DIPPED HEADLIGHTS - FUNCTIONAL DESCRIPTION

Xenon Gas headlamps

FUNCTIONAL DESCRIPTION

Two signals (earth) are sent from the steering wheel stalk unit H5 to the Body Computer M1 that manages both side lights and low beams in manual or AUTO mode (automatic dusk sensor activation).

The "Light 1" signal is sent from pin 28 of connector G of Body Computer M1 from stalk unit H5, pin 7 of connector C.

The "Light 2" signal is sent to pin 2 of connector I of the Body Computer M1 from the steering column switch unit H5, pin 8 of connector C. The dipped headlamps are switched on manually when the "Light 1" is absent and when the "Light 2" signal is also missing.

The dipped headlamps are activated in AUTO mode when the Light 1 signal is present and the Light 2 signal is not present. If both signals are present, the lights are constantly off.

The dipped headlamps are automatically activated by the dusk sensor housed in the mirror P65 (signal via the A-BUS line at pin 7 of connector D of M1); the dusk sensor in P65 receives a supply from the INT line protected by fuse F49 of junction unit B2.

The Body Computer M1 controls the supply for the dipped headlamps sending an earth signal to relay T1 in the junction unit under the dashboard B2 from pin 8 of connector F of M1 which energizes relay T1: this supplies the dipped headlamps F10 (left) and F11 (right). Each circuit is protected by a fuse in the junction unit B2: F13 for the left headlamp and F12 for the right.

Both electronic systems inside the headlamps F10 (left) and F11 (right) are supplied - pin 9 - from the INT line of junction unit B2 protected by fuse F37.

Pins 12 of the two control units are connected to one another by means of a special serial line, whilst the speedometer signal from the Body Computer M1 (pin 28 of connector B) reaches pin 10 of the junction unit located in headlamp F10.

Pins 11 of the two headlamps are connected to the diagnostic K line

See E8010 DIAGNOSTIC MULTIPLE CONNECTOR

The Body Computer M1 is connected via the CAN line to the instrument panel E50 to manage the "dipped headlamps on" warning light and, if there are problems detected in the circuit, the specific warning light.

All versions

FUNCTIONAL DESCRIPTION

Two signals (earth) are sent from the steering wheel stalk unit H5 to the Body Computer M1 that manages both side lights and low beams in manual or AUTO mode (automatic dusk sensor activation).

The "Light 1" signal is sent from pin 28 of connector G of Body Computer M1 from stalk unit H5, pin 7 of connector C.

The "Light 2" signal is sent to pin 2 of connector I of the Body Computer M1 from the steering column switch unit H5, pin 8 of connector C. The dipped headlamps are switched on manually when the "Light 1" is absent and when the "Light 2" signal is also missing.

The dipped headlamps are activated in AUTO mode when the Light 1 signal is present and the Light 2 signal is not present. If both signals are present, the lights are constantly off.

The dipped headlamps are automatically activated by the dusk sensor housed in the mirror P65 (signal via the A-BUS line at pin 7 of connector D of M1); the dusk sensor in P65 receives a supply from the INT line protected by fuse F49 of junction unit B2.

The Body Computer M1 controls the supply for the dipped headlamps sending an earth signal to relay T1 in the junction unit under the dashboard B2 from pin 8 of connector F of M1 which energizes relay T1: this supplies the dipped headlamps F10 (left) and F11 (right). Each circuit is protected by a fuse in the junction unit B2: F13 for the left headlamp and F12 for the right.

The Body Computer M1 is connected via the CAN line to the instrument panel E50 to manage the "dipped headlamps on" warning light and, if there are problems detected in the circuit, the specific warning light.