The CODE unit inside Body Computer
M1 is supplied from the
battery from the line for fuse F1 of B1 pin 18 of connector F, while
the ignition-operated power supply (INT) reaches pin 9.
The line leading from pin 29 of connector
B of the Body Computer
M1 is a serial line W leading to engine
management unit M10 - which is responsible for the communication required
for identifying the key and exchanging codes.
This communication
takes place via the CAN network in the case of normal operation
from pins 36 and 37 of connector B of
M1.
Body Computer
M1 is linked to instrument
panel E50, via the CAN line to manage the CODE failure warning light:
if there is a system failure or an unprogrammed system is detected,
the information is also shown on the display.
The aerial of CODE device
P91
is
connected via two leads to the CODE unit of
M1
, at pins
4 and 5 of connector A; The aerial is located coaxially on the ignition
switch so that it can register key insertion and activation.