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Writing Procedure

Required Special Tools: 

CAUTION: Check that diagnostic trouble code P0603 "EEPROM fail" is not set. When diagnostic trouble code P0603 "EEPROM fail" is set, the ECM cannot store the key code even if the key code is registered. If this diagnostic trouble code is set, troubleshoot the ECM and repair. Then register the key code to the ECM.
CAUTION: Check that diagnostic trouble code P0630 "VIN not programmed" is not set. When diagnostic trouble code P0630 "VIN not programmed" is set, the VIN is not written to the ECM. After VIN is written in ECM, the Key Code Registration is executed.

Connect scan tool MB991958 to the 16-pin data link connector as follows.

NOTE: For details on how to use scan tool MB991958, refer to the "M.U.T.-III Owner's Manual".
  1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
  2. Start up the personal computer.
  3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
  4. Connect special tool MB991910 to the special tool MB991824.
  5. Connect special tool MB991910 to the data link connector of the vehicle.
    6. Fig 1: Connecting Special Tool MB991910 To Data Link Connector
    G05373979Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. Turn the special tool MB991824 power switch to the "ON" position.
    NOTE: When the special tool MB991824 is energized, the special tool MB991824 indicator light will be illuminated in a green color.
  7. Start the "M.U.T.-III system" on the personal computer and turn the ignition switch to the "ON" position.
  8. Select "F.A.S.T./IMMO/Keyless/TPMS" button from the "System Select" screen. Then, select the applicable option code item and push the OK button.
    9. Fig 2: Pushing Ok Button
    G05373980Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  9. Select "Special Function" on the next screen.
  10. Select "ENG Key Code Reg." from the "Special Function" screen.
    Fig 3: Scan Tool Display Screen - ENG Key Code Reg. (1 Of 2)
    G05373981Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 4: Scan Tool Display Screen - ENG Key Code Reg. (2 Of 2)
    G05373982Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  11. Push the OK button after "ENG Key Code Reg." is displayed.
    12. Fig 5: Scan Tool Display Screen - Ok Button
    G05373983Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  12. Push the OK button after "Completed." is displayed.
  13. Turn off scan tool MB991958.
  14. Turn the ignition switch to the "LOCK" (OFF) position and then disconnect scan tool MB991958.
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