|
Steering wheel sensor stores the neutral position learned by M.U.T.-III. When the neutral
position has not been stored in the steering wheel sensor yet, the steering wheel sensor outputs the
signal indicating that it does not have neutral position.
|
|
This diagnosis code is set when ASC-ECU detects that the steering wheel sensor has not
learned the neutral position yet.
|
|
- Neutral position of steering wheel sensor not learned
- Steering wheel sensor malfunction
- ASC-ECU malfunction
|
|
Use M.U.T.-III to diagnose the CAN bus lines.
|
|
Q.
Is the check result normal?
|
|
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
On completion, go to Step 2.
|
|
|
|
Q.
Is diagnosis code No.C121A set?
|
|
This diagnosis is complete.
|
|
|
|
Check that the steering wheel sensor is installed correctly (Refer to ).
|
|
Q.
Is the check result normal?
|
|
Install the steering wheel sensor correctly (Refer to ),
and then go to Step 4.
|
|
|
|
Perform calibration of steering wheel sensor (Refer to ).
|
|
Q.
Has the calibration succeeded?
|
|
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 5.
|
|
|
|
Erase the diagnosis code.
|
|
Q.
Is diagnosis code No.C121A set?
|
|
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ),
and then go to Step 6.
|
|
|
|
This diagnosis is complete.
|
|
|
|
Erase the diagnosis code.
|
|
Q.
Is diagnosis code No.C121A set?
|
|
This diagnosis is complete.
|
|
|