Brake Switch "A" Circuit

DTC P0571 Brake Switch "A" Circuit

DESCRIPTION

DTC Detection Condition:

When the brake pedal is depressed, the stop light switch sends a signal to the hybrid vehicle control ECU.
When the hybrid vehicle control ECU receives this signal, it cancels the 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 normally applied to terminal STP of the hybrid vehicle control ECU through the STOP SW fuse and the stop light switch, and the hybrid vehicle control ECU turns the cruise control off.

Wiring Diagram:

Step 1-3:

Step 4:

INSPECTION PROCEDURE