C1260

DTC C1260 STEERING ANGLE SENSOR - SIGNAL

GENERAL DESCRIPTION
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.

DTC DESCRIPTION
This code shows in case that there is an irregular or no signal of the steering angle sensor.

DTC Detecting Condition:

FAIL-SAFE FUNCTION
The ESC function is inhibited, while the ABS and EBD controls allowed. The ESC warning lamp is ON, but the ABS and EBD warning lamps OFF.

INSPECTION PROCEDURE
1. CHECK INSTALLING OF STEERING ANGLE SENSOR
Check if the steering angle sensor is properly installed. Is the installing proper?

NO - Reinstall the steering angle sensor properly.

YES - Check power of steering angle sensor.

2. CHECK POWER OF STEERING ANGLE SENSOR
Disconnect the steering angle sensor connector, and measure the voltage between terminal 2 and 3 of the steering angle sensor connector.

Specification: 9 - 16 V

Is the voltage within the specification?

NO - Check harness and connector between the HECU and the steering angle sensor.

YES - Check output signal of steering angle sensor.

3. CHECK OUTPUT SIGNAL OF STEERING ANGLE SENSOR
1. Check if both ST1 and ST2 alternate High and Low signal, rotating the wheel.
2. Check if STN has Low signal, rotating the wheel at 360° in one direction.
Is the signal of the steering angle sensor normal?

NO - 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.

YES - After clearing the DTC and driving the vehicle at 40 Km/h speed or more, if the ESC lamp is ON and the same DTC shows again, replace the HECU and recheck.