About this document
DTC P0504 Diagnosis for Toyota Vehicles by Felipe CI is a document available to read on EtoBox.
The document provides information about diagnostic trouble code P0504 related to the brake switch system in a Toyota vehicle. The brake switch system uses two signals (STP and ST1-) from the stop lamp switch to detect if the acceleration system is abnormal. Normal operation of the switch is described. The diagnostic trouble code is set if the STP signal is off while the ST1- signal is off for more than 0.5 seconds, indicating a potential issue with the stop lamp switch, its circuit, or the ECM. A wiring dia
- Author
- Felipe CI
- Language
- EN