Code No.C1219: Steering wheel sensor signal malfunction

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 ), and reset the steering wheel sensor correction amount stored in the 4WD-ECU. (Item No. 1: SAS adjusted value ).
When the hydraulic unit (integrated with ASC-ECU) is replaced, after turning the ignition switch ON or OFF (vehicle information from ETACS-ECU is registered), always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor, and brake fluid pressure sensor.(refer to GROUP 35C - On-vehicle Service , and .)

OPERATION

4WD-ECU receives steering wheel data from the steering wheel sensor via CAN communication.

DIAGNOSIS CODE SET CONDITIONS

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

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
Wheel alignment not adjusted
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 stored again.

Q. Is diagnosis code No.C1219 stored?

	Go to Step 3

	This diagnosis is complete.

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

Q. Is diagnosis code No.C2205 stored?

	Perform the relevant troubleshooting. (Refer to .)

	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 stored.

Q. Is the diagnosis code stored?

	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, carry out calibration of steering wheel sensor to make ASC-ECU relearn the neutral point. (Refer to GROUP 35C - On-vehicle Service .) 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 stored again.

Q. Is diagnosis code No.C1219 stored?

	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 stored again.

Q. Is diagnosis code No.C1219 stored?

	Return to Step 1.

	This diagnosis is complete.