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.

FAIL-SAFE

•  C1295, C1307, C1937, C1956

―  Inhibits TCS control and DSC control, and illuminates DSC indicator light.
(If error is detected during a TCS control, inhibits TCS control after finishing the control.)

•  C1938

―  Condition 1

•  Inhibits TCS control and DSC control, and illuminates DSC indicator light.
(If error is detected during a TCS control, inhibits TCS control after finishing the control.)

―  Condition 2

•  Inhibits TCS control and DSC control, and illuminates DSC indicator light.
(If error is not detected when system is activated next time, enables (restores) each control and turns each light off.)

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.
1		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.
2		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.
3		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)].)
4		No	DTC troubleshooting completed.

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.
FAIL-SAFE		• C1295, C1307, C1937, C1956 ― Inhibits TCS control and DSC control, and illuminates DSC indicator light. (If error is detected during a TCS control, inhibits TCS control after finishing the control.) • C1938 ― Condition 1 • Inhibits TCS control and DSC control, and illuminates DSC indicator light. (If error is detected during a TCS control, inhibits TCS control after finishing the control.) ― Condition 2 • Inhibits TCS control and DSC control, and illuminates DSC indicator light. (If error is not detected when system is activated next time, enables (restores) each control and turns each light off.)
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)