Code No. C1394: INCOMP.learn neutral(SAS)


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • When the FCM-ECU is replaced, calibrate the radar (refer to ).

OPERATION


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

DIAGNOSIS CODE SET CONDITION


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

note A diagnosis code is not set as a historic fault.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. Steering wheel sensor calibration
Perform calibration of steering wheel sensor (Refer to ).

Q. Has the calibration succeeded?
Go to Step 3.
Replace the column switch assembly (Integrated with steering wheel sensor) (Refer to GROUP 54A - Column Switch ).

STEP 3. M.U.T.-III data list.
Check the following data list (Refer to ).

  • Item No.25: Steering angle sensor state

Q. Is the check result normal?
Go to Step 4.
Replace the steering wheel sensor (Refer to Steering Wheel Sensor ).

STEP 4. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the FCM-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Start the engine.
(4)On completion, check that the diagnosis code is set again.

Q. Is diagnosis code No. C1394 set?
Replace the FCM-ECU (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).