1.
CHECK INSTALLING OF STEERING ANGLE SENSOR
Check if the steering angle sensor is properly installed.
Is the installing proper?
▶ Reinstall the steering angle sensor properly.
▶ Check power of steering angle sensor
Steering angle sensor is a plate between the photo-controller LED and the photo transistor. As the plate rotates with steering wheel rotation, electrical signal will be generated depending on whether the LED light passes through the plate to the photo-transistor or not. The signal is the steering wheel operation angular velocity and used to detect the steering wheel turning direction.
This code shows in case that there is an open or short in the circuit of the steering angle sensor.
DTC No. | Detecting Condition | Possible Cause |
C1259 | 1.When Vsas > 4.4 or Vsas < 1.1 or 2.3V < Vsas < 2.7V continue 1sec, 2.The Monitoring starts 1 sec after Power Up. | - Faulty steering angle sensor - Faulty installing of steering angle sensor - Faulty HECU |
The ESP function is inhibited, while the ABS and EBD controls allowed.
The ESP warning lamp is ON, but the ABS and EBD warning lamps OFF.
CHECK INSTALLING OF STEERING ANGLE SENSOR
Check if the steering angle sensor is properly installed.
Is the installing proper?
▶ Reinstall the steering angle sensor properly.
▶ Check power of steering angle sensor
CHECK POWER OF STEERING ANGLE SENSOR
Disconnect the steering angle sensor connector, and measure the voltage between terminals 2 and 3 of the steering angle sensor connector.
Specification : 9~16 V
Is the voltage within the specification?
▶ Check harness and connector between the HECU and the steering angle sensor.
▶ Check output voltage of steering angle sensor
CHECK OUTPUT VOLTAGE OF STEERING ANGLE SENSOR
Measure the voltage between terminal 1,4, and 5 of the steering angle sensor connector and the body ground.
Specification : High : 3.0~4.1V
Low : 1.3~2.0V
Is the voltage within the specification?
▶ Check harness and connector of the steering angle sensor. If no error on the harness and the connector, replace the steering angle sensor and recheck.
▶ Check output of HECU connector
CHECK OUTPUT OF HECU CONNECTOR
Measure the voltage between terminal 8,40, and 39 of the HECU connector and the body ground.
Specification : High : 3.0~4.1V
Low : 1.3~2.0V
Is the voltage within the specification?
▶ Repair harness and connector between the HECU and the steering angle sensor.
▶ After clearing the DTC and driving the vehicle at 40Km/h speed or more, if the ESP lamp is ON and the same DTC shows again, replace the HECU and recheck.
