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Home >> Mitsubishi >> 2010 >> Lancer ES, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Continuously Variable Transaxle On-Vehicle Service -- Lancer) >> Diagnosis >> Symptom Procedures >> Inspection Procedure 7: The fluid temperature warning lamp illuminates too frequently >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. STEP 1. M.U.T.-III special function 

    Check the deterioration level of the transmission fluid.

    NOTE: The transmission fluid deterioration level is the accumulation of the values counted depending on the fluid temperature of a certain period of time, and it shows the thermal deterioration level of the transmission fluid.

    Q: Is the deterioration level of the transmission fluid less than 210,000? 

    1. YES:  Go to Step 2.
    2. NO:  Replace the transmission Fluid.
  2. STEP 2. M.U.T.-III data list 

    Item 5: Transmission fluid temperature sensor (Refer to DATA LIST REFERENCE TABLE  .)

    Q: Is the check result normal? 

    1. YES:  Go to Step 3.
    2. NO:  Diagnosis code No.P0712, P0713: Diagnose the transmission fluid temperature sensor DTC P0710: MALFUNCTION OF TRANSMISSION FLUID TEMPERATURE SENSOR; DTC P0712*: MALFUNCTION OF TRANSMISSION FLUID TEMPERATURE SENSOR (SHORT); DTC P0713*: MALFUNCTION OF TRANSMISSION FLUID TEMPERATURE SENSOR (OPEN)  .
  3. STEP 3. Air-cooled transmission fluid cooler system clogging check <2.4 L engine> 

    Check if the air-cooled transmission fluid cooler system is clogged according to the following procedure.

    CAUTION: Do not reuse the drained transmission fluid.
    1. Remove the transmission fluid cooler hose assembly.
    2. Blow air into the transmission fluid cooler hose assembly, and check that the air comes out from the opposite side.
    3. Blow air into the air-cooled transmission fluid cooler (A in the figure), and check that the air comes out from the opposite side (B in the figure).
    4. Install the parts, and replenish the transmission fluid to the specified quantity.

      Q: Is the check result normal? 

      1. YES:  Go to Step 4.
      2. NO:  Replace the part(s) having damage or other problems.
        Fig 1: Identifying Transmission Fluid Cooler Hose Assembly And Air-Cooled Transmission Fluid Cooler
        G06665766Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. STEP 4. Thermo valve check 

    Refer to THERMO VALVE CHECK  .

    Q: Is the check result normal? 

    1. YES:  Go to Step 5.
    2. NO:  Replace the thermo valve.
  5. STEP 5. Coolant system clogging check 

    Check if the coolant system is clogged according to the following procedure.

    CAUTION: Do not reuse the drained coolant.
    1. Drain the coolant.
    2. Remove water feed hose A, water feed hose B and water return hose A.
    3. Blow air into the removed parts, and check that the air comes out from the opposite side.
    4. Blow air into the coolant outlet (A in the figure), and check that the air comes out from the opposite side (B in the figure).
    5. Install the parts, and replenish the coolant to the specified quantity.

      Q: Is the check result normal? 

      1. YES:  Go to Step 6.
      2. NO:  Replace the part(s) having damage or other problems.
        Fig 2: Identifying Water Feed Hose And Water Return Hose
        G06665767Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. STEP 6. Retest the system. 

    Q: Does a malfunction take place again? 

    1. YES:  Replace the CVT assembly.
    2. NO:  Intermittent malfunction
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