|
|
MODULE-FRONT CONTROL DESCRIPTION The Front Control Module (FCM) is a micro controller OPERATION As messages are sent over the CAN bus circuit, the Front Control Module (FCM) reads these messages and con- • Air conditioning condenser cooling fan • Daytime running lamps - if equipped • Fog Lamps • Front and rear hazard warning lamps • Front turn signals • Headlamps • Horn • Radiator fans • Rear window defroster power and timing • Stop, turn signal and tail lamps • Windshield and liftgate wiper and washer systems The FCM provides the following features for the above function: • Acts as a link between the CAN bus network for critical powertrain, anti-lock brake systems, electronic stability • Controls the wipers based on messages on the CAN B bus from the rain sensor module (if equipped). • Controls the adjustable pedal motor on non-memory equipped vehicles. • Controls back-up lamps. • Flashes lamps in response to turn signal, Remote Keyless Entry (RKE) and Vehicle Theft Security System • Illuminated approach feature that turns the headlamps on when the vehicle is unlocked with the Remote Key- • Minimizes voltage variations to the headlamps to extend bulb life and to equalize the light output from the • Monitors battery voltage and turns off non-essential functions such as the fog lamps, rear window defogger, • Operates the high-beam headlamps at reduced intensity by pulse-width modulation of the power supply to pro- • Protects the battery from discharge if the headlamps are left on, by automatically turning them off after eight 8E - 270 ELECTRONIC CONTROL MODULES - SERVICE INFORMATION LX |