Code No.C1219: Steering Wheel Sensor Signal <ASC>


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.
  • 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 ), and reset the steering wheel sensor correction amount stored in the 4WD-ECU. (Item No. 1: SAS adjusted value ).
  • When hydraulic unit (integrated with G and yaw rate sensor) is replaced, calibrate G and yaw rate sensor (refer to GROUP 35C - On-vehicle Service )

OPERATION



DIAGNOSIS CODE SET CONDITIONS




  • The tolerance of neutral position of steering wheel sensor exceeds the specified range.
  • Abnormality in steering wheel sensor output value
  • Incorrect installation is detected by the initial check of the steering wheel sensor signal.
  • Abnormality is detected by a comparison of output value from the steering wheel sensor with the output values from wheel speed sensor and G and yaw rate sensor.

PROBABLE CAUSES



  • Improper installation of steering wheel sensor
  • Malfunction of steering wheel sensor
  • Malfunction of G and yaw rate sensor
  • Malfunction of wheel speed sensor
  • Malfunction of 4WD-ECU
  • Vehicle straight-ahead position and steering wheel neutral position is not matched.

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 3.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1219 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. M.U.T.-III diagnosis code.

Q. Is diagnosis code No.C2205 set?
Perform the relevant troubleshooting.
Go to Step 4.

STEP 4. M.U.T.-III diagnosis code.
Check if the wheel speed sensor-related, G and yaw rate sensor-related, or steering wheel sensor-related diagnosis code is set.

Q. Is the diagnosis code set?
Carry out the appropriate troubleshooting. Then go to Step 9.
Go to Step 5.

STEP 5. Check of steering wheel sensor installation status
Check that the steering wheel sensor is installed correctly (Refer to GROUP 35C - Steering Wheel Sensor ).

Q. Is the check result normal?
Go to Step 6.
Install the steering wheel sensor correctly. Then go to Step 6.

STEP 6. Wheel alignment check

Q. Is the check result normal?
After checking the wheel alignment, calibrate the steering wheel sensor (Refer to GROUP 35C - On-vehicle Service ), and reset the steering wheel sensor correction amount stored in the 4WD-ECU(Refer to ). Then, go to Step 7.
After adjusting the wheel alignment, calibrate the steering wheel sensor (Refer to GROUP 35C - On-vehicle Service ), and reset the steering wheel sensor correction amount stored in the 4WD-ECU(Refer to ). Then, go to Step 7.

STEP 7. M.U.T.-III data list.
Check the following data list (Refer to).

  • Item No.8: Steering angle sensor

Q. Is the check result normal?
Go to Step 8.
Replace the steering wheel sensor (Refer to GROUP 35C - Steering Wheel Sensor ). Then, go to Step 9.

STEP 8. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1219 set?
Replace the 4WD-ECU (Refer to ). Then, go to Step 9 .
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 9. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1219 set?
Return to Step 1.
This diagnosis is complete.