DTC P0571 Stop Light Switch Circuit Malfunction: Description
WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
The ECM receives the brake demand signal from the cruise control ECU (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 illuminations the stop light by operating the BRK relay at the same time.
DTC DETECTION CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0571 | This trouble code is output when the ECM detects the BRK relay error signal from the ABS & traction actuator assembly (skid control ECU) for 0.2 sec. or more while the dynamic cruise control is in operation. |
|