Engine Controls - MIL ON/DTC P0128 Set
XJ303-02DATE
06/04
Amended 06/04
XJ range
MODEL
2004 MY
XJ range
VIN G00001-G27197
MIL On -
DTC P0128 Stored -
Repair Procedure
Remove and destroy Bulletin XJ303-02, dated 06/04.
Replace with this Bulletin.
An ending VIN has been added.
Issue:
Some 2004 MY-ON XJ range vehicles may exhibit a condition where the Malfunction Indicator Lamp (MIL) is lit with Diagnostic Trouble Code (DTC) P0128 (thermostat range/performance faults) stored in the Engine Control Module (ECM).
Action:
In case of a verified customer complaint of the above condition, the ECM should be reconfigured using the Worldwide Diagnostic System (WDS) with software release JTP 759/31 or later. Should a customer express concern, follow the workshop procedure outlined below.
WORKSHOP PROCEDURE
1. Ensure coolant system level is correct and there are no leaks.
Note:
Any coolant leak repairs are to be carried out as a separate Warranty Claim.
2. Position WDS alongside vehicle, switch Portable Test Unit (PTU) "ON" and allow software to load.
Note:
Ensure WDS is loaded with software release JTP 759/31 or later.
3. Connect PTU to vehicle using diagnostic cable.
4. Enter VIN and navigate to the DTC monitor.
5. Ensure the ECM and Transmission Control Module (TCM) are free of DTCs.
Note:
Carry out any associated diagnostic routines and clear any DTCs. Any repairs are to be carried out as a separate Warranty Claim.
6. Navigate to "Configuration Main Menu".
7. Select and run "re-configure existing ECM" application.
8. After re-configuration of ECM is complete, switch "OFF" PTU, disconnect from vehicle and return WDS to original location.
Warranty Information:
Warranty claims should be submitted quoting the information found in the table.
This will result in payment of the stated time and, where applicable parts/miscellaneous expense codes as listed.
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