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

caution

If there is any problem in the CAN bus lines, an incorrect diagnostic trouble 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

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

DTC SET CONDITIONS

This diagnostic trouble code is set 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
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.

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics

Using scan tool MB991958, 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 ). After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.

Q. Is DTC No. C1219 set?

	Go to Step 3.

	This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code

Q. Is DTC No. C2205 set?

	Perform the relevant troubleshooting.

	Go to Step 4.

STEP 4. Scan tool diagnostic trouble code

Check if the wheel speed sensor-related, G and yaw rate sensor-related, or steering wheel sensor-related diagnostic trouble code is set.

Q. Is the DTC 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. Scan tool 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 DTC is reset.

Q. Is DTC 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 DTC is reset.

Q. Is DTC No. C1219 set?

	Return to Step 1.

	This diagnosis is complete.