Code No. C1394: Incompleted Learn Neutral (SAS)



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
  • When the steering wheel sensor is replaced, calibrate the steering wheel sensor (Refer to GROUP 35C - On-vehicle Service ).

OPERATION


ACC/FCM-ECU communicates with the steering wheel sensor via the CAN bus lines.

DIAGNOSIS CODE SET CONDITION


This diagnosis code is stored when the abnormality below is detected:


PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics.


Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?

Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).

STEP 2. Steering wheel sensor calibration


Perform calibration of steering wheel sensor (Refer to GROUP 35C - Steering Wheel Sensor Calibration ).

Q. Has the calibration succeeded?

Go to Step 3.
Replace the steering wheel sensor (Refer to GROUP 35C - Steering Wheel Sensor ).

STEP 3. M.U.T.-III data list.


Check the following data list (Refer to ).

  • Item No.57: Steering angle sensor state

Q. Is the check result normal?

Go to Step 4.
Replace the steering wheel sensor (Refer to GROUP 35C - Steering Wheel Sensor ).

STEP 4. Check whether the diagnosis code is stored again.


Q. Is diagnosis code No.C1394 stored?

Replace the ACC/FCM-ECU (Refer to ).
This diagnosis is complete.