DTC P0571: Brake Switch "A" Circuit [12/2013 - 11/2016]: Description
WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- When the brake pedal is depressed, the stop light switch assembly sends a signal to the ECM. When the ECM receives this signal, it cancels the dynamic radar cruise control. The fail-safe function operates to enable normal driving even if there is a malfunction in the stop light signal circuit. The cancellation condition occurs when voltage is applied to terminal STP. When the brake is applied, voltage is applied to terminal STP of the ECM through the STOP fuse and the stop light switch assembly, and the ECM turns the dynamic radar cruise control system off.
- The ECM receives the brake demand signal from the driving support ECU assembly and sends it to the skid control ECU (brake actuator assembly). The skid control ECU (brake actuator assembly) receives the signal from the ECM and operates the skid control ECU (brake actuator assembly). The skid control ECU (brake actuator assembly) operates the brake actuator and at the same time illuminates the stop lights by operating the stop light switch assembly (stop light control relay).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0571 | Brake Switch "A" Circuit | (Condition 1)
(Condition 2)
|
(Condition 1)
(Condition 2)
|