DTC C1260 Steering Angle Sensor - Signal: DTC Detecting Condition

DTC DETECTION CONDITION AND POSSIBLE CAUSE

Item	Detecting Condition	Possible cause
DTC Strategy	Signal Monitoring	Faulty steering wheel sensor Faulty HECU
Detect Mode	Outside the ABS control cycle Inside the ABS control cycle Diagnosis mode
Enable Conditions	The STN is low more than ± 20 degrees for 70msec. When the steering wheel is turned more than 370 ± 5 degrees, if center is not detected, ECU detects the failure. When the steering wheel angle is higher than 700 degrees ECU detects the failure. During straight driving, if the steering wheel angle is larger than 55 ± 5 degree ECU detects the failure. When the curve is detected after driving straight, if there is no variation of the steering wheel angle for 3sec, ECU detect the failure. While the vehicle drive 60 ± 5 degree ↔ -60 ± 5 degree, if STN is not detected low, ECU detect the failure. While steering angle sensor wheel through center, of steering angle sensor is against specification three times, ECU detect the failure. When the curve is detected after driving straight, if estimated valve and measured value of the sensor indicate in the opposite direction for 2 times.
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.