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INSPECTION PROCEDURE 5: When the TCL Switch is Push On, TCL does not Cancelled.: Diagnosis

Required Special Tools: 

  1. STEP 1. Measure the terminal voltage at ABS/TCL-ECU connector A-02 < FWD > or TCL/ASC-ECU connector A-32 < AWD >. 
    1. Disconnect the ABS/TCL-ECU connector A-02 < FWD > or the TCL/ASC-ECU connector A-32 < AWD >.
      Fig 1: Identifying ABS/TCL-ECU Connector A-02 And TCL/ASC-ECU Connector A-32
      G04282529Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Vehicles for FWD, connect special tool MB991970 between the ABS/TCL-ECU and the body-side harness connector A-02.
      Fig 2: Measuring Between ABS/TCL-ECU And Body-Side Harness Connector A-02
      G04282530Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    3. Vehicles for AWD, connect special tool MB991952 between the TCL/ASC-ECU and the body-side harness connector A-32.
    4. Turn the ignition switch to the "ON" position.
    5. Vehicles for FWD, measure the terminal voltage between special tool MB991970 connector terminal 6 (ABS/TCL-ECU connector A-02 terminal 6) and ground.
      • When the TCL switch is not pressed, the voltage should measure battery positive voltage (approximately 12 volts).
      • When the TCL switch is pressed, the voltage should measure 1 volt or less.
    6. Vehicles for AWD, measure the terminal voltage between special tool MB991952 connector terminal 15 (TCL/ASC-ECU connector A-32 terminal 15) and ground.
      • When the TCL switch is not pressed, the voltage should measure battery positive voltage (approximately 12 volts).
      • When the TCL switch is pressed, the voltage should measure 1 volt or less.
    7. Turn the ignition switch to the "LOCK" (OFF) position.
    8. Vehicles for FWD, disconnect special tool MB991970 between the ABS/TCL-ECU and the body-side harness connector A-02.
    9. Vehicles for AWD, disconnect special tool MB991952 between the TCL/ASC-ECU and the body-side harness connector A-32.
    10. Connect the ABS/TCL-ECU connector A-02 < FWD > or the TCL/ASC-ECU connector A-32 < AWD >.

    Q: Is the terminal voltage battery positive voltage when the TCL switch is not pressed, and is the terminal voltage 1 volt or less when the TCL switch is pressed? 

    YES  : Go to  Step 6.

    NO  : Go to Step 2.

    Fig 3: Measuring Terminal Voltage Between Special Tool Connector Terminal 15
    G04282531Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. STEP 2. Check the TCL switch. 
    1. Remove the TCL switch. (Refer to TCL SWITCH  ).
    2. Connect an ohmmeter to the TCL switch between terminals 1 and 2.
    3. Check for continuity between terminals 1 and 2 when the TCL switch is operated.
      • There is no continuity between terminals 1 and 2 when the TCL switch is not pressed.
      • There is continuity between terminals 1 and 2 when the TCL switch is pressed.

    Q: Is there no continuity between terminals 1 and 2 when the TCL switch is not pressed, and is there continuity when the TCL switch is pressed? 

    YES  : Install the TCL switch. (Refer to TCL SWITCH  ). Then go to  Step 6.

    NO  : Replace the TCL switch. (Refer to TCL SWITCH  ). Then go to  Step 7.

    Fig 4: Checking Continuity Between Terminals 1 And 2
    G04282532Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  3. STEP 3. Check ABS/TCL-ECU connector A-02 < FWD > or TCL/ASC-ECU connector A-32 < AWD >, intermediate connector C-31 and TCL switch connectors C-35 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are there connectors and terminals in good condition? 

    YES  : Go to Step 4.

    NO  : Repair or replace the faulty connector. (Refer to HARNESS CONNECTOR INSPECTION ). Then go to  Step 7.

    Fig 5: Identifying ABS/TCL-ECU Connector A-02 And TCL/ASC-ECU Connector A-32
    G04282533Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 6: Identifying Intermediate Connector C-31 And TCL Switch Connectors C-35
    G04282534Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. STEP 4. Check the harness wire between ABS/TCL-ECU connector A-02 terminal 6 < FWD > or TCL/ASCETIC connector A-32 terminal 15 < AWD > and TCL switch connector C-35 terminal 1 for damage. 

    Q: Are there harness wires in good condition? 

    YES  : Go to Step 5.

    NO  : Repair the damaged harness wire. Then go to  Step 7.

    Fig 7: Identifying ABS/TCL-ECU Connector A-02 And TCL/ASC-ECU Connector A-32
    G04282535Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 8: Identifying TCL Switch Connector C-35
    G04282536Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  5. STEP 5. Check the harness wire between TCL switch connector C-35 terminal 2 and ground for damage. 

    Q: Is the harness wire in good condition? 

    YES  : Go to Step 6.

    NO  : Repair the damaged harness wire. Then go to  Step 7.

    Fig 9: Identifying TCL Switch Connector C-35
    G04282537Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 10: Identifying A/T Selector Lever
    G04282538Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. STEP 6. Retest the system 

    Q: Is TCL cancelled when the TCL switch is push on? 

    YES  : It can be assumed that this malfunction is intermittent. (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS ).

    NO  : Replace the hydraulic unit (integrated with ABS/TCL-ECU < FWD > or TCL/ASC-ECU < AWD >). (Refer to HYDRAULIC UNIT ). Then go to Step 7.

  7. STEP 7. Retest the system 

    Q: Is TCL cancelled when the TCL switch is push on? 

    YES  : The procedure is complete.

    NO  : Return to  Step 1.

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