ECM Tune Download Procedure (TB/02/04/NAS)

CLARIFICATION OF TUNE DOWNLOAD PROCEDURE REQUIRED

A number of situations may require the reloading of the Engine Control Module (ECM) tune on Range Rover vehicles. Because there are several areas of potential confusion in this process, it is possible for an incorrect procedure to be followed, disrupting the download and requiring multiple attempts.

FOLLOW CLARIFIED STEP-BY-STEP PROCEDURE

Review and follow the illustrated procedure in this TIB whenever a "non-compulsory" download of a new ECM tune is performed. The Technician will need to follow these instructions to manually select the tune for download. Note the definition of the term "ASSEMBLY" in the context of T4 on-screen instructions:

"ASSEMBLY" = INSTALLED ECM HARDWARE plus  T4 DOWNLOADED SOFTWARE

Information Only

Normal warranty policy and procedures apply. 

Material allowance is included in labor operation. 

CLARIFICATION TO NEW RANGE ROVER ENGINE ECU TUNE UPDATE PROCESS

1. To program engine ECU insert disc "Range Rover 12" or later.
   • Begin a diagnostic session.
   • Click [vehicle configuration] from main menu.
   • Then on this screen, (Fig 1 ), select "EMS ECU checks."
   Fig 1: Screen Display - Programming Engine ECU (1 of 9)

   
2. Verify the battery voltage is fully charged (12 volts or greater).
   NOTE: The battery must be capable of maintaining full charge during this process which is expected to take 15 - 18 minutes total.
3. Connect a battery charger set on low amp current charge to maintain battery state during this process.
4. When the battery condition is satisfactory and the charger connected, click "Continue." Fig 2
   Fig 2: Screen Display - Programming Engine ECU (2 of 9)

   
   NOTE: T4 will check the engine ECU for available programming records. If the ECU is full T4 will prompt for replacement.
5. Click "Continue." Fig 3
   Fig 3: Screen Display - Programming Engine ECU (3 of 9)

   
   NOTE: This screen is NOT relevant for vehicles that only need the tune update.
6. Click "Continue." Fig 4
   Fig 4: Screen Display - Programming Engine ECU (4 of 9)

   
   NOTE: This screen is NOT relevant for the update.
7. Click "NO". Fig 5
   Fig 5: Screen Display - Programming Engine ECU (5 of 9)

   
   NOTE: An "ASSEMBLY" is defined as the combination of HARDWARE + SOFTWARE. By changing the TUNE the ASSEMBLY will also be changed.
8. Click "YES." Fig 6
   Fig 6: Screen Display - Programming Engine ECU (6 of 9)

   
   NOTE: If "View Fixes" is clicked, T4 will return to the previous screen.
9. Click "Confirm Fix" to continue. Fig 7
   Fig 7: Screen Display - Programming Engine ECU (7 of 9)

   
   NOTE: This screen, (Fig 8 ), identifies which tune is being installed. Technical Information Bulletins or other documentation will list a specific "Assembly" or software level which can be verified here. If the correct Assembly is not listed verify the following:
   

   • The correct diagnostic CD is being used to perform the tune update.
   • Other unexpected issues may have caused T4 to select the incorrect tune.
10. If you do not have the correct assembly number, contact Land Rover Technical Helpline.
11. If you get the proper assembly number (See Fig 8 ), click "Continue."
    Fig 8: Screen Display - Programming Engine ECU (8 of 9)

    
    NOTE: T4 will commence the ECU tune download. This screen, (Fig 9 ), will indicate the progress. The % download is indicated at the top of screen indicating that the process is active and T4 has not locked up. When done AFTER approximately 15 minutes, the page will advance to a "Download Complete" with some details displayed.

    Fig 9: Screen Display - Programming Engine ECU (9 of 9)

    
12. If there is an incomplete download, "Download Failed" will display. Follow the instructions displayed by T4 carefully to complete ECM programming.
13. If the additional attempts fail repeatedly, there may be an ECM or other mechanical vehicle issues. Investigate the vehicle for the problem.
14. To verify that the programming has been completed, go to the main T4 menu and select: System Diagnosis, Petrol Engine Management, Vehicle Maintenance, Programming History.