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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction, Wiring Diagrams And Basic Inspection) >> Basic Inspection >> Additional Service When Replacing ECM >> Work Procedure
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Work Procedure

  1. SAVE ECM DATA

    G-20 With CONSULT

    1. Turn ignition switch OFF.
    2. Reconnect all harness connectors disconnected.
    3. Turn ignition switch ON.
    4. Select "SAVING DATA FOR REPLC CPU" in "WORK SUPPORT" mode of "ENGINE" using CONSULT.
    5. Follow the instruction of CONSULT display.
    NOTE:
    • Necessary data in ECM is copied and saved to CONSULT.
    • Go to Step 2 regardless of with or without success in saving data.

    GO TO STEP 2  .

  2. CHECK ECM PART NUMBER

    Check ECM part number to see whether it is blank ECM or not.

    NOTE:
    • Part number of blank ECM is 23703 - *****.
    • Check part number when ordering ECM or the one included in the label on the container box.

    Is the ECM a blank ECM?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP  5.

  3. SAVE ECM PART NUMBER

    Read out the part number from the old ECM and save the number, following the programming instructions. Refer to CONSULT Operation Manual.

    NOTE:
    • The ECM part number is saved in CONSULT.
    • Even when ECM part number is not saved in CONSULT, go to 4.

    GO TO STEP 4  .

  4. PERFORM ECM PROGRAMMING

    After replacing ECM, perform the ECM programming. Refer to CONSULT Operation Manual.

    NOTE:
    • Refer to REMOVAL AND INSTALLATION for replacement of ECM.
    • During programming, maintain the following conditions:
      • Ignition switch: ON
      • Electric load: OFF
      • Brake pedal: Not depressed
      • Battery voltage: 12 - 13.5 V (Be sure to check the value of battery voltage by selecting "BATTERY VOLT" in "Data monitor" of CONSULT.)

    GO TO STEP 6  .

  5. REPLACE ECM

    Replace ECM. Refer to REMOVAL AND INSTALLATION .

    GO TO STEP 6  .

  6. PERFORM INITIALIZATION OF IVIS (NATS) SYSTEM AND REGISTRATION OF ALL IVIS (NATS) IGNITION KEY IDS

    Refer to WORK PROCEDURE .

    GO TO STEP 7  .

  7. CHECK ECM DATA STATUS

    Check if the data is successfully copied from the ECM at Step 1 (before replacement) and saved in CONSULT.

    Is the data saved successfully?

    YES 

    GO TO STEP 8  .

    NO 

    GO TO STEP 9  .

  8. WRITE ECM DATA

    G-20 With CONSULT

    1. Select "WRITING DATA FOR REPLC CPU" in "WORK SUPPORT" mode of "ENGINE" using CONSULT.
    2. Follow the instruction of CONSULT display.
    NOTE:

    The data saved by "SAVING DATA FOR REPLC CPU" is written to ECM.

    GO TO STEP 10  .

  9. PERFORM VIN REGISTRATION

    Refer to DESCRIPTION .

    GO TO STEP 10  .

  10. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

    Perform Accelerator Pedal Released Position Learning. Refer to DESCRIPTION .

    GO TO STEP 11  .

  11. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

    Perform Throttle Valve Closed Position Learning. Refer to DESCRIPTION .

    GO TO STEP 12  .

  12. PERFORM IDLE AIR VOLUME LEARNING

    Perform Idle Air Volume Learning. Refer to DESCRIPTION .

    END

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