Unfortunately there is no solution to date for this problem other than replacement of the entire Steering Column. Below is a description of the information I have gathered.

The symptom that the user experiences is when the key is inserted, the key is not allowed to turn. Thus preventing the user from starting the vehicle.

 

The Steering Column Interlock is a very complex mechanism. Modern vehicles have a steering column interlock that locks the wheel from moving while the vehicle is off. Most vehicles have the key in the steering column. This allows a direct physical connection between the key and the steering column lock. The Range Rover has the key located in a different location. This creates the need to have a physical lock mechanism in the steering column. A separate locking mechanism that locks and unlocks depending on the status of the vehicle key creates a unique set of problems.

 

Because there is a danger that the steering column could lock accidentally while driving, the mechanism has several safety interlocks. There is a position sensor on the interlock servo mechanism and there is a position sensor on a locking solenoid. The two physical devices work together. If the sensor data does not agree, then the system locks down the steering wheel.

 

The symptom that the user experiences is when the key is inserted, the key is not allowed to turn. Thus preventing the user from starting the vehicle.

 

The steering column interlock ECU and the key cylinder and the vehicle immobilizer all talk to each other in the first 100ms as the vehicle key approaches the ignition cylinder. If the steering column interlock is in an error state, the key is not allowed to turn and start the vehicle. This prevents the user from ever having a locked steering column and running engine.

 

A power cycle of the Steering Column Interlock ECU resets this lock down for one cycle. Usually the servo motor fails or the sensor in the solenoid fails. There are no replacement parts. I have checked with the original company manufacturers.

 

The Steering Column Interlock ECU and mechanism are extremely difficult to gain access to. There are blind roll pins that lock the assembly into the steering column assembly. To gain access, the roll pins must be drilled out and the metal enclosure opened up.

 

 

The first time that you start the All comms software, you will be prompted for a software license key. You must select the Activate Online option to proceed with the activation.



You should have received an email with the activation code. Simply copy and paste the activation code into the appropriate field, as shown below.



The software will now go online and verify that the activation code is valid. Please make sure that you do not have any firewall applciations or spyware blocker applications that may accidentally block the internet traffic.



This is an example of the positive confirmation that the software has fully compelted the license validation process.



If you need to deactivate the software license from this machine, simply choose the deactivate license under the tools menu.



The license has now been removed from this machine and you can reactivate on a different physical workstation.

Service Interval Indicator Reset Procedure
The service interval can be reset with the following procedure using the instrument pack buttons. TestBook/T4 can also be used to reset the service interval indicator by connecting to the diagnostic socket and following the reset procedure.
NOTE: The distances and dates shown are examples only and not necessarily representative of actual messages displayed.
Check and Reset Procedure
1. Ensure that the ignition is switched off.
2. Press and hold the LH instrument pack button.
3. With the button held, switch the ignition on to position I (AUX).
4. Continue to hold the LH instrument pack button for a further 5 seconds, until the “SIA RESET” appears.
5. The message centre will display the distance to service status as “RESET SIA: 3600km/mls” and the type of service (OIL SERVICE or INSPECTION).
6. Check that the reset distance limit has been reached.
a) If yes, proceed to step 9.
b) If no, proceed to step 7.
7. Press the LH button once. The message centre will display the date to service status as “RESET SIA: 03.12”.
8. Check that the reset date limit has been reached.
a) If yes, proceed to step 11.
b) If no, proceed to step 10.
9. When the distance reset limit has been reached or exceeded, press and hold the LH button for 5 seconds. “RESET” flashes in the message centre five times.
a) If the LH button is not pressed again before the fifth flash of “RESET”, the reset will not be performed. The message centre will display “END SIA: 3600 km/miles” for 5 seconds and the display will change to the service date “RESET SIA: 12.03”.
b) If the LH button is pressed before the fifth flash of “RESET”, the service distance will be reset. The message centre will display the new service distance “END SIA: 25000 km/miles” for 5 seconds. The service date will then be displayed.
10. Press the LH button once. The message centre will display “END SIA” for 2 seconds. This ends the service interval check and reset.
11. When the date reset limit has been reached or exceeded, press and hold the LH button for 5 seconds. “RESET” flashes in the message centre five times.
a) If the LH button is not pressed again before the fifth flash of “RESET”, the reset will not be performed. The message centre will display “END SIA: 03.12” for 5 seconds. “END SIA” will be displayed for a further 2 seconds and the service interval and check will be ended.
b) If the LH button is pressed before the fifth flash of “RESET”, the service date will be reset. The message centre will display the new service date “END SIA: 04.12” for 5 seconds. “END SIA” will be displayed for a further 2 seconds and the service interval and check will be ended.

The service interval indicator system can only be reset again after 2 1 / 2 gallons (10 litres) of fuel has been recorded as used by the instrument pack.