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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 >> Diagnostic Trouble Code Procedures >> DTC P1740: Malfunction of Lockup/Select Switching Solenoid Valve >> Diagnostic Procedure

Diagnostic Procedure

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

    Item 36: LU/SEL changeover SOL. output

    Item 37: LU/SEL changeover SOL. monitor

    OK: Check that the output and monitor do not differ greatly. 

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction
    2. NO:  Go to Step 2.
  2. STEP 2. Check the following connector: 
    • B-08 CVT assembly connector
    • C-41 TCM connector
    • A-09 Intermediate connector

      Check the terminals for a contact status problem and internal short circuit.

      Q: Is the check result normal? 

      1. YES:  Go to Step 3.
      2. NO:  Repair the defective connector.
  3. STEP 3. Check for open circuit and short to ground in the wiring harness between the TCM connector and the CVT assembly connector. 

    Between C-41 TCM connector (terminal No. 14) and B-08 CVT assembly connector (terminal No. 4)

    Q: Is the check result normal? 

    1. YES:  Go to Step 4.
    2. NO:  Repair the wiring harness.
  4. STEP 4. Lockup/select switching solenoid valve single unit check 

    Refer to SOLENOID VALVE CHECK  .

    Q: Is the check result normal? 

    1. YES:  Go to Step 5.
    2. NO:  Replace the valve body assembly.
  5. STEP 5. Symptom recheck after erasing diagnosis code 

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction
    2. NO:  Replace TCM.