Battery Saver Feature

BATTERY SAVER FEATURE
The Battery Saver feature is contained internally in the Instrument Cluster. This feature prevents battery run-down in the event of extended parasitic draw from the courtesy lamp circuit when the ignition is in the OFF position.

Power - Down
The cluster has a sleep mode to lower current draw during ignition off. When the cluster is in the sleep mode, portions of the cluster are powered down. Conditions that will prevent the cluster from entering the sleep mode:
* Ignition in the Run/Start position.
* Park/Headlamps on.
* Vehicle door(s) open (ajar switch closed to ground). Operates without the doors OFF vehicle jumper fuse removed.
* Cluster processing PCI Bus messages.
* Panel dimming switch set to illuminate interior lamps.

The cluster will enter the sleep mode approximately 5 (five) seconds after all of the above conditions are eliminated. If all of the conditions are met except the door ajar switches, the cluster will keep the courtesy lamps illuminated for approximately 20 (twenty) minutes. Then the cluster will turn OFF the courtesy lamps and then enter the sleep mode. While the cluster is in the sleep mode, an internal timer will wake the cluster microprocessor every 262 milliseconds to check input status. If conditions change the cluster will resume normal operation, otherwise it will stay in the sleep mode.

Power - Up
When the cluster is in the sleep mode, it will awaken to the operating mode with the following conditions:
* Any door opening (ajar switch closed to ground).
* Park/Headlamp switch input.
* Ignition switch transition to Run/Start.
* PCI Bus messages.
* Panel dimming switch transitions to interior lamp illumination.