Engine Controls - 'Engine System Fault'/DTC P061A-29
No.: LS303-007Issue: 1
Date: July 03, 2006
SECTION: 303-14
'Engine System Fault' Message Displayed - DTC P061A-29
AFFECTED VEHICLE RANGE:
Range Rover Sport (LS) (4.2L S/C only) VIN: 6A900129 to 6A958472
CONDITION SUMMARY:
Situation:
A customer may report a concern of reduced engine performance and the message 'Engine System Fault' displayed. This message may have cleared following the next ignition cycle. Diagnostic Trouble Code (DTC) P061A-29 'Internal Control Module Torque Performance' will be stored within the Engine Control Module (ECM).
A software calibration sensitivity issue may be the cause. If the software incorrectly detects a difference between the values generated by the two methods used for calculating engine torque, the vehicle engine will enter a 'limp home' mode.
Action:
Should a customer express a concern regarding this situation, refer to the Repair Procedure detailed in this bulletin to update the Engine Control Module software.
TOOLS
WARRANTY:
NOTE:
Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
REPAIR PROCEDURE
DOWNLOAD LATEST ECM SOFTWARE TUNE
1. If WDS CD13 has Patch File 5 (or later) installed or IDS DVD101 (or later) is being used, go to step 6.
NOTE:
A software patch installation help file located on GTR provides instructions for the patch file installation process and could take up to six minutes to download depending on connection speed. For information on how to confirm that the patch file has been correctly installed onto WDS/IDS, refer to the applicable Patch Process Help File located in GTR. Global Technical Reference (GTR) lookup sequence is as follows:
GTR Home > NAS > Diagnostics/LS - Range Rover Sport/2006 > Patch Files > "Patch Process Help File - T4WDS or IDS" link
2. Logon to GTR from an internet connected PC and download the WDS Patch Process Help File as follows:
^ Select 'Home' from the menu at the top of the main page.
^ From the menus on the left of the page, select 'Diagnostics' as the 'Information Type' and select the relevant model and model year.
^ From the 'All Information' results, select 'Patch Files'.
^ Click the appropriate 'Patch Process Help File - T4WDS' file link.
NOTE:
This could take up to twenty minutes to download depending on connection speed.
3. Using the help file as a guide, follow the instructions to download and save WDS CD1 3 Patch File 5 (or later).
4. Install the software patch file 'WDS CD13 - Patch File 5' (or later) into T4WDS.
5. Verify that WDS successfully restarts.
CAUTION:
A Midtronics PSC-550 Vehicle Power Supply must be connected to the vehicle battery during diagnosis and module configuration.
The diagnostic lead must be correctly secured to prevent accidental disconnection during the software update.
6. Connect the Midtronics PSC-550 power supply to the vehicle battery.
7. Connect the diagnostic equipment to the vehicle and begin a WDS/IDS session.
8. Note the current software levels of the Engine Control Module (ECM) as follows:
^ Follow the prompts to read the vehicle configuration.
^ When prompted 'Do you wish to read Diagnostic Trouble Codes?',
select "NO" and click the [Check Mark] tick-box to continue.
^ When the 'Content Model' is displayed, select the 'Vehicle Configuration' tab.
^ Select 'Module Information'.
^ Select 'Network integrity test'.
^ Note the software part numbers displayed on the screen.
NOTE:
During module configuration, the on-screen software part number information that WDS/IDS will display can be checked against the software part number noted in step 8 above. If the same software part number is displayed, the vehicle already has the desired tune level and the software download procedure can be discontinued.
9. Configure the Engine Control Module software as follows:
^ Return to the Vehicle Configuration' screen and select 'Module Configuration'.
^ Select 'Configure Existing Modules'.
^ From the sub-menu, select 'Engine Control Module'.
^ Click the [Check Mark] tick-box to continue and follow the on-screen instructions.
^ Note the on-screen software part number information that WDS/IDS will display.
10. Compare the Engine Control Module software part number displayed on WDS/IDS to the software part number noted in step 8 above.
11. If the same software part number is displayed, terminate the tune download.
12. If a different software part number is displayed, complete the tune download to update the software.
13. Exit the WDS/IDS session and disconnect the diagnostic equipment from the vehicle.
Disclaimer