900 SE Convertible V6-2498cc 2.5L DOHC (1995)
The relays are located in the main fuse box under the dashboard adjacent to the steering column.
3. Instrumentation Systems
The ICE sends information to the SID unit and the main instrument display panel:
^ on the sound the SID unit is to generate, e.g. "tick tack" for the direction indicators or "ding dong" for the seat-belt and ignition key
warning.
^ on a defective rear lamp bulb or brake light so that the "DEFECTIVE LAMP" indicator lamp lights up in main instrument display panel
1 or the "INFO DISPL" lamp in main instrument display panel 2 with clear text in the SID unit's display.
^ on coolant temperature to the main instrument display panel.
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 Integrated Central Electronics (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 Instrument Panel, Gauges and Warning Indicator 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 Electronic Climate Control 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.
FAULT DIAGNOSIS HINTS
An Intelligent Saab Tester (ISAT) scan tool should be used for diagnosing faults in the integrated central electronics system.
