WIS Document: 16949

| | ICE (Integrated Central Electronics) ICE (Integrated Central Electronics) is a programmable electronic unit which controls a number of relays as well as sending and receiving information to and from different components. Signals controlling the following lighting system functions go out from ICE: | • | Main beam | • | Dipped beam | • | Extra fog lights | • | Interior lighting and reading lamps | • | Direction indicators, hazard flashers | • | Monitoring of rear parking lights and brake lights The following lighting system components send information to ICE: | • | Stalk switch for lights | • | Dipswitch | • | Direction indicator switch | • | Hazard flasher switch | • | Switch for extra fog lights | • | Brake-light switch The following information is sent out from ICE: | • | Rear or brake light bulb failure to the auxiliary instrument panel | • | The sound to be used for the direction indicators If a bulb at the rear fails, ICE sends a signal to the auxiliary instrument panel which grounds the "BULB FAILURE" warning lamp in main instrument panel 1. If a bulb at the front fails, the filament monitor grounds the lamp in the main instrument panel via the auxiliary instrument panel. If the car is equipped with auxiliary instrument panel 2 or 3, ICE and the filament monitor send a signal to the auxiliary instrument panel, which lights up a message on the display: | • | BRAKE LIGHT FAILED | • | FRONT LAMP FAILED | • | REAR LAMP FAILED Simultaneously, the auxiliary instrument panel lights up the INFO DISPL lamp in main instrument panel 2. ICE also controls a "Follow me home" function, i.e. if the headlamp flasher is activated after the door has been opened, dipped beams will remain on for about half a minute. For more information on ICE and fault diagnosis in the lighting system, refer to Service Manual 3:5 "Electrical system, instruments" .