General Information: DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	Open circuit monitoring	Open circuit in brake switch line Faulty brake light switch Faulty input stage in HECU
Enable Conditions	If both BLS (brake lamp switch) and BS (brake switch) have a same state and MCP (Master Cylinder Pressure) >20bar for 500ms. Outside an ABS/ESC control, and after normal operation of MCP, If the pressure sensor signal is higher than 20bar and BLS is low for 3sec. If the BLS/BS changed more than 40 times and MCP>20bar for 5 sec. While Vehicle speed > 10 km/h, TPS > 5%, MCP < 7bar, if BLS is high over 1min.
Fail Safe	Inhibit the ESC/DBC control and allow the ABS/EBD control The ESC warning lamp is activated