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Home >> Mitsubishi >> 2013 >> Lancer Evolution MR >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Manual Transaxle On-Vehicle Service - Lancer Evolution) >> Diagnosis <S-AWC (Super All Wheel Control)> >> Diagnostic Trouble Code Procedures >> DTC C123C: G And Yaw Rate Sensor (Faulty Signal) >> Diagnostic Procedure
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Diagnostic Procedure

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 

    Q: Is DTC No. C2204 set? 

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

    Check if the local CAN communication-related, 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 service data 

    Check the following service data. (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 ON-VEHICLE SERVICE ,) 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 ON-VEHICLE SERVICE ,) and initialize AWC-ECU steering angle correction amount (refer to SPECIAL FUNCTION REFERENCE TABLE  .) Then go to Step 9.
  9. STEP 9. Scan tool service data 

    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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