Redundant Data Storage

Redundant Data Storage




The specific information stored redundantly includes:
- Vehicle ID number
- Total mileage
- Service Interval data

The data is stored in the cluster and in the Light Check Module (LCM). The storage of this data follows the redundant storage of the IKE. It prevents the loss of total mileage or SI data in the event of a cluster processor failure.

The data is compared each time KL 15 is switched ON. If the data does not match, the manipulation DOT in the mileage display 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 illuminated and no data transfer takes place. All functions of both modules will continue to operate.
2. Data will only be accepted by the cluster from the LCM if the ID numbers match and the cluster mileage is zero.
3. The vehicle ID number is input into the cluster through coding and will only be accepted when the cluster is at zero mileage.
4. The LCM stored mileage can only be overwritten with a higher mileage and is updated every 60 miles.
5. If the mileage differs by more than 120, and the ID numbers are the same, the cluster will continue recording the mileage and set a fault for data transfer.
6. If the K Bus link to the LCM fails, the cluster will continue to record mileage and store a fault for the data link.

These conditions will only allow new components to be installed for replacement purposes. However, a used component can be installed for testing purposes. If a cluster from another vehicle is used for testing purposes, road testing of the vehicle should be avoided, because the cluster will accumulate mileage.