ECU (brake actuator assembly) for 1 second or more.	Vehicle stability control system

PROCEDURE

1.	INSPECT VEHICLE STABILITY CONTROL SYSTEM

HINT:

If DTC C142571 is output by the pre-collision system, perform troubleshooting for the vehicle stability control system.

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