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DTC C1219 Steering angle sensor signal
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. 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.
  • When the steering wheel sensor is replaced, always carry out calibration to make ASC-ECU learn the neutral point (Refer to ).
 
 
OPERATION
Steering wheel sensor outputs the signal to ASC-ECU via the CAN bus lines.
 
 
 
DTC SET CONDITIONS
This DTC is set if any malfunction below is found:
  • The tolerance of 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.
 
 
 
TROUBLESHOOTING HINTS
  • Improper installation of steering wheel sensor
  • Wheel alignment not performed
  • Steering wheel sensor malfunction
  • Different steering wheel
  • Malfunction of wheel speed sensor
  • ASC-ECU malfunction
  • External noise interference
  • Wrong steering wheel is attached
 
 
 
 
DIAGNOSIS
STEP 1. Scan tool (M.U.T.-IIISE) CAN bus diagnostics.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Turn on the power supply mode of the electric motor switch.
(3) Diagnose the CAN bus line.
(4) Turn off the power supply mode of the electric motor switch.
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ). On completion, go to Step 2.
 
STEP 2. DTC recheck after resetting CAN bus lines.
Is DTC No.C1219 set?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Scan tool (M.U.T.-IIISE) DTC.
Check that the wheel speed sensor-related, G and yaw rate sensor-related, or steering wheel sensor-related DTC is set.
Is the DTC set?
Troubleshoot the relevant DTC.
Go to Step 4.
 
STEP 4. Check how steering wheel sensor is installed.
Check that the steering wheel sensor is installed correctly (Refer to ).
Is the check result normal?
Go to Step 5.
Install the steering wheel sensor correctly (Refer to ), and then go to Step 5.
 
STEP 5. Wheel alignment check.
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 ). Then go to Step 6.
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 6.
 
STEP 6. Scan tool (M.U.T.-IIISE) data list.
Check the following data list (Refer to ).
  • Item No. 11: Steering angle
Is the check result normal?
Go to Step 7.
After the steering wheel sensor is replaced, perform the steering wheel sensor calibration to make ASC-ECU learn the neutral point again (Refer to ).
 
STEP 7. Check whether the DTC is set again.
(1) Erase the DTC.
(2) Turn the steering wheel to either right or left at 12 mph (20 km/h) or more.
noteThe ASC warning/operation light and the ASC OFF light may remain on until the vehicle speed reaches approx. 6 mph (10 km/h), then the steering wheel is turned to either right or left.
Is DTC No.C1219 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
This diagnosis is complete.