P0574
CIRCUIT DESCRIPTIONThis diagnostic test functions on the assumption that a sudden decrease in vehicle speed must be caused by a brake application. If there is a 4.02 km/h (2.5 mph) or greater decrease in vehicle speed within 0.4 seconds and a transition of the TCC brake switch without a transition of the stop lamp switch, the PCM sets DTC P1574.
CONDITIONS FOR RUNNING THE DTC
^ DTCs P0502, P0503, P0719, P0724, P1575 and P1602 are not set.
^ The traction control system and the antilock brake system have not failed.
^ The traction control system and the antilock brake system are not active.
CONDITIONS FOR SETTING THE DTC
^ The vehicle speed decreases by at least 4.02 km/h (2.5 mph) within 4 seconds.
^ The PCM detects a TCC brake transition.
^ The PCM does not detect a stop lamp switch transition.
ACTION TAKEN WHEN THE DTC SETS
^ The PCM sets the stop lamp switch status to released.
^ The PCM disables the operation of the cruise control system.
CONDITIONS FOR CLEARING THE DTC
^ A history DTC will clear after 40 malfunction free warm-up cycles.
^ The PCM receives a clear code command from the scan tool.
TEST
