Steering - Remains In HWY Assist Mode At Low Speed
LTB00434NAS110 FEB 2012
SECTION: 211
Steering Remains in Highway Assist Mode at Low Vehicle Speed
AFFECTED VEHICLE RANGE:
Range Rover (LM)
VIN: AA304426 - onwards
Model Year: 2010 - onwards
CONDITION SUMMARY:
Situation:
The power steering system performance may not be as expected at low vehicle speed with Diagnostic Trouble Code (DTC) B12FB-12 stored in the Body Control Module (BCM). This may be caused by software strategy in the BCM.
Action:
In the event of a customer concern of the above, refer to the Repair Procedure outlined below to update the BCM software.
PARTS:
No parts necessary
TOOLS:
IDS with latest IDS-DVD and Calibration File; first available on IDS-DVD128.07 Calibration File v96 Land Rover-approved Midtronics Vehicle Power Supply
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.
Normal Warranty policies and procedures apply
REPAIR PROCEDURE
UPDATE THE BODY CONTROL MODULE SOFTWARE
CAUTION:
Ensure all ignition "ON" / ignition "OFF" requests are carried out; failure to perform these steps may cause damage to control modules in the vehicle.
CAUTION:
A Land Rover-approved Midtronics Vehicle Power Supply must be connected to the vehicle battery during IDS diagnosis / module programming.
1. Connect the Land Rover-approved Midtronics Vehicle Power Supply to the vehicle battery.
2. Turn ignition ON (engine not running).
NOTE:
IDS must be loaded with IDS-DVD128.07 v96 or later.
3. Connect the IDS to the vehicle and begin a new Symptom Driven Diagnostics (SDD) session.
4. Follow the on-screen prompts, allowing SDD to read the VIN and initiating the data collect sequence.
5. From the Session Type selection screen, choose 'Diagnosis'.
NOTE:
DTC BI2FB-12 must be stored in the BCM.
6. Select the Selected Symptoms tab, and then select:
^ Chassis > Steering system > Steering system symptoms > Steering too heavy
7. Select 'continue'.
8. Select the 'Recommendations' tab.
9. From the Recommendations tab, select 'Run' to 'Configure existing module - Body control module'
10. Select 'Run' to perform the 'Special applications - Heavy steering update'
^ Follow all on-screen instructions to complete this task.
11. Exit the current session.
12. Disconnect the IDS and the Midtronics Vehicle Power Supply from the vehicle.
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