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Service Procedure





ROM ID INFORMATION TABLE

GDS ECM REPROGRAMMING PROCEDURE:

Important Cautions for Reprogramming:

^ Reprogramming by GDS can only be performed by using the USB cable between a laptop and the VCI; wireless cannot be used for reprogramming.

^ Make sure the GDS laptop battery indicator at the bottom right of the screen indicates at least 25% battery charge remaining to be able to complete reprogramming; if not, charge the laptop or keep the AC adaptor connected while reprogramming.

^ Perform reprogramming with the ignition key in the ON position.

^ Turn off all lights (do not leave headlight switch in auto mode) and all accessories (including heater/air conditioner/blower, radio, heated seat, rear defroster, etc.) to make certain the battery will not be discharged during reprogramming.

^ Connect a battery power supply to vehicle 30 Amps minimum.

^ Be careful not to disconnect any cables connected to the vehicle during reprogramming.

^ Do not start the engine during reprogramming.

^ Do not turn the ignition switch OFF during reprogramming.





1. Connect the GDS VCI module to the vehicle's DLC connector and the USB cable between the VCI and GDS laptop's USB port.

2. Turn on vehicle ignition and make sure the green power LED is lit on the VCI; if it is not lit press on the power button of the VCI. Within a few seconds, the GDS screen should indicate VCI:USB On in bright blue to the left of the VIN button on the screen

NOTES:
You must have an internet connection to GDS to be able to receive any updated data; the bright blue internet On should illuminate to the left of the VIN button.

If a GDS internet update is available, it could take up to several minutes to download and complete the update.





3. Make sure the GDS has the latest data by pressing the bottom right Internet Update button on the GDS screen. You will get a confirmation on the GDS screen if it is already updated (See below); otherwise the Download Start button will be viewable and should be pressed to update the GDS.

4. Press the VIN button at the top of the screen to launch the GDS VIN search screen.





5. Press the VIN Auto Detect button to automatically read the vehicle's VIN (or you will need to manually enter vehicle, year, and engine if it does not automatically read this information) then enter Engine for system followed by the OK button.





6. Press the ECU Upgrade button on the following screen:





7. In the left column of the following ECU Upgrade screen select Auto Mode followed by ENGINE, then the OK button:





8. The following screen occurs as GDS is reading the present ECU ROM ID:

9. After the ECU ID is read make a note of the Current ROM ID in case the reprogramming does not complete in auto mode. If it does not reprogram automatically, you will need the ROM ID to perform a manual mode reprogram attempt.





10. Select Upgrade Event: 80 EP 3.8 07MY P0441 LOGIC and then press the UPGRADE button as shown in the screen shown.





11. Select OK to confirm you are correctly following these TSB instructions:





12. Reprogramming of the ECU will begin starting with this screen and gradually show the progress on the bar:








13. After 15-20 minutes the progress bar will complete. Make sure to wait for the success confirmation pop-up screen that indicates reprogramming has been completed:

14. Key off ignition for 10 seconds then turn back on to reset the ECU.

15. Finally check that no incidental DTCs have been created by the reprogramming and, if there are, that they don't return after being cleared. If they return after being cleared, follow the diagnostic directions for that DTC.

GDS MANUAL MODE (ERROR MODE) REPROGRAMMING PROCEDURE:

Follow these steps in the event EGU reprogramming was not successful or did not complete using the above GDS Auto Mode reprogramming instructions:

1. Turn off the ignition key for 20 seconds and then turn it back on; this will assure the EGU is reset.





2. Within the ECU Upgrade screen in the left column select Manual Mode followed by ENGINE. Then select Upgrade Event: 80 EP 3.8 07MY P0441 LOGIC followed by the EGM part number from the table shown based on the original ROM ID information.

NOTE:
If you didn't write down the original ROM ID when initially attempting the Auto Mode reprogram instructions, then repeat steps 7-8 of the Auto Mode instructions to read the ROM ID, then repeat steps 1-2 again.








3. Next enter the appropriate password from the table shown and select OK in the ECU Upgrade screen shown.








4. Reprogramming should begin and after a few minutes the progress bar will be filled:





5. Follow any pop-up screen instructions that appear during reprogramming. Reprogramming has been completed successfully when the confirmation pop-up screen appears as shown.

6. Finally check that no incidental DIG have been created from the reprogramming and, if there are, that they don't return after being cleared. If they return after being cleared follow the diagnostic directions for that DTC.
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