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DTC 11: Transponder Communication System or Radio Interference of Encrypted Code: Diagnosis

Required Special Tools: 

  1. STEP 1. Check for presence of other key near the key in the ignition. 

    Q: Is there any other key near the key in the ignition? 

    1. YES :  Move the other key well away from key being used. Retest the system.
    2. NO :  Go to Step 2.
  2. STEP 2. Check that the engine start using the spare ignition key which encrypted code has been registered. 

    Q: Does the engine start using the spare ignition key for which the encrypted code has been registered? 

    1. YES :  Replace the ignition key that does not work. Then register the password (secret code) and encrypted code. Retest the system.
    2. NO :  Go to Step 3.
  3. STEP 3. Check immobilizer-ECU connector C-22, key reminder switch connector C-207 and ECM connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 1: Locating Immobilizer ECU Connector C-22
    G01881121Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are immobilizer-ECU connector C-22, key reminder switch connector C-207 and ECM connector C-117 in good condition? 

    1. YES :  Go to Step 4.
    2. NO :  Repair or replace the damaged component(s). Confirm that scan tool MB991958 communicates normally.
    Fig 2: Locating ECM Connector C-117
    G01881122Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 3: Locating Key Reminder Switch Connector C-207
    G01881123Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. STEP 4. Check the harness wires between immobilizer-ECU connector C-22 (terminals 10 and 11) and key reminder switch connector C-207 (terminals 7 and 3). 
    Fig 4: Locating Immobilizer ECU Connector C-22
    G01881124Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the harness wires between immobilizer-ECU connector C-22 (terminals 10 and 11) and key reminder switch connector C-207 (terminals 7 and 3) in good condition? 

    1. YES :  Go to Step 5.
    2. NO :  Replace damaged component(s). Confirm that scan tool MB991958 communicates normally.
    Fig 5: Locating Key Reminder Switch Connector C-207
    G01881125Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  5. STEP 5. Check the harness wires between immobilizer-ECU connector C-22 (terminal 5) and ECM connector C-117 (terminal 51). 
    NOTE: Also check intermediate connector C-124 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-124 is damaged, Repair or replace the damaged component(s). .
    Fig 6: Locating Intermediate Connector C-124 And Immobilizer ECU Connector C-22
    G01881126Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the harness wires between immobilizer-ECU connector C-22 (terminal 5) and ECM connector C-117 (terminal 51) in good condition? 

    1. YES :  Go to Step 6.
    2. NO :  Replace damaged component(s). Confirm that scan tool MB991958 communicates normally.
    Fig 7: Locating ECM Connector C-117
    G01881127Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. STEP 6. Using scan tool MB991502 or MB991958, read the diagnostic trouble code (DTC). 
    CAUTION: To prevent damage to scan tool MB991502 or MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502 or MB991958.
    1. Connect scan tool MB991502 or MB991958 to the data link connector.
    2. Turn the ignition switch to the "ON" position.
    3. Use scan tool MB991502 or MB991958 to check immobilizer system diagnostic trouble codes.
    4. Turn the ignition switch to "LOCK" (OFF) position.
    5. Disconnect scan tool MB991502 or MB9919588.
      Fig 8: Connecting Scan Tool To Data Link Connector
      G01881128Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Which DTC is output, DTC 11 or 12? 

    1. DTC 12 is output  : Refer to DTC 12: Encrypted Codes are Not the Same or Not Registered  .
    2. DTC 11 is output  : Go to Step 7.
    Fig 9: Connecting Scan Tool To Data Link Connector And Personal Computer
    G01881129Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  7. STEP 7. Replace the key ring antenna. 

    Replace the key ring antenna.

    Q: Has the immobilizer system set the DTC? 

    1. YES :  Replace the immobilizer-ECU. Then register the password (secret code) and encrypted code ON-VEHICLE SERVICE  . Retest the system.
    2. NO :  There is no action to be taken.
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