323000085 - E2020 DIRECTION INDICATORS/HAZARD WARNING LIGHTS - DESCRIPTION

DESCRIPTION

The left and right direction indicators are switched on by raising or lowering the special stalk lever on the left of the steering wheel interface; the function is activated with the key in the MAR position.The hazard warning lights (left and right direction indicators operated simultaneously) are activated via a button in the centre of the dashboard, which activates all the direction indicators at the same time. An LED at the back of the control button also comes on, synchronized with the flashing of the exterior lights.The hazard warning lights function can be activated with the ignition switch to any state, whilst for the direction indicators to be used, the key must be in the MAR position, as explained previously.The Body Computer manages the activation of the direction indicators as well as the hazard warning lights. Once the command from the steering wheel interface or dashboard button has been received, the Body Computer makes the lights and the warning light in the instrument panel flash at a determined frequency. At the same time as the lights are activated, a buzzer inside the instrument panel provides an intermittent warning signal at the same frequency.The direction indicators check function checks that the lights are working properly: the following possible faults are monitored for each of the two circuits (vehicle right side and left side branch):- circuit open or bulb missing- short-circuit to earth (bulb s.c. or wiring s.c. to earth)- short circuit to battery voltage (wiring short circuited to Vbatt)When one of the situations described above is ascertained, the Body Computer makes the failure status available to the CAN: a special amber coloured lights failure warning light comes on in the instrument panel and the information is simultaneously shown in the display.In addition, at the same time as a failure warning light comes on, the flashing frequency of the visual indication in the display and the frequency of the acoustic signal double; the flashing frequencies of the exterior lights and the LED in the hazard button, on the other hand, remain unchanged.

the direction indicators are also used to signal that the commands sent by the remote control have been received and/or to signal a manoeuvre not carried out by the passenger compartment access control system.    See E3040 CENTRAL LOCKING