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Home >> Mitsubishi >> 2014 >> Lancer SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Twin Clutch SPORTRONIC Shift Transmission (TC-SST) - With Diagnostics - Lancer (5 Of 6)) >> Diagnosis < Active Center Differential (ACD) > >> Diagnostic Trouble Code Procedures >> DTC C123C: G and Yaw Rate Sensor System (Faulty Signal) >> Diagnosis

DTC C123C: G and Yaw Rate Sensor System (Faulty Signal): Diagnosis

WARNING: This page is about a different variant/trim than selected.
  1. STEP 1. Scan tool CAN bus diagnostics 

    Using scan tool MB991958, 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 TROUBLESHOOTING ). After repairing the CAN bus line, go to Step 2.
  2. STEP 2. Check whether the DTC is reset. 

    Q: Is DTC No. C123C set? 

    1. YES:  Go to Step 3.
    2. NO:  This diagnosis is complete.
  3. STEP 3. Scan tool diagnostic trouble code 

    Check the ASC diagnostic trouble code. (Refer to DIAGNOSTIC TROUBLE CODE TABLE ).

    Q: Is the check result normal? 

    1. YES:  Perform the relevant troubleshooting.
    2. NO:  Go to Step 4.
  4. STEP 4. Scan tool diagnostic trouble code 

    Check if the wheel speed sensor-related, or steering wheel sensor-related diagnostic trouble code is set.

    Q: Is the DTC set? 

    1. YES:  Perform the relevant troubleshooting.
    2. NO:  Go to Step 5.
  5. STEP 5. Check of G and yaw rate sensor installation status. 

    Check that the G and yaw rate sensor is installed correctly. (Refer to G AND YAW RATE SENSOR ).

    Q: Is the check result normal? 

    1. YES:  Go to Step 6.
    2. NO:  Reinstall the G and yaw rate sensor correctly. Then go to Step 6.
  6. STEP 6. Scan tool data list 

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

    • Item No. 26: Yaw rate sensor
    • Item No. 29: Lateral G sensor

    Q: Is the check result normal? 

    1. YES:  Go to Step 7.
    2. NO:  Replace the G and yaw rate sensor. (Refer to G AND YAW RATE SENSOR ). Then go to  Step 11.
  7. STEP 7. Check of steering wheel sensor installation status. 

    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 8.
    2. NO:  Install the steering wheel sensor correctly. Then go to Step 8.
  8. STEP 8. Wheel alignment check. 

    Q: Is the check result normal? 

    1. YES:  After checking the wheel alignment, calibrate the steering wheel sensor (Refer to STEERING WHEEL SENSOR CALIBRATION ), and initialize AWC-ECU steering angle correction amount (Refer to SPECIAL FUNCTION REFERENCE TABLE  ). Then go to Step 9.
    2. NO:  After adjusting the wheel alignment, calibrate the steering wheel sensor (Refer to STEERING WHEEL SENSOR CALIBRATION ), and initialize AWC-ECU steering angle correction amount (Refer to SPECIAL FUNCTION REFERENCE TABLE  ). Then go to Step 9.
  9. STEP 9. Scan tool data list 

    Item 11: Steering wheel sensor (Refer to DATA LIST REFERENCE TABLE  ).

    Q: Is the check result normal? 

    1. YES:  Go to Step 10.
    2. NO:  Replace the steering wheel sensor. (Refer to STEERING WHEEL SENSOR ). Then go to Step 10.
  10. STEP 10. Check whether the DTC is reset. 

    Q: Is DTC No. C123C set? 

    1. YES:  Replace the AWC-ECU. (Refer to AWC-ECU ). Then go to Step 11.
    2. NO:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
  11. STEP 11. Check whether the DTC is reset. 

    Q: Is DTC No. C123C set? 

    1. YES:  Return to  Step 1.
    2. NO:  This diagnosis is complete.
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