DTC C1503-01: TCS Switch Error: General Description
Driver can inhibit the ABS/ESP/ESC control by ABS/ESP/ESC switch.
When switch signal sends into the ABS/ESP/ESC, the ABS/ESP/ESC warning lamp goes "ON" and the ABS/ESP/ESC control is stopped and if the next switch signal is inputted again, the ABS/ESP/ESC control is ready. This function is used for sporty driving or vehicle inspection.