C1261

DTC C1261 STEERING ANGLE SENSOR IS NOT CALIBRATED

COMPONENT LOCATION:

GENERAL DESCRIPTION
The Steering Angle Sensor (SAS) is used to determine turning direction and speed of the steering wheel. The HECU uses the signals from the SAS when performing ESC-related calculations.

DTC DESCRIPTION
The SAS used for ESC control needs zero point adjustment because the SAS measures an absolute angle. zero point adjustment is done by using the scantool device. If abnormal zero point adjustment is detected, a failure is recognized.

DTC DETECTING CONDITION:

MONITOR SCANTOOL DATA
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & Engine "ON".
3. Turn the steering wheel to the full left or right position.
4. Monitor the "steering sensor" parameters on the Scantool.





5. Is parameter displayed within specifications?
YES
> Fault is caused by having been repaired and HECU memory was not cleared. Clear the DTC and then go to "Verification of Vehicle Repair" procedure.
NO
> Go to "Component Inspection" procedure.

COMPONENT INSPECTION
1. Line up wheels like (figure 1).
1) Perform the wheel alignment.
2) Line up the steering wheel in a straight.
3) Go ahead and Go back the vehicle 2-3 times without holding steering wheel.
2. Connect scantool to Data Link Connector (DLC).
3. Go in Anti-Lock brake system. (figure 2).
4. Perform steering angle sensor calibration. (figure 3).
5. Disconnect scantool.
6. Check the condition of SAS zero point adjustment by operating the vehicle (turn right and left at least 1 time)





7. Is zero point adjustment completed?
YES
> Go to "Verification of Vehicle Repair" procedure.
NO
> Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Using a scantool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information
4. Are any DTCs present?
YES
> Go to the applicable troubleshooting procedure.
NO
> System performing to specification at this time.