Engine Controls - Low Power/MIL ON/DTC P0483
No.: LA-303-005Issue: 1
DATE: May 02, 2006
SECTION: 303-14
Diagnostic Trouble Code P0483 with Reduced Engine Performance
AFFECTED VEHICLE RANGE:
Land Rover LR3 (LA) VIN: 5A000360 to 6A387097
CONDITION SUMMARY:
IMPROVED SOFTWARE AVAILABLE TO RESOLVE P-CODES
Situation:
A customer may report a concern that the engine is running at reduced power with the message "Reduced Engine Performance" displayed. The engine warning lamp may also be illuminated. Investigation using the worldwide diagnostic system (WDS) reveals diagnostic trouble code (DTC) P0483 (engine fan performance). A software calibration sensitivity between the actual engine speed and the cooling fan speed may result in the above logged DTCs.
Action:
Should a customer express concern regarding the above, refer to the Service Procedure detailed in this bulletin to update the engine control module software.
TOOLS:
WDS CD13 - with Patch File 3 installed
WARRANTY
REPAIR PROCEDURE
INSTALL LATEST ENGINE CONTROL MODULE TUNE
1. If WDS has previously had the patch file (WDS CD13 - Patch File 3) installed, go to step 5.
NOTE:
The software patch installation help file provides instructions for the patch file installation process and could take up to six minutes to download dependent on connection speed. For information on how to confirm that the patch file has been installed onto WDS, refer to the patch process help file.
NOTE:
GTR lookup sequence is as follows:
GTR Home> NAS> Diagnostics/LA - LR3/2006> Patch Files > "Patch Process Help File" link
2. Log on to GTR from an internet connected PC and download the WDS software patch installation 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 file link 'Patch Process Help File'.
NOTE:
This could take up to twenty minutes to download dependent on connection speed.
3. Using the help file as a guide, follow the instructions to download and save WDS CD13 - Patch File
4. Install the software patch file 'WDS CD13 - Patch File 3' into T4/ WDS and verify that WDS successfully restarts.
NOTE:
Midronics battery charger PSC550 must be connected to the vehicle battery during diagnosis/module configuration.
5. Connect the diagnostic equipment to the vehicle and begin a WDS or IDS session.
6. Note the current software levels of the engine control module as shown.
NOTE:
During module configuration, the on-screen software part number information that WDS/IDS will display can be checked and compared to the software part number noted in step 4 above. If the same tune level is displayed, the vehicle already has the desired software level and the tune download process can be aborted.
7. Configure the control module:
^ Return to the 'Vehicle Configuration' screen and select 'Module Configuration'
^ Select 'Configure Existing Modules'.
^ From the sub-menu, select 'Engine Control Module'
^ Check the tick-box to continue and follow the on-screen instructions.
^ Compare the on-screen software part number information that WDS/IDS will display with the software part number noted in step 4 above.
^ If the same tune level is displayed, terminate the tune download.
NOTE:
Software levels should be as shown, or later.
8. Repeat step 6 to confirm the software level change.
9. Exit the WDS session and disconnect the diagnostic equipment from the vehicle.
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