Blank ECM Replacement Procedure
Blank ECM Replacement ProcedureBelow is an outline for blank ECM replacement and programming. For C-III plus programming details, go to "Program ECM (When ECM Is Accessible With C-III plus)".
Using a Nissan Electronic Parts Catalog (WIN FAST or equivalent), determine the replacement blank ECM P/N to order for your vehicle.
^ Always use the VIN when looking up the replacement blank ECM P/N.
^ The first five digits of a replacement blank ECMs P/N will start with 23703-xxxxx.
For vehicles where the ECM can be accessed with C-III plus:
a. Connect and launch C-III plus:
> From the C-III plus home page, Select Re/Programming, Configuration.
> Proceed to Re/programming.
> Select Programming (not reprogramming).
b. Select Before ECM Replacement.
c. Save the current ECM P/N and VIN.
d. Replace the ECM with the one previously ordered.
e. Select Programming.
f. Select After ECM Replacement.
g. Select Program ECM.
h. Once programming has completed, perform Throttle Valve Closed Position, Idle Air Volume Learn (IAVL), Accelerator Closed Position, and DTC erase.
i. Verify the VIN is registered.
j. Close C-III plus.
For vehicles where the ECM cannot be accessed with C-III plus:
a. Obtain the ECM software P/N by using the VIN in the electronic parts catalog. When using the VIN, the parts catalog will also display the part number of the software program file to install in the replacement blank ECM.
b. Install the replacement blank ECM in the vehicle.
c. Connect C-III plus, and then get to the screen that shows the selection Programming.
> Select Programming.
d. Select After ECM Replacement.
e. Type in the VIN.
f. Select the P/N from the list that matches the one taken from the parts catalog.
> Double-check and make sure the correct P/N has been selected.
> Confirm that the description matches the vehicles system applications i.e. ABS, CVT, ASCD, etc.
g. Select Program ECM.
h. Once programming has completed, enter the VIN, perform Throttle Valve Closed Position, Idle Air Volume Learn (IAVL), Accelerator Closed Position, DTC erase, and VIN registration.
i. Close C-III plus.
IMPORTANT:
Before starting the program procedure, make sure:
^ ASIST on the CONSULT PC has been freshly synchronized (updated).
^ All C-III plus software updates (if any) have been installed.
NOTE:
The CONSULT PC automatically gets applicable ECM programming data during ASIST synchronization.
^ A screen print for Warranty documentation can be done from the CONSULT PC during this process while still connected to the vehicle.
^ If possible, take the vehicle for a 10 minute drive in order to meet the following conditions:
> Engine coolant temperature: 70 - 100°C (158 - 212°F)
> Battery voltage: More than 12.9V (At idle)
> Transmission: Warmed up
NOTE:
^ After programming is complete, you will be required to perform Throttle Valve Closed Position, Idle Air Volume Learn (IAVL), Accelerator Closed Position, DTC erase, and VIN registration.
> Confirm the VIN is written into the ECM. If not, you will need to write the VIN from the work support menu of ECM.
^ The above conditions are required for the IAVL to complete.
Determine Which Blank ECM Programming Procedure To Use
^ If the ECM could not be accessed by C-III plus during previous diagnosis, go to Program ECM (When ECM Is NOT Accessible With C-III plus).
^ If the ECM could be accessed by C-III plus during previous diagnosis, go to Program ECM (When ECM Is Accessible With C-III plus).