900 S Sedan V6-2498cc 2.5L DOHC (1995)
Integrated Central Electronics (ICE) Control Module: Description and Operation
Because the Integrated Central Electronics (ICE) system is so extensive, only information of a more general nature can be given here.
The ICE is a programmable electronic unit which controls a number of relays as well as sending and receiving information (signals) to and from different
components.
The ICE Unit Controls The Following Functions:
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Main and dipped beams
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Follow-me-home function
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Direction indicators, hazard flashers
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Extra fog lights
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A/C compressor turn-OFF
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Radiator fan (high and low speed)
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Intermittent wash/wipe, windshield and rear window
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Electrical heating of rear window and door mirrors
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Interior lighting and reading lamps
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Seat-belt and ignition-key warning
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Monitoring of rear parking lights and brake lights
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Electrically adjustable front seats
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Monitoring of battery voltage
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Electrically heated rear seat
The Following Components Send Information (signals) To The ICE:
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Lights switch
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Dipswitch
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Direction indicator stalk switch and hazard flashers switch
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Switch for extra fog lights
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Brake light switch
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Coolant temperature sensor
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A/C system pressure switches
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Windshield and rear window wiper stalk switch
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Automatic climate control panel with information for electrically heated rear window and A/C compressor
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Door switches
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Driver's seat-belt switch
^
Ignition switch
The ICE Sends The Following Information:
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Door open (to main instrument display panel and anti-theft alarm)
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Different types of sound, such as for seat-belt and ignition key reminder (to the Saab Information Display [SID] unit)
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Rear light or brake light failure (to SID unit)
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Coolant temperature (to main instrument display panel)
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Prior notice of radiator fan turn-ON/turn-OFF (to M2.10.3 engine management system)
1. Lighting Front And Rear
In regard to the lighting systems, the ICE controls the relays for the lights, main and dipped beam, and extra fog lights.
Main and dipped beam are monitored by means of a filament monitor located together with the lighting relays in the main fuse box in the
engine bay.
The Integrated Central Electronics (ICE) monitors the rear parking lights, brake lights and high-level brake light.
Should a rear light bulb fail, the ICE informs the SID unit which grounds the "Defective lamp" warning lamp in main instrument display panel
1 or displays a message and lights up the "INFO DISPL" lamp in main instrument display panel 2.
The ICE also controls a "Follow-me-home" function, i.e. if the dipswitch is actuated after the door is opened, dipped beams will continue to
shine for about 30 seconds after the door is closed.
2. Wash/Wipe Systems
The ICE controls the relays for intermittent wiper operation and wiping after washing of the windshield and rear window.
The ICE controls the windshield and rear window wipers so that they will be synchronized after a single sweep cycle.
When the windshield and rear window have been washed and the wipers have completed 3-4 cycles, the ICE causes the windshield wipers to
carry out an extra sweep cycle after 8 seconds and the rear window wiper an extra sweep cycle after 16 seconds.
