Code No.C1219: Steering Wheel Sensor System (Faulty Signal)


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 initialise the steering angle correction amount stored in AWC-ECU. (Item No.1: Steering angle correction amount initialisation ).
  • Do not drop the G and yaw rate sensor or subject it to a shock.
  • When 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
  • 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 AWC-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 initialise AWC-ECU steering angle correction amount (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 initialise AWC-ECU steering angle correction amount (Refer to ). Then, go to Step 7.

STEP 7. M.U.T.-III data list.
Item 11: Steering wheel sensor (refer to ).

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 AWC-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.