C1261

C1261

Component Location:

General Description
The Steering angle sensor (SAS) is installed at the steering column and uses CAN communication.
The 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 0 set because the SAS measures a absolute angle.
0 set is done by using the scantool device. If abnormal 0 set is detected or no information in SAS is detected, a failure is reconized.

DTC Detecting Condition:

Schematic Diagram:

Monitor Scantool Data
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & Engine "ON".
3. Monitor the "SAS CALIBRATED" parameters on the Scantool.

Specification: YES






4. 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. Set the steering wheel so that the wheels point straight ahead.
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.