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Home >> Mitsubishi >> 2005 >> Endeavor LS, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Traction Control System (TCL) >> Traction Control System (TCL) Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE 5: When the TCL Switch is Push On, TCL does not Cancelled. >> Diagnosis
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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 < FWD > or TCL/ASC-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
      G02389928Courtesy 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: Connecting Special Tool MB991970
      G02389929Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    3. Vehicles for AWD, connect special tool MB991970 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.
        • Fig 3: Measuring Terminal Voltage Between Special Tool Connector Terminal 6
        G02389930Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    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? 

    1. YES  : Go to  Step 6.
    2. NO  : Go to Step 2.
  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.
        Fig 4: Measuring Continuity Between Terminals 1 And 2
        G02389931Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    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? 

    1. YES  : Install the TCL switch. (Refer to TCL SWITCH ). Then go to  Step 6.
    2. NO  : Replace the TCL switch. (Refer to TCL SWITCH ). Then go to  Step 7.
  3. STEP 3. Check ABS/TCL-ECU connector A-02 < FWD > or TCL/ASC-ECU connector A-32 <4AWD>, intermediate connector C-31 and TCL switch connectors C-35 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 5: Identifying A-02, A-32 Intermediate Connector
    G02389932Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 6: Identifying C-31, A-35 Intermediate Connector
    G02389933Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are there connectors and terminals in good condition? 

    1. YES  : Go to Step 4.
    2. NO  : Repair or replace the faulty connector. (Refer to HARNESS CONNECTOR INSPECTION ). Then go to  Step 7.
  4. STEP 4. Check the harness wire between ABS/TCL-ECU connector A-02 terminal 6 < FWD > or TCL/ASC-ECU connector A-32 terminal 15 < AWD > and TCL switch connector C-35 terminal 1 for damage. 
    Fig 7: Identifying A-02, A-32 Intermediate Connector
    G02389934Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 8: Identifying C-35 Intermediate Connector
    G02389935Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are there harness wires in good condition? 

    1. YES  : Go to Step 5.
    2. NO  : Repair the damaged harness wire. Then go to  Step 7.
  5. STEP 5. Check the harness wire between TCL switch connector C-35 terminal 2 and ground for damage. 
    Fig 9: Identifying C-35 Intermediate Connector
    G02389936Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 10: Identifying A/T Selector Lever
    G02389937Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step 6.
    2. NO  : Repair the damaged harness wire. Then go to  Step 7.
  6. STEP 6. Retest the system 

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

    1. YES  : It can be assumed that this malfunction is intermittent. (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO  : Replace the hydraulic unit (integrated with ABS/TCL-ECU < FWD > or TCL/ASC-ECU < AWD >). (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS - HOW TO COPE WITH INTERMITTENT MALFUNCTION ). Then go to Step 7.
  7. STEP 7. Retest the system 

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

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