DTC C1259 Steering Angle Sensor-Electrical: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible cause
DTC Strategy	Voltage Monitoring	Open or short of steering wheel sensor circuit Faulty steering wheel sensor Faulty HECU
Detect Mode	Initial Check Outside the ABS control cycle Inside the ABS control cycle Diagnosis mode Failure mode
Enable Conditions	When Vsas > 4.2 ± 0.1 V or Vsas < 1.2 ± 0.1 V or 2.1 ± 0.1 V < Vsas < 2.9 ± 0.1 V continue 1 sec. The monitoring starts 1 sec after Power Up.
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.