ECM Reprogramming

ECM Reprogramming

CAUTION:
DO NOT DISTURB THE HARNESS CABLES OR CONNECTIONS. INTERRUPTION DURING THE REPROGRAMMING PROCESS COULD CAUSE THE CONTROL UNIT TO LOSE DATA OR PREVENT FUTURE REPROGRAMMING.

1. Conduct the following steps to reprogram the ECM.

a. Turn the ignition key or knob (F.A.S.T. equipped) to the ON position. If the vehicle is equipped with the F.A.S.T. System, the fob must remain in the vehicle for the entire procedure.





b. Select "Special Function."





c. Select "ECU reprogramming."





d. Select "Automatic Reprogramming (CAN)."





e. Click on the car icon at the bottom of the page.





f. Click on the Eraser Icon at the bottom of the page.

Select VIN by clicking on the VIN button.





g. Click on the icon in the lower RH corner of the screen to have the MUT-III automatically read the VIN. If a message appears saying that the VIN cannot be input automatically, manually type the 17 digit VIN into the VIN field.

Make sure the VIN is correct and click on the check mark.








h. If it was not completed automatically, input the vehicle class. Click on the CLASS button, select the appropriate class from the menu and then click the check mark at the bottom of the page. Vehicle class can be found on the Vehicle Information Code Plate riveted to the base of the RH b-pillar (see photo above). The class is part of the model code.

Click the check mark to enter the class. Confirm that all of the data is correctly entered and click the check mark at the bottom of the page.





i. MFI should already be highlighted. If not, click on it to highlight it.





Click on the check mark at the bottom of the page.





j. A message will advise you that the system will "Automatic search the data."

Click on the check mark to continue.

NOTE:
If this screen does not appear, continue with step k.

If the PCM is already reprogrammed for this concern, this screen will display. If this message displays, do not continue with this reprogramming procedure.





Click the check mark to clear the window, then click on the Home icon at the lower left corner of the screen to return to the System Select main page.

k. The CAN database screen will display. <





Confirm the database number at the top right of the table is N08091 or higher. <

If more than one row is displayed in the table, select the appropriate ECM part number. <





Click on the check mark to continue. <

l. Click on the check mark to begin reprogramming.

NOTE:
It will take up to 5 minutes to complete the reprogramming process.

CAUTION:
The Daytime Running Lights and both the engine and condenser fans will automatically be turned on during reprogramming. Care should be taken to insure nothing gets caught in the moving fan blades. The radio will be turned off and you will also hear a chime in the interior for a short period of time. These are normal conditions.

m. This message will display when the ECM reprogramming is successfully completed. Record the S/W (Software) Part No. and compare it to the "New S/W Part No." from the ECM Reprogramming Chart shown in this TSB. Turn the ignition to the OFF position for a minimum of 8 seconds, then turn it back on.





Click the check mark and you will be returned to the "ECU Reprogramming" page.

Turn the ignition to the OFF position for approximately 10 seconds, then turn it to the ON position. Continue with Erase and Read All DTCs shown in this bulletin.