FUNCTIONAL DESCRIPTION

There is a single (earth) signal sent by the steering column switch unit H005 to the Body Computer M001 that manages all the windscreen wiper commands: from pin 7 of H005 to pin 54 of connector D of M001; the signal sent is coded via resistive dividers so that multiple information can be sent from the steering column switch unit to the Body Computer via a single connection. Pin 10 of H005 receives the reference earth from pin 34 of connector D of M001.

Similarly, the windscreen washer commands are sent from pin 5 of H005 to pin 55 of connector D of M001.

The Body Computer M001 - connector A - receives a direct powr supply from the battery through the line protected by maxi fuse F01 of the engine compartment junction unit B001.

The Body Computer M001 receives an ignition-controlled (INT) power supply at pin 11 of connector E, whilst the ignition-controlled (INT/A) signal reaches pin 1 of connector E.

Pin 9 of connector E of M001 provides the Body Computer with a reference earth.

According to the function selected, the Body Computer M001 sends the following control signals to the windscreen wiper motor N015:

- from pin 14 of connector C for fast operation;

- from pin 3 of connector C for slow and/or intermittent operation;

- pin 39 of connector B, on the other hand, receives the earth signal coming from the motor end of travel cam which stops operation. The windscreen wiper motor N015 is then earthed.

The Body Computer M001 sends two signals from pins 15 and 2 of connector C which activate the windscreen washer pump N022 which turns sending the detergent fluid to the front windscreen.

The supply lines for the windscreen wiper motor and the pump are protected by fuse F43 located in the Body Computer M001.

The rain sensor located on the rear view mirror P065 receives a power supplly from the INT line protected by fuse F49 of M001 and sends the Body Computer the automatic activating signal via the A-BUS serial line at pin 48 of connector F of M001.

The Body Computer M001 is connected via the CAN line to the instrument panel E050 to manage the failure warning light and signalling if the rain sensor fails.