900 SE Convertible V6-2498cc 2.5L DOHC (1995)
4
Climate systems
The ICE controls the relay for heating of the rear window and door mirrors and monitors one or two pressure switches in the A/C system.
Information that the A/C compressor is going to be turned ON passes via the ICE control module. This is so that the ICE control module can turn
OFF the compressor if the coolant temperature is exceptionally high.
For control of the radiator fan in the event of high pressure in the A/C system, see also Cooling system.
5
Cabin systems
The ICE controls the interior lighting and reading lamps by grounding them. It also lights up the seat-belt warning lamp on the dashboard for 6
seconds when the ignition is switched ON.
Some cars have a seat-belt reminder with a "ding- dong" sound and an ignition key reminder. The ICE sends information to the SID unit which
generates the sound. See also Instrumentation systems.
The electrically adjustable seats can be operated if a door is open or if the ignition is switched on (+54 circuit).
If a door is left open for more than 20 minutes, the ICE switches OFF the interior lighting and stops grounding the seat relay to save the battery.
6
Charging system
The ICE checks battery voltage continuously and after a time may switch OFF the electrically heated rear window and electrically heated door
mirrors if battery voltage is abnormally high or low.
7
Cooling system
The ICE control module receives continuous information on the temperature of the cooling system from the coolant temperature sensor.
One or two pressure sensors in the A/C system close under different pressure conditions, causing pins 22 and 69 of the ICE control module to be
grounded. If the temperature or pressure is too high, the ICE turns ON the radiator fan by grounding the relay or relays.
If there are two relays, the radiator fan can be run at both high and low speed.
8
Engine systems
The ICE sends a signal to the M2.10.3 engine management system when the radiator fan is going to be turned ON or OFF.
The signal from the climate system to turn on the A/C compressor passes via the ICE, see also Climate systems.
9
Electrically heated rear seat
The ICE controls the length of time the electrically heated rear seat remains switched ON.
When the switch is pressed, the ICE switches on the heating pads for 5 minutes. It then switches them OFF for 2.5 minutes and ON again for
another 2.5 minutes before it switches them OFF altogether.
After this it will be necessary to press the switch to turn ON the heating pads, following which the entire cycle will be repeated.
It is possible to activate the heating pads during the 2.5 minute turn-OFF period by pressing the switch. The complete cycle will then start from
the beginning again.
Current is disconnected for a maximum of 20 seconds during starting.
