SAAB WIS ONLINE

Main beam, xenon, US/CA/JP

Main beam, xenon, US/CA/JP


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 fed from connection 11 on the light switch (10) to pin 15 on the control module. When the switch (215) is turned on, B+ voltage will be fed from pin 6 to DICE pin 41. DICE turns on the main beam when pin 11 on the control module grounds pin 5 on the main beam relay (8a). With the relay closed, B+ voltage will be fed via fuse 12 to pin 2 on the right-hand headlamp and via fuse 10 to pin 2 on the left-hand headlamp, whereby the motors will drop the xenon lamp screens.

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 and the diagnostic communication is in use.

Headlamp flasher, US/CA/JP

Light switch in position 2





Light switch in position 0



Main beam signal, as known as a “main beam flash”, can be activated with the main/dipped beam switch (215) to the right of the steering wheel. The main beam flash can only be activated when dipped beam is active.

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

The function has no diagnostics.