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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Continuously Variable Transaxle (CVT) On-Vehicle Service - With Diagnostics) >> Diagnosis < CVT > >> Diagnostic Trouble Code Procedures >> DTC P1778: Malfunction of Stepper Motor Function >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. STEP 1. Check other DTCs. 

    Q: Are other DTCs stored? 

    1. YES:  Carry out the appropriate troubleshooting.
    2. NO:  Go to Step 2.
  2. STEP 2. Symptom recheck after erasing DTC 

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction
    2. NO:  Replace the TCM, and then go to Step 3.
  3. STEP 3. Retest the system. 

    Q: Is the check result normal? 

    1. YES:  The inspection is complete.
    2. NO:  Replace the control valve.
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