Engine Controls - ECM Replacement Procedures
Classification:
EC00-008c
Reference:
ITB00-038c
Date:
April 16, 2004
ECM REPLACEMENT PROCEDURES
ATTENTION:
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.
APPLIED VEHICLES:
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All 2000 and later
1999 Q45 (FY33)
1999 QX4 (JR5O) from VIN JNRAR07**XW060101
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:
^ Re-register all customer keys if the vehicle has ECM based NATS (see step 1).
^ Check ASIST for any new updates for the new ECM you're installing (see steps 2 - 4).
^ Perform the "ACCELERATOR PEDAL & THROTTLE VALVE CLOSED POSITION LEARNING" procedure (see step 5).
^ After installing the new ECM, perform the "IDLE AIR VOL LEARNING" procedure (when applicable) using CONSULT-II. See step 6.
^ For 2005 and later vehicles, enter the vehicle VIN into the new ECM (see step 7).
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.
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CLAIMS INFORMATION
Disclaimer
Service Procedure
Check NATS On The Vehicle
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1. Check to see if the vehicle you're working on has ECM based NATS V2.0 or V5.0.
a. 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.
b. 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.
Check For ECM Data Updates in ASIST
- In ASIST select [CONSULT Utilities] >> [ECM/TCM Data]. Then choose Model and Model Year (see Figure 1).
- Look for ECM Data Updates (listed by ECM P/Ns and vehicle configuration) in the top center display panel of the ASIST screen (see Figure
1).
a. If there is no updates listed for your vehicle configuration you do NOT have to reprogram the service replacement ECM. Proceed with
step 5.
b. If there is 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.
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 Figure 1).
a. 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.
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.
b. If your ECM is NOT listed in the Details panel you do NOT have to reprogram the ECM. Proceed with step 5.
Accelerator Pedal & Throttle Valve Closed Position Learning
5. Perform the Accelerator Pedal & Throttle Valve Closed Position Learning as follows:
a. Make sure the accelerator pedal is fully released.
b. Turn the ignition switch "ON" for 2 seconds.
c. Turn the ignition switch OFF for 10 seconds.
d. Turn the ignition switch "ON" for 2 seconds then
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e. Turn the ignition switch "OFF" again for 10 seconds (see Figure 2).
f. Proceed with step 6.
Perform Idle Air Volume Learning (IAVL)
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.
6. Perform the Idle Air Volume Learning procedure as follows:
a. Connect CONSULT-II to the vehicle.
b. Warm up engine and transmission to operating temperature.
c. In the [CONSULT WORK SUPPORT] mode, select [IDLE AIR VOL LEARN]. See Figure 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.
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d. Press [START] on the "IDLE AIR VOL LEARN" screen. See Figure 4.
e. Press [START] on the "WORK SUPPORT" screen to begin the Idle Air Volume Learning (IAVL) procedure. See Figure 5.
^ 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 Figure 6.
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^ CONSULT will display "CMPLT" in the top right corner of the screen when the IAVL procedure is finished. See Figure 7.
f. Once the IAVL procedure is finished proceed with step 7.
For 2005 and Later MY Vehicles ONLY: Enter VIN Into New Service Replacement ECM
7. Enter the VIN into the new service replacement ECM as follows:
a. Select [ENGINE] on the select System screen. See Figure 8.
b. Select [WORK SUPPORT] on the select Diag Mode screen. See Figure 9.
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c. Scroll down and select [VIN REGISTRATION] on the select Work Item screen. See Figure 10.
d. Press [START] on the "VIN Registration" screen. See Figure 11.
e. Select [INPUT] on the "VIN Registration" screen. See Figure 12.
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f. Enter the entire VIN using the keyboard. See Figure 13.
^ Use [CHNG] to switch between the letters and numbers keyboard screens.
g. Once the entire VIN is entered select [ENTER] on the Keyboard screen. See Figure 14.
h. Select [INPUT] on the VIN Registration screen and enter the entire VIN again. See Figure 15.
^ You MUST enter the VIN a second time for confirmation purposes.
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i. Once the entire VIN is entered (a second time) select [ENTER] on the Keyboard screen. See Figure 16.
j. Select [START] on the "VIN Registration" screen to complete the VIN registration process. See Figure 17.
