Engine Controls - Terrain Response System Inop.

No.: LTB00022

Issue: 1

Date: May 24, 2007

SECTION: 303-14

Terrain Response System Selection Inoperative

AFFECTED VEHICLE RANGE:
Land Rover LR3 (LA) with 4.0L V6 VIN: 7A413982 to 7A421834

CONDITION SUMMARY:

SELECTION OF ALTERNATE TERRAIN MODE DOES NOT ALTER VEHICLE BEHAVIOR

Situation:
A customer may report that when a Terrain Response system selection appropriate to the driving conditions results in limited change in the accelerator pedal/engine response. This may be more noticeable when selecting Grass/Gravel/Snow or Sand programs where the engine response may feel similar to when Special Programs are not selected. A software calibration issue is the cause of the above complaint.

Action:
If a customer expresses concern regarding the above, refer to the Service Procedure detailed in this bulletin to update the engine control module software.

PARTS:

No parts required

TOOLS:

IDS DVD 104 with and Patch File 4 or later





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

UPDATE ECM WITH LATEST SOFTWARE

CAUTION:
A Midtronics PSC-550 Vehicle Power Supply must be connected to the vehicle battery during diagnosis. The diagnostic lead must be correctly secured during the software update.

NOTE:
IDS with DVD 104 or later must be installed.

1. Connect the Midtronics PSC-550 power supply to the vehicle battery.

2. Connect IDS to the vehicle and begin a new diagnostic session, by entering the correct VIN for the current vehicle.

3. Note the current software levels of the engine control module as follows:

^ Follow the prompts to read the vehicle configuration.

^ When prompted "Do you wish to read diagnostic trouble codes?" select "NO" and then press "tick" 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, check the on-screen software part number information that IDS will display during this step and compare to the software part number noted in step 3 above. If the same tune level is displayed, the vehicle already has the desired software level and the tune download process can be aborted.

4. Configure the control module as follows:

^ Return to the Vehicle Configuration screen and select Module Configuration

^ Follow the on-screen prompts.

^ Select Configure Existing Modules".

^ From the sub-menu, select Engine Control Module

^ Check the tick-box to continue and follow the on-screen instructions.

5. Repeat step 3 to confirm the software level change.

6. Exit the IDS session and disconnect the diagnostic equipment from the vehicle.





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