C1219

DTC C1219: Abnormality in steering wheel sensor 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.

CIRCUIT OPERATION
Steering wheel sensor outputs the signal to ASC-ECU via the CAN bus lines.

DTC SET CONDITIONS
This diagnostic trouble code is set if any malfunction below is found:
^ The tolerance of the neutral position of steering wheel sensor exceeds the specified range.
^ Abnormality in steering wheel sensor output value
^ When abnormality is detected by comparing the value output from the steering wheel sensor with the one from the wheel speed sensor and the G and yaw rate sensor.

PROBABLE CAUSES
^ Improper installation of steering wheel sensor
^ Wheel alignment not performed
^ Steering wheel sensor malfunction
^ Different steering wheel
^ G and yaw rate sensor malfunction
^ Malfunction of wheel speed sensor
^ ASC-ECU malfunction
^ External noise interference

DIAGNOSIS

Required Special Tools:
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827: M.U.T.-III USB Cable
^ MB991910: M.U.T.-III Main Harness A

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. On completion, go to Step 2.

STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
Q: Is DTC C1219 set?
YES: Go to Step 3.
NO: The procedure is complete.

STEP 3. M.U.T.-III diagnostic trouble code
Check that the wheel speed sensor-related, G and yaw rate sensor-related, or steering wheel sensor-related diagnostic trouble code is set.
Q: Is any DTC set?
YES: Troubleshoot the relevant diagnostic trouble code, and then go to Step 4.
NO: Go to Step 4.

STEP 4. Check how steering wheel sensor is installed.
Check that the steering wheel sensor is installed correctly.
Q: Is the check result normal?
YES: Go to Step 5.
NO: Install the steering wheel sensor correctly, and then go to Step 5.

STEP 5. M.U.T.-III data list
Check the following service data.
^ Item 11: Steering angle sensor

Q: Is the check result normal?
YES: Go to Step 6.
NO: Replace the steering wheel sensor.

STEP 6. Wheel alignment check
Q: Is the check result normal?
YES: Go to Step 7.
NO: Adjust the wheel alignment, and then go to Step 7.

STEP 7. Check whether the diagnostic trouble code is reset.
Q: Is DTC C1219 set?
YES: Replace the steering wheel sensor, and then go to Step 8.
NO: The procedure is complete.

STEP 8. Check whether the diagnostic trouble code is reset.
Q: Is DTC C1219 set?
YES: Replace ASC-ECU.
NO: The procedure is complete.