SAAB WIS ONLINE

Main beam, xenon, other markets

Main beam, xenon, other markets



Main beam is turned on by moving the dipswitch on the steering column towards the steering wheel rim when the light switch is in position 2 and the ignition is ON. DICE activates the main beam relay (8a).

To enable DICE to determine what position (0-1-2) the light switch (10) is set to, the control module uses bus information from TWICE and its own pins 39 and 15.

TWICE monitors the parking lights and sends information on the bus (Rear light Left ON/OFF and Rear light Right ON/OFF). The ON message corresponds to switch position 1 and the OFF message corresponds to position 0 or 2.

To enable DICE to determine the position setting, it uses pins 39 and 15. DICE pin 39 is connected to light switch pin 10, which corresponds to position 0. DICE pin 15 is connected to light switch pin 11, which corresponds to position 2.

B+ is supplied to control module pin 15 from connection 11 on the light switch (10). When light switch (215) is on, B+ voltage is fed from pin 6 to pin 41 on DICE. DICE lights the main beam by pin 11 on the control module grounding pin 5 on the main beam relay (8). When the relay is closed, B+ is fed through the relay to the filament monitor (228b) via fuse 12 to pins 2 and 7 on the right-hand headlamp and via fuse 10 to pins 2 and 7 on the left-hand headlamp.

MIU (540) is powered from fuse 10 so that a lamp 47g on MIU comes on to indicate that the main beam is on.

Important

When changing a bulb, select a new bulb of the correct rating to prevent the components being damaged.


Diagnosis

Diagnostic trouble code B2280 is generated in the event of an open circuit or a short circuit to ground in the main-beam relay circuit.

DTCs are not generated if the voltage is below 11 V or during diagnostic communication.

Headlamp flasher



The headlamp “flasher” can be activated whatever the positions of the ignition switch and the light switch by using the dipswitch (215) to the right of the steering wheel.

The headlamp flasher turns on the halogen lamp when the lights are switched off. With the lights switched on, the halogen lamp will come on together with the xenon lamp.

When the switch (215) is moved to its “spring-back” position with the lights off, voltage will be applied via fuse 7 and the filament monitor (228b) to the headlamp (663FL/663FR) pins 2 and 7.

When the switch (215) is moved to its “spring-back” position with the lights on, voltage will be applied to the headlamp (663FL/663FR) pin 2 via fuse 7.

The MIU (540) receives power from fuse 10 so that a lamp on the MIU lights up to indicate that the main beam is on.

Diagnosis

This function does not have diagnostics.