Note. For circuit reference, see Code P0441 schematic.
Circuit Description
This test functions on the assumption that a sudden decrease in non-drive wheel speed must be caused by a brake application. Non-drive wheel speed and stop light switch status are supplied to the PCM through the serial data from the EBTCM. If there is a 2.5 MPH or greater decrease of non-drive wheel speed in .4 second and a transition of the TCC or extended travel contacts of the TCC brake switch occurs without a transition of the stop light switch, DTC will set.