Code No. C1219
Steering angle sensor signal
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caution |
- If there is
any problem in the CAN bus lines, an incorrect diagnosis code 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
).
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Steering wheel sensor outputs the signal to ASC-ECU via the CAN bus lines.
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DIAGNOSIS CODE SET CONDITIONS
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This diagnosis code is set if any malfunction below is found:
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- 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.
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- 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
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STEP 1. M.U.T.-III CAN bus diagnostics
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Use M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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Go to Step 3
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Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
On completion, go to Step 2.
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STEP 2. Diagnosis code recheck after resetting CAN bus lines
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Q.
Is diagnosis code No.C1219 set?
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Go to Step 3
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This diagnosis is complete.
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STEP 3. M.U.T.-III diagnosis code
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Check that the wheel speed sensor-related, G and yaw rate sensor-related, or steering
wheel sensor-related diagnosis code is set.
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Q.
Is the diagnosis code set?
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Troubleshoot the relevant diagnosis code, and then go to Step 8.
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Go to Step 4
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STEP 4. Check how steering wheel sensor is installed.
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Check that the steering wheel sensor is installed correctly (Refer to ).
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Q.
Is the check result normal?
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Go to Step 5
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Install the steering wheel sensor correctly (Refer to ),
and then go to Step 5.
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STEP 5. Wheel alignment check
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Q.
Is the check result normal?
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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.
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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.
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STEP 6. M.U.T.-III data list
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Check the following data list (Refer to ).
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Q.
Is the check result normal?
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Go to Step 7
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After the steering wheel sensor is replaced, perform the steering wheel sensor
calibration to make ASC-ECU learn the neutral point again (Refer to ).
Then go to Step 8.
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STEP 7. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the steering wheel to either right or left at 20 km/h or more.
note |
The ASC warning/operation lamp and the ASC OFF lamp may remain on until the vehicle
speed reaches approx. 10 km/h, then the steering wheel is turned to either right or
left.
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Q.
Is diagnosis code No.C1219 set?
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Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and
then go to Step 8.
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This diagnosis is complete.
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STEP 8. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the steering wheel to either right or left at 20 km/h or more.
note |
The ASC warning/operation lamp and the ASC OFF lamp may remain on until the vehicle
speed reaches approx. 10 km/h, then the steering wheel is turned to either right or
left.
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Q.
Is diagnosis code No.C1219 set?
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Return to Step 1.
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This diagnosis is complete.
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