LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2000 >> QX4 >> Repair and Diagnosis >> Quick Lookups >> Technical Bulletins >> Technical Service Bulletins >> Engine Control Systems >> ECM Replacement Procedures (ITB00-038C)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ECM Replacement Procedures (ITB00-038C)

Publication date: 2004-04-16
Reference number: ITB00-038C
Supersedes refnos: ITB00-038A, ITB00-038B

ECM REPLACEMENT PROCEDURES

ECM REPLACEMENT PROCEDURES

TECHNICAL SERVICE BULLETIN

Reference Number(s): ITB00-038C, Date of Issue:  April 16, 2004
INFINITI: All 2000 and later; 1999 Q45, QX4
CLASSIFICATION: EC00-008C
SECTION: Engine Control System
APPLIED VEHICLE(S): All 2000 and later; 1999 Q45 (FY33); 1999 QX4 (JR50) from VIN JNRAR07**XW060101
Superceded Bulletin(s): ITB00-038B, Date of Issue:  January 4, 2001
NOTE: THIS BULLETIN HAS BEEN REVISED.
  • The Service Procedures for replacing an ECM on an Applied vehicle were revised.
  • Please use this bulletin ITB00-038C for complete information.
  • Discard all previously distributed copies of ITB00-038.

IF YOU CONFIRM

The Electronic Control Module (ECM) needs to be replaced on a 2000 MY and later vehicle, or an Applied 1999 MY vehicle (see above).

ACTIONS

CAUTION: Failure to perform all the work steps in the specified order can cause poor engine running, MIL 'ON', or vehicle emission test rejection.
IMPORTANT: The purpose of "ACTIONS" (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire Service Procedure as it contains information that is essential to successfully completing this repair.

CLAIMS INFORMATION

If the ECM is replaced WITHOUT re-programming, submit a Primary Failed Part (PP) line using the following claims coding:

CLAIMS INFORMATION W/O RE-PROGRAMMING

Description PFP OP Code SYM DIA FRT
Replace Engine Control Module (1) DE28AA (2) 32 (3)
Combination, if required: Enter VIN into ECM. 2005-up vehicles ONLY. --- DE281A --- --- 0.2 hrs
Perform Idle Air Volume Learning procedure (5) --- DE96AA (5) --- --- (3)
Reprogram NATS Immobilizer key(s) --- RL49AA --- --- (3)
As per the indicated Section "E" Diagnostic Op Code --- (4) --- --- (4)
(1) Use the indicated ECM P/N as the PFP.
(2) Use the customer complaint.
(3) Reference the current Infiniti Flat Rate Manual and use the indicated Flat Rate Time for the vehicle being repaired.
(4) As Indicated from the Main Section "E" diagnostic Op Code.
(5) Includes adequate time to perform the "ACCELERATOR PEDAL & THROTTLE VALVE CLOSED POSITION LEARNING" procedure.

If the ECM is replaced and requires re-programming, submit a Primary Failed Part (PP) line using the following claims coding:

NOTE: You MUST retain the final CONSULT-II printout with the ECM P/N and Calibration ID number and attach it to the work order as a permanent record.
CLAIMS INFORMATION W/RE-PROGRAMMING

Description PFP OP Code SYM DIA FRT
Replace Engine Control Module (3) DE28AA (1) 32 (2)
Reprogram New ECM --- DE97AA --- --- (2)
Combination, if required: Enter VIN into ECM. 2005-up vehicles ONLY. --- DE281A --- --- 0.2 hrs
Perform Idle Air Volume Learning procedure (5) --- DE96AA (5) --- --- (2)
Reprogram NATS Immobilizer key(s) --- RL49AA --- --- (2)
As per the indicated Section "E" Diagnostic Op Code --- (4) --- --- (4)
(1) Use the customer complaint.
(2) Reference the current Infiniti Flat Rate Manual and use the indicated Flat Rate Time for the vehicle being repaired.
(3) Reference the final CONSULT-II printout and use the indicated ECM P/N as the PFP.
(4) As Indicated from the Main Section "E" diagnostic Op Code.
(5) Includes adequate time to perform the "ACCELERATOR PEDAL & THROTTLE VALVE CLOSED POSITION LEARNING" procedure.

SERVICE PROCEDURE

  1. Check NATS On The Vehicle
    Check to see if the vehicle you're working on has "ECM based" NATS V2.0 or V5.0.
    1. If the vehicle has ECM based NATS V2.0 or V5.0, it will NOT start after you install a service replacement ECM. So you'll have to re-register all ignition keys, including spare keys with CONSULT-II and the purple NATS card. After you do this, proceed with step 2.
      • If you do not know how to re-register the keys, refer to the ESM for the NATS key re-registration procedure.
    2. If the vehicle has "BCM based" NATS (instead of ECM based NATS V2.0 or V5.0), you do NOT have to re-register the ignition or spare keys. Proceed with step 2.

