DTC C1295, C1307, C1937, C1938, C1956 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2801900

DTC | C1295, C1307, C1937, C1938, C1956 | Steering angle sensor system
DETECTION CONDITION | • C1295 ― Steering angle sensor malfunction is detected by CAN signal from the steering angle sensor. • C1307 ― Steering angle signal error from the steering angle sensor is continuously detected for 100 ms. • C1937 ― The difference between the steering angle calculated by each sensor and the steering angle from the steering angle sensor exceeds the specification. • C1938 ― Condition 1 • Variation of the steering angle sensor signal exceeds the specified value, or does not vary at all. ― Condition 2 • When comparing the yaw rate value calculated from the ABS wheel-speed sensor signal and steering angle sensor signal with the yaw rate sensor signal, one is + and the other is - while the vehicle is moving forward. • C1956 ― There is no signal received from the steering angle sensor.
POSSIBLE CAUSE | • Deviation of the steering wheel center position due to improper front wheel alignment • Improper installation or positioning of the steering angle sensor • Steering angle sensor malfunction • Poor connection at connectors (female terminal)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT STEERING WHEEL FOR OFF-CENTER • Drive the vehicle and inspect the steering wheel position while driving in a straight line. • Is the steering wheel off-center? | Yes | Go to the next step.
No | Inspect and adjust the front wheel alignment to correct the steering wheel alignment. (See FRONT WHEEL ALIGNMENT.) Go to Step 3.
2 | INSPECT STEERING ANGLE SENSOR • Inspect the steering angle sensor. (See STEERING ANGLE SENSOR INSPECTION.) • Is the steering angle sensor normal? | Yes | Go to the next step.
No | Replace the steering angle sensor, then go to the next step. (See STEERING ANGLE SENSOR REMOVAL/INSTALLATION.)
3 | VERIFY DTC TROUBLESHOOTING COMPLETED • Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle. • Are the same DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM.
No | Go to the next step.
4 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No | DTC troubleshooting completed.