Principle of Operation-Integrated Central Electronics (ICE)

Integrated Central Electronics(ICE) 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.