DTC C1219: Abnormality in steering wheel sensor signal: 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

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus lines. 

   Use scan tool to diagnose the CAN bus lines.

   Q: Is the check result normal? 

   1. YES:  Go to  Step 3.
   2. NO:  Repair the CAN bus lines (Refer to CAN BUS DIAGNOSTICS TABLE ). On completion, go to Step 2.
2. STEP 2. DTC recheck after resetting CAN bus lines 

   Q: Is DTC C1219 set? 

   1. YES:  Go to Step 3.
   2. NO:  The procedure is complete.
3. STEP 3. Using scan tool MB991958, check the DTC 

   Check that the wheel speed sensor-related, G and yaw rate sensor-related, or steering wheel sensor-related DTC is set.

   Q: Is the DTC set? 

   1. YES:  Troubleshoot the relevant DTC, and then go to  Step 8.
   2. NO:  Go to Step 4.
4. STEP 4. Check how steering wheel sensor is installed. 

   Check that the steering wheel sensor is installed correctly (Refer to STEERING WHEEL SENSOR  ).

   Q: Is the check result normal? 

   1. YES:  Go to Step 5.
   2. NO:  Install the steering wheel sensor correctly (Refer to STEERING WHEEL SENSOR  ), and then go to Step 5.
5. STEP 5. Wheel alignment check 

   Q: Is the check result normal? 

   1. YES:  After the wheel alignment check, perform the steering wheel sensor calibration to make ASC-ECU learn the neutral point again (Refer to STEERING WHEEL SENSOR CALIBRATION  ). Then go to Step 6.
   2. NO:  After the adjustment of the wheel alignment, perform the steering wheel sensor calibration to make ASC-ECU learn the neutral position again (Refer to STEERING WHEEL SENSOR CALIBRATION  ). Then go to Step 6.
6. STEP 6. Using scan tool MB991958, check the data list 

   Check the following data list (Refer to DATA LIST REFERENCE TABLE  ).

   • Item 11: Steering angle

   Q: Is the check result normal? 

   1. YES:  Go to Step 7.
   2. NO:  After the steering wheel sensor is replaced, perform the steering wheel sensor calibration to make ASC-ECU learn the neutral point again (Refer to STEERING WHEEL SENSOR CALIBRATION  ). Then go to  Step 8.
7. STEP 7. Check whether the DTC is reset. 
   1. Erase the DTC.
   2. Drive the vehicle at 12 mph (20 km/h) or higher.
      NOTE: The ASC indicator and ASC OFF indicator do not turn OFF in some cases unless the vehicle runs at 12 mph (20 km/h) or higher.

   Q: Is DTC C1219 set? 

   1. YES:  Replace the hydraulic unit (integrated with ASC-ECU) (Refer to HYDRAULIC UNIT  ), and then go to Step 8.
   2. NO:  The procedure is complete.
8. STEP 8. Check whether the DTC is reset. 
   1. Erase the DTC.
   2. Drive the vehicle at 12 mph (20 km/h) or higher.
      NOTE: The ASC indicator and ASC OFF indicator do not turn OFF in some cases unless the vehicle runs at 12 mph (20 km/h) or higher.

   Q: Is DTC C1219 set? 

   1. YES:  Return to  Step 1.
   2. NO:  The procedure is complete.