DTC P0571 Stop Light Switch Circuit Malfunction: Description
The ECM receives the brake demand signal from the distance control ECU and transmits it to the skid control ECU.
The skid control ECU receives a signal from the ECM and operates the brake actuator.
The skid control ECU operates the brake actuator and at the same time illuminates the stop light by operating the BRK-LP relay.
DTC DETECTION CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0571 | This trouble code is output when the ECM detects the BRK-LP relay error signal from the skid control ECU for 0 2 sec or more while the dynamic cruise control is in operation |
|