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Home >> Mitsubishi >> 2004 >> Lancer LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Except Evolution & SPORTBACK >> Engine Control System Diagnosis >> Symptom Procedures >> Inspection Procedure 2: Throttle Valve Will Not Fully Open Or Close < 2.4L Engine > >> Diagnosis

Inspection Procedure 2: Throttle Valve Will Not Fully Open Or Close < 2.4L Engine >: Diagnosis

  1. STEP 1. Check the accelerator cable adjustment. 

    Q: Is the accelerator cable properly adjusted? 

    1. YES :  Go to Step 2.
    2. NO :  Adjust the accelerator cable by referring to ACCELERATOR CABLE CHECK AND ADJUSTMENT  and then go to  Step 3 .
  2. STEP 2. Check the accelerator pedal position sensor assembly. 

    Check that the lever of the accelerator pedal position sensor assembly moves smoothly by moving it by hand.

    Q: Does the lever of the accelerator pedal position sensor assembly move smoothly? 

    1. YES :  Go to Step 3.
    2. NO :  Replace the accelerator pedal position sensor assembly (Refer to ACCELERATOR PEDAL POSITION SENSOR <2.4L ENGINE>  ), then go to Step 3.
  3. STEP 3. Retest the system. 

    Q: Does the throttle valve fully open and close? 

    1. YES :  The procedure is complete.
    2. NO :  Return to  Step 1 .