80D-12V1 MR-376-X76-80D000$040.mif
LIGHTING
Fault finding – Function80D
UCH
Vdiag No.: 0F
The LIGHTING function is divided into two sub-functions: lighting control and lighting power.
This function is managed directly, without the intervention of the UCH.
1. Lighting control
Operated by the driver
The UCH receives the driver's request via the steering column switches and the hazard warning lights button.
View the statuses of the available commands (see Status summary table).
2. Lighting power
The UCH manages the supply to the interior lighting, the heating and air conditioning system indicator lights, and the
central locking indicator lights.
The UCH manages the supply to the indicators.
The functioning of the lights supplied by the UCH can be checked using the actuator commands AC022 Left-hand
indicator, AC023 Right-hand indicator, and AC145 Front courtesy lights.
Functions available and operating mode
– Hazard warning lights illuminated upon impact:
In the event of an impact detected by the airbag computer, this function sends an activation request to the UCH to
illuminate the hazard warning lights.
The function of illuminating the hazard warning lights in the event of an impact is configured using SC008 UCH type
(See 87B, Passenger compartment connection unit). This function is viewed using LC009 Hazard warning
lights illuminated upon impact.
