3315566 - E2031 REAR FOG LAMPS - Functional description

Functional description

The operation of the rear fog lamps is also controlled by the electronic Check device M45, which receives the control signal from the switch and controls the bulbs. The supply for the Check device M45 arrives directly from the battery at pin 1 of connector C and 6 of connector E via fuses F17 and F15 of junction unit B2 for the right and left branches of the lights, respectively. The ignition-controlled supply (15/54) arrives via relay T1 and fuse F9 of junction unit B2 at pin 3 of connector B: pin 8 of connector C is earthed. The device M45 receives an input the signal for rear fog lamps switched on from the button located in unit H35 pin 11 of connector A. If, in addition to this signal, there is a dipped headlamps on signal, pin 15 of connector A of the fog lights on signal pin 2 of connector A, then device M45 sends the supply for the rear fog lamps in the left F35 and right F36 light clusters, from pin 11 and 4 of connector E of M45, respectively. At the same time, a signal is sent from pin 8 of connector A to the unit H35 to light up the LED near the button indicating the 'rear fog lamps on' function. The supply for this LED for H35 is controlled by the ignition (15/54) via fuse F6 of junction unit B1; this line gives the go-ahead for lighting up the control panel H35 . The device M45 checks the efficiency of the bulbs and their connections: if faults are detected in the circuit, the 'lights fault' warning light on the instrument panel E50, pin 7 of connector C, is lit from pin 6 of connector A.