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Work Procedure

  1. INSPECTION START 
    1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled maintenance.
    2. Open engine hood and check the following:
      G16071139Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      • Harness connectors for improper connections
      • Wiring harness for improper connections, pinches and cut
      • Vacuum hoses for splits, kinks and improper connections
      • Hoses and ducts for leaks
      • Air cleaner clogging
      • Gasket
    3. Confirm that electrical or mechanical loads are not applied.
      • Headlight switch is OFF.
      • Air conditioner switch is OFF.
      • Rear window defogger switch is OFF.
      • Steering wheel is in the straight-ahead position, etc.
    4. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.
      G16071140Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

      Ensure engine stays below 1, 000 rpm.

    5. Run engine at about 2, 000 rpm for about 2 minutes under no load.
      G16071141Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    6. Make sure that no DTC is displayed with M.U.T.-III SE or GST.

    Is any DTC detected? 

    YES >>

    GO TO  2.

    NO >>

    GO TO  3.

  2. REPAIR OR REPLACE 

    Repair or replace components as necessary according to corresponding Diagnostic Procedure.

    >>

    GO TO  3.

  3. CHECK TARGET IDLE SPEED 
    1. Run engine at about 2, 000 rpm for about 2 minutes under no load.
    2. Rev engine (2, 000 to 3, 000 rpm) two or three times under no load, then run engine at idle speed for about 1 minute.
      G16071142Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    3. Check idle speed.

    For procedure, Refer to IDLE SPEED: PERIODIC MAINTENANCE .

    For specification, Refer to IGNITION TIMING: SERVICE DATA .

    Is the inspection result normal? 

    YES >>

    GO TO  10.

    NO >>

    GO TO  4.

  4. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING 
    1. Stop engine.
    2. Refer to DESCRIPTION .

    >>

    GO TO  5.

  5. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING 

    Refer to DESCRIPTION .

    >>

    GO TO  6.

  6. PERFORM IDLE AIR VOLUME LEARNING 

    Refer to DESCRIPTION .

    Is Idle Air Volume Learning carried out successfully? 

    YES >>

    GO TO  7.

    NO >>

    Follow the instruction of Idle Air Volume Learning.

    Then GO TO 4  .

  7. CHECK TARGET IDLE SPEED AGAIN 
    1. Start engine and warm it up to normal operating temperature.
    2. Check idle speed.

    For procedure, Refer to IDLE SPEED: PERIODIC MAINTENANCE .

    For specification, Refer to IGNITION TIMING: SERVICE DATA .

    Is the inspection result normal? 

    YES >>

    GO TO  10.

    NO >>

    GO TO  8.

  8. DETECT MALFUNCTIONING PART 

    Check the Following.

    Is the inspection result normal? 

    YES >>

    GO TO  9.

    NO >>

    Repair or replace. Then

    GO TO  4.

  9. CHECK ECM FUNCTION 
    1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
    2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to WORK PROCEDURE .

    >>

    GO TO  4.

  10. CHECK IGNITION TIMING 
    1. Run engine at idle.
    2. Check ignition timing with a timing light.
    (1) Timing indicator 
    G16071143Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    For procedure, Refer to IGNITION TIMING: PERIODIC MAINTENANCE .

    For specification, Refer to IGNITION TIMING: SERVICE DATA .

    Is the inspection result normal? 

    YES >>

    INSPECTION END.

    NO >>

    GO TO  11.

  11. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING 
    1. Stop engine.
    2. Refer to DESCRIPTION .

    >>

    GO TO  12.

  12. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING 

    Refer to DESCRIPTION .

    >>

    GO TO  13.

  13. PERFORM IDLE AIR VOLUME LEARNING 

    Refer to DESCRIPTION .

    Is Idle Air Volume Learning carried out successfully? 

    YES >>

    GO TO  14.

    NO >>

    Follow the instruction of Idle Air Volume Learning. Then

    GO TO  4.

  14. CHECK TARGET IDLE SPEED AGAIN 
    1. Start engine and warm it up to normal operating temperature.
    2. Check idle speed.

    For procedure, Refer to IDLE SPEED: PERIODIC MAINTENANCE .

    For specification, Refer to IGNITION TIMING: SERVICE DATA .

    Is the inspection result normal? 

    YES >>

    GO TO  15.

    NO >>

    GO TO  17.

  15. CHECK IGNITION TIMING AGAIN 
    1. Run engine at idle.
    2. Check ignition timing with a timing light.
    (1) Timing indicator
    G16071143Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    For procedure, Refer to IGNITION TIMING: PERIODIC MAINTENANCE .

    For specification, Refer to IGNITION TIMING: SERVICE DATA .

    Is the inspection result normal? 

    YES >>

    INSPECTION END.

    NO >>

    GO TO  16.

  16. CHECK TIMING CHAIN INSTALLATION 

    Check timing chain installation. Refer to REMOVAL AND INSTALLATION .

    Is the inspection result normal? 

    YES >>

    GO TO  17.

    NO >>

    Repair the timing chain installation. Then

    GO TO  4.

  17. DETECT MALFUNCTIONING PART 

    Check the following.

    Is the inspection result normal? 

    YES >>

    GO TO  18.

    NO >>

    Repair or replace. Then

    GO TO  4.

  18. CHECK ECM FUNCTION 
    1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
    2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to WORK PROCEDURE .

    >>

    GO TO  4.

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