DTC C1503 ESC Switch Error: DTC Detecting Condition

DTC DETECTION CONDITION AND POSSIBLE CAUSE

Item	Detecting Condition	Possible cause
DTC Strategy	Short circuit monitoring	ESC switch short to battery Faulty ESC switch
Detect Mode	Initial Check Outside the ABS control cycle Inside the ABS control cycle Diagnosis mode Failure mode
Enable Conditions	When the ESC switch is ON for 60sec.
Fail Safe	Inhibit the ESC control and allow the ABS/EBD control. Meanwhile, stop checking the ESC switch failure under the ESC control. The ESC warning lamps are activated.