2753518 - E3021 REAR WINDOW WASH/WIPE - Functional description

Functional description

The steering column switch unit H005 sends commands to the body computer node M001 for activating the rearscreen wiper and washer motor by means of a negative signal, with reference to earth C020 connector B (from pin 2 connector B of H005).

Earth C020 is fastened to the passenger compartment floor and is located near the right front wheel arch (footwell area).

Turning the steering column switch unit H005 internal switch A to position 1 (pin 2 connector A) controls the operation of the rearscreen wiper motor. Having received the command, from pin 3 connector E, the body computer node M001, provides the power supply to the rearscreen wiper motor N016. The line is protected by fuse F52, housed inside the body computer node, and is operated by a relay incorporated in the junction unit. The body computer receives the end of stroke signal for the wiper arm from the rearscreen wiper motor N016 at pin 6 connector F. Turning the steering column switch unit H005 internal switch B to position 1 activates the rearscreen washer function. The body computer node M001 provides the supply, from pins 3, 4 connector B, for the rearscreen washer pump motor N022. The supply line is protected by fuse F53, housed in the body computer, and is operated by a relay incorporated in the junction unit. The body computer node activates the rearscreen wiper even when pin 1 connector C receives the reverse gear engagement signal coming from switch I020 (only if the windscreen wiper function is activated).