Code No.C1219: Steering angle sensor signal



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 (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • Whenever the steering wheel sensor is replaced, always calibrate the sensor.(Refer to GROUP 35C - Steering Wheel Calibration ). Then make the steering wheel sensor learn the compensation which the PHEV-ECU has stored. (Item: Initialisation, Item No. 3: Steering Angle Offset Reset )
  • When the hydraulic unit (integrated with ASC-ECU) is replaced, after vehicle information from ETACS-ECU is registered (power supply mode of the electric motor switch: OFF from ON), always carry out the calibration of all sensors (steering wheel sensor, G and yaw rate sensor, and brake fluid pressure sensor) at one time. (Refer to GROUP 35C - All Sensor Calibration ).

TROUBLE JUDGEMENT


The PHEV-ECU stores diagnosis code No. C1219 when the steering wheel sensor signal fails.

PROBABLE CAUSES



  • Improper installation of steering wheel sensor
  • Malfunction of wheel speed sensor
  • Malfunction of G sensor has not been learned.
  • ASC-ECU malfunction
  • Wheel alignment not performed
  • Different steering wheel
  • Malfunction of wheel speed sensor
  • Malfunction of PHEV-ECU
  • The straight-forward position of the front wheels does not correspond to the neutral position of the steering wheel.

DIAGNOSIS PROCEDURE


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


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

Q. Is the check result normal?

Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Go to Step 3.
The procedure is complete.

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



  • Use M.U.T.-III to check whether the ASC-ECU related diagnosis code is stored or not. (Refer to GROUP 35C - Diagnosis Code Chart and ).

Q. Is the diagnosis code stored?

Troubleshoot for the relevant diagnosis code.
Go to Step 4.

STEP 4. M.U.T.-III diagnosis code


Check that the wheel speed sensor-related, G and yaw rate sensor-related, or steering wheel sensor-related diagnosis code is stored. (Refer to )

Q. Is the diagnosis code stored?

Troubleshoot the relevant diagnosis code.
Go to Step 5.

STEP 5. Check how steering wheel sensor is installed.


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, and then go to Step 6.

STEP 6. Wheel alignment check


Q. Is the check result normal?

After the wheel alignment check, perform the steering wheel sensor calibration to make ASC-ECU learn the neutral point again (Refer to GROUP 35C - Steering Wheel Calibration ). Then go to Step 7.
After the adjustment of the wheel alignment, perform the steering wheel sensor calibration to make ASC-ECU learn the neutral position again (Refer to ). Then go to Step 7.

STEP 7. M.U.T.-III data list


Use M.U.T.-III to check whether the PHEV-ECU related data list is set or not. (Refer to ).

  • Item No.330: Yaw rate
  • Item No.331: Lateral acceleration
  • Item No.332: Longitudinal acceleration

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 8.

STEP 8. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Replace the PHEV-ECU (Refer to ). Then go to Step 9.
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

STEP 9. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Return to Step 1.
The procedure is complete.