Redundant Data Storage

Redundant Data Storage




This specific information is:
- Vehicle ID number
- Total mileage
- Service Interval information

To guard against the loss of specific vehicle information, it is stored in both the IKE and the lamp module (LCM).

This data is compared each time KL15 is switched on. If the data check reveals a mismatch, the manipulation DOT is illuminated.

Because of this redundant storage feature, the following points must be noted:
1. If the vehicle ID number is not the same in both modules, the manipulation DOT is activated and there is no data exchange between the IKE and LCM. All functions of both modules will continue to work (car can be test driven).
2. Data is only accepted from the LCM by the IKE if the ID number is the same and the IKE is at 0 miles.
3. The vehicle ID number is input into a module by way of the DIS tester and only accepted if the mileage recorder in the module is at 0 miles.
4. The LCM mileage data can only be over written with a higher mileage and is updated every 60 miles (100 km).
5. If the distance differs by more than 120 miles (200 km) and the ID numbers are the same, the IKE stores a data transfer fault.
6. If the I-Bus link to the LCM faults, the IKE stores this fault and continues to record the mileage driven.

The condition that controls the redundant date exchange and allows only new components to be used as replacement.

If the IKE from another car is used for testing purposes, test driving the car should be avoided if possible. If the vehicle is test driven, the IKE will record mileage and this mileage will be added to total mileage of the original car.