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Headlamps, Bi-Xenon

Fig 1: Bi-Xenon Headlamps Input And Output Signals
GLL146376Courtesy of VOLVO CARS CORPORATION
1. Motor, high / low beam Power supply via relay. Reconnected PWM signal provides information about the position of the reflector to the central electronic module (CEM).
2. Motor, headlamp range adjustment Controlled by the central electronic module (CEM) using a PWM signal.
3. Position sensor Inductive sensor which sends an analog signal (voltage) to the rear electronic module (REM) (Does not apply to vehicles with Four-C (Continuously Controlled Chassis Concept)). In vehicles with Four C the signal travels via the suspension module.
4. Ballast High voltage regulator for switch and lamp.
5. Gas discharge lamp Socket