DTC P0571-13: Brake Switch "A" Circuit Open [08/2019 - ]: Description
The skid control ECU (brake actuator assembly) detects the brake operating conditions through a signal transmitted by the stop light switch.
The skid control ECU incorporates a circuit to detect an open circuit. This DTC is output when an open circuit is detected in the stop light signal input line.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0571-13 | Brake Switch "A" Circuit Open | When the +BS terminal voltage is 9.5 V or higher, the stop light drive output (STPO) is OFF continuously for 0.1 seconds or more and there is an open circuit between A and B in the STP terminal circuit continuously for 0.3 seconds or more. |
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