  2. Check For ECM Data Updates in ASIST
    In ASIST, select CONSULT Utilities >> ECM/TCM Data. Then choose Model and Model Year (see Fig 1).
    Fig 1: Checking For ECM Updates
    G00384605
  3. Look for ECM Data Updates (listed by ECM P/Ns and vehicle configuration) in the top, center display panel of the ASIST screen (see Fig 1).
    1. If there are no updates listed for your vehicle configuration, you do NOT have to reprogram the service replacement ECM. Proceed with step 5.
    2. If there are updates listed for your vehicle configuration, see if they apply to the service replacement ECM you're going to install. Do this by performing step 4 (next step).
  4. Select the "configuration" on the screen for the vehicle you're working on. Then confirm that your ECM is listed in the "Replaces 23710-XXXXX, -XXXXX, etc" section in the lower, center "Details" panel of the ASIST screen (see Fig 1).
    1. If your ECM is listed in the "Details" panel, you must reprogram the ECM with the latest data update. After you do this, proceed with step 5.
      • If you do not know how to reprogram the ECM, refer to ITB00-005C for the ECM Reprogramming Procedure.
      CAUTION: The 1999-2000 Q45 and 1999-2000 QX4 have a gray CONSULT connector AND a white GST connector. Do NOT attempt to perform the ECM Reprogramming procedure with CONSULT-II connected to the gray CONSULT connector. See the appropriate ESM for further details if necessary.
    2. If your ECM is NOT listed in the "Details" panel, you do NOT have to reprogram the ECM. Proceed with step 5.

  5. Accelerator Pedal & Throttle Valve Closed Position Learning
    Perform the Accelerator Pedal & Throttle Valve Closed Position Learning as follows:
    1. Make sure the accelerator pedal is fully released.
    2. Turn the ignition switch "ON" for 2 seconds.
    3. Turn the ignition switch "OFF" for 10 seconds.
    4. Turn the ignition switch "ON" for 2 seconds, then
    5. Turn the ignition switch "OFF" again for 10 seconds (see Fig 2).
    6. Proceed with step 6.
    Fig 2: Accelerator Pedal & Throttle Valve Closed Position Learning Pattern
    G00384606

  6. Perform Idle Air Volume Learning (IAVL)
    Perform the Idle Air Volume Learning procedure as follows:
    NOTE: Make sure all electrical loads are turned OFF, including A/C, defroster, radio, lights, etc. while performing the following procedures. Also, make sure the engine cooling fans are NOT operating during the following procedures.
    1. Connect CONSULT-II to the vehicle.
    2. Warm up engine and transmission to operating temperature.
    3. In the CONSULT WORK SUPPORT mode, select IDLE AIR VOL LEARN. See Fig 3.

      NOTE: 

      • If IDLE AIR VOL LEARN is not shown as a SELECT WORK ITEM on CONSULT, the vehicle does not need the procedure.
      • In this case only, this bulletin is complete, no further action is needed.
      Fig 3: Selecting IDLE AIR VOL LEARN
      G00384607
    4. Press START on the "IDLE AIR VOL LEARN" screen. See Fig 4.
      Fig 4: Pressing Start On IDLE AIR VOL LEARN Screen
      G00384608
    5. Press START on the "WORK SUPPORT" screen to begin the Idle Air Volume Learning (IAVL) procedure. See Fig 5.
      Fig 5: Pressing Start On WORK SUPPORT Screen
      G00384609
      • The IAVL procedure will take several minutes to complete.
      • CONSULT will display "Please Wait" in the center of the screen while the IAVL procedure is in process. See Fig 6.
        Fig 6: "Please Wait" Displayed
        G00384610
      • CONSULT will display "CMPLT" in the top right corner of the screen when the IAVL procedure is finished. See Fig 7.
        Fig 7: IAVL Procedure Complete Screen
        G00384611
    6. Once the IAVL procedure is finished, proceed with step 7.

  7. For 2005 and Later MY Vehicles ONLY: Enter VIN Into New Service Replacement ECM
    Enter the VIN into the new service replacement ECM as follows:
    1. Select ENGINE on the "Select System" screen. See Fig 8.
      Fig 8: Selecting ENGINE
      G00384612
    2. Select WORK SUPPORT on the "Select Diag Mode" screen. See Fig 9.
      Fig 9: Selecting WORK SUPPORT
      G00384613
    3. Scroll down and select VIN REGISTRATION on the "Select Work Item" screen. See Fig 10.
      Fig 10: Selecting VIN REGISTRATION
      G00384614
    4. Press START on the "VIN Registration" screen. See Fig 11.
      Fig 11: Pressing Start On VIN REGISTRATION Screen
      G00384615
    5. Select INPUT on the "VIN Registration" screen. See Fig 12.
      Fig 12: Selecting Input On VIN REGISTRATION Screen
      G00384616
    6. Enter the entire VIN using the keyboard. See Fig 13.
      • Use CHNG to switch between the letters and numbers keyboard screens.
      Fig 13: Keyboard Screen
      G00384617
    7. Once the entire VIN is entered, select ENTER on the "Keyboard" screen. See Fig 14.
      Fig 14: Selecting Enter On Keyboard Screen
      G00384618
    8. Select INPUT on the "VIN Registration" screen and enter the entire VIN again. See Fig 15.
      • You MUST enter the VIN a second time for confirmation purposes.
      Fig 15: Selecting Input Again On VIN REGISTRATION Screen
      G00384619
    9. Once the entire VIN is entered (a second time), select ENTER on the "Keyboard" screen. See Fig 16.
      Fig 16: Selecting Enter Again On Keyboard Screen
      G00384620
    10. Select START on the "VIN Registration" screen to complete the VIN registration process. See Fig 17.
      Fig 17: Selecting Start On VIN REGISTRATION Screen
      G00384621
    11. Turn the ignition switch OFF and wait at least 10 seconds.
scientia non olet · About LEMON Manuals