DTC P0571-13: Brake Switch "A" Circuit Open [10/2020 - ]: Description

The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied.

The skid control ECU (brake actuator assembly) has a detection circuit that it uses to detect an open in the stop light input line.

If the skid control ECU (brake actuator assembly) detects an open in this circuit, it will store this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
P0571-13	Brake Switch "A" Circuit Open	An open in the stop light switch assembly input line continues for 3 seconds or more.	Stop light switch assembly Wire harness or connector Skid control ECU (brake actuator assembly)