Functional descrip-

FUNCTIONAL DESCRIP-

The ALFA ROMEO CODE control unit N77 to be found next to the fusebox G1, is connected via connector B to a special part of cables to the receiver N78, consisting in a coaxial aerial with the ignition switch. Through connector A it is connected to the Motronic control unit S11 and to the other systems: at pin 8 it receives the "key-operated" supply and through the line of fuse F15 (10A), while at pin 3 it receives the direct supply via connector Q of G1, and pin 4 is earthed. The connection line with the ALFA ROMEO CODE warning light on the instrument panel leaves from pin 2.

Pins 5 and 6 manage communication between the ALFA ROMEO CODE control unit N77 and the Motronic control unit S11: this communication takes place "cutting off" the diagnosis line K which leads from S11 to the diagnosis connector T1